UNIT I Cropping systems: definition, indices and its importance; physical resources, soil and water management in cropping systems; assessment of land use
What is a System?
A system is a group of interacting components, operating together for a common purpose, capable of reacting as a whole to external stimuli: it is unaffected directly by its own outputs and has a specified boundary based on the inclusion of all significant feedbacks. For example, the human body is a system-it has a boundary (e.g., the skin) enclosing a number of components (heart, lungs) that interact (the heart pumps blood to the lungs) for a common purpose (to maintain and operate the living body).
Collection of unrelated items does not constitute a system. A bag of marbles is not a system: if a marble is added or subtracted, a bag of marbles remains and may be almost completely unaffected by the change. The marbles only behave as a whole if the whole bag is influenced, for example by dropping it, but if it bursts the constituent parts go their own ways. It is the properties of the system that chiefly matter and they may be summarized in the phrase ‘behavior as a whole in response to stimuli to any part’.
Ecosystem:
Any collection of organisms that interact or have the potential to interact along with the physical environment in which they live, form an ecological system or ecosystem. Ecosystems are not static entities they are dynamic systems with characteristic pattern of energy flow, nutrient cycling and structural change.
Agro-ecosystem:
Agro-ecosystems are ecological systems modified by human beings to produce food, fibre or other agricultural products. Like the ecological systems they replace, agro-ecosystems are structurally and dynamically complex. But their complexity arises from the interaction between socioeconomic and ecological processes.
Crop system:
An arrangement of crop populations that transform solar energy, nutrients, water and other inputs into useful biomass ie. food, feed, fuel and fibre. Crop system comprised of soils, crop, weed, pathogen and insect subsystems. The crop can be of different species and variety, but they only constitute one crop system if they are managed as a single unit. The crop system is a subsystem of cropping system. For example, in the maize crop system, maize is the dominant crop which is grown in association with other crops.
Cropping Systems:
Cropping systems, an important component of a farming system, represents a cropping pattern used on a farm and their interaction with farm resources, other farm enterprises and available technology, which determine their make up.
It is defined, as the order in which the crops are cultivated on a piece of land over a fixed period or cropping system is the way in which different crops are grown. In the cropping systems, sometimes a number of crops are grown together or they are grown separately at short intervals in the same field.
Cropping Pattern:
It is the pattern of crops for a given piece of land or cropping pattern means the proportion of area under various crops at a point of time in a unit area or it indicated the yearly sequence and spatial arrangements of crops and follows in an area.
Difference between cropping pattern and cropping system
Cropping Pattern | Cropping System | |
---|---|---|
1 | Crop rotation practiced by a majority of farmers in a given area or locality. | Cropping pattern and its management to derive benefits from a given resource base under specific environmental conditions. |
2 | Type and management of crops in time and space. | The cropping patterns used on a farm and their interaction with farm resources, other farm enterprises, and available technology which determine their makeup. |
3 | Yearly sequence and spatial arrangement of crops or crops and fallow on a given area. | The proportion of area under various crops at a point of time in a unit area. Pattern of crops taken up for a given piece of land, or order in which crops are cultivated on a piece of land over a fixed period, associated with soil, management practices such as tillage, manuring, and irrigation. |
Efficient Cropping Systems:
Importance of systems approach
Physical resources, soil and water management in cropping systems
a. by increasing area under cultivationb. by increasing the productivity per unit area of the crop.
a. to increase the production per unit time.b. to increase the production per unit space.
(i) size of area available to the individual plant,(ii) number of plants per unit area.
a. Type and arrangement of crops in time and space i.e. cropping pattern.b. Choice of variety.c. Method of stand establishment.d. Pest management and harvest.
Management of Intercropping Systems
a. Seedbed Preparation:
b. Varieties:
c. Sowing:
d. Fertilizer Application:
e. Water Requirement:
f. Weed Management:
g. Pest and Disease in Intercropping System:
Crop | Nematode | Decoy Crops |
---|---|---|
Brinjal | Meloidogyne incognita | Sesamum orientale |
Tomato | Meloidogyne pratylenchus alleni | Caster, Groundnut |
Soybean | Pratylenchus sp | Crotalarias spectabills |
Management of Sequential Cropping System
a. Seedbed Preparation:
1) The time available for seedbed preparation is less in high intensity cropping system. Frequent rain interference the land preparation.2) Due to prevent crop field may be in condition. For example field preparation after rice is difficult, it is mainly because soil structure is destroyed during puddling.
1. A course texture surface soil,2. Good drainage3. High biological activity of soil fauna.4. An adequate quantity of soil residue mulch and5. Favourable initial soil moisture and friable soil consistency over a wide range of soil moisture.
b. Varieties:
c. Sowing:
d. Soil fertility management:
Cropping System and Integrated Nutrient Management (INM):
The concept of integrated nutrients management (INM) involves use of various inorganic, organic, biological sources of nutrient for improvement and maintenance of soil fertility leading to sustained crop production. Crop responses to organic and biological sources of nutrients for improvement and maintenance of soil fertility leading to sustained crop production:
Crop responses to organic and biological sources of nutrients are not spectacular as to fertilizers, but the supplementary and complementary use of these resources is known to enhance the use efficiency of applied fertilizer besides improving soil physicochemical properties and preventing emergence of micro – nutrient deficiencies. The major components of the INM are fertilizer, organic manures, green manures, crop residues and Biofertilizers. In cereal- based cropping systems, about 25-50% fertilizer NPK dose of rainy season crops could be curtailed with the use of organics such as FYM, green manure and crop residues. In sugarcane based system, integrated use of sulphitation press- mud, cane trash and Biofertilizers each with inorganic fertilizers and green leaf manuring showed 20-25% economy of fertilizers N applied to sugarcane by improving the use efficiency of N, P and other nutrient.
Effect of intensive cropping on soil properties:
Physical properties-
continuous ground cover due to intensive cropping minimizes soil erosion, runoff losses and crust formation. Relatively higher amount of crop residues due to intensive cropping improves soil structure.
Chemical Properties-
Organic residues in intensive cropping systems should be recycled to maintain optimum organic carbon in the soil for sustained production.
Factors for Determining the Fertilizer Schedule are:
- Soil supplying power
- Total uptake by crops
- Residual effect of fertilizers
- Nutrients added by legume crops
- Crop residues left on the soil.
- Efficiency of crops in utilizing the soil and applied nutrients.
Growing different crops during different seasons alters the soil nutrient status, estimated by soil analysis at the beginning of the season. The soil supplying power increases with legume in rotation.
2. Fertilizer application and addition of crop residues. The available nitrogen and potassium in soil after groundnut are higher to initial status of the soil. But after pearl millet, only potassium status in the soil is improved and no changes in P.
3. Nutrient Uptake by Crops: The total amount of nutrients taken by the crops in one sequence gives an indication of the fertilizer requirement of the system. The balance is obtained by subtracting the fertilizer applied to crops that nutrient taken by the crops.
4. Residual Effect of Fertilizers: The extent of residues left over in the soil depends on the type of fertilizer used. Phosphatic fertilizer and FYM have considerable residue in the soil, which is useful for subsequent crops. The residues left by potassium fertilizers are marginal.
5. Legume effect: Legumes add nitrogen to the soil in the range of 15 to 20 kg/ha. The amount of nitrogen added depends on the purpose. Green gram grown for grain, contributes 24 and 30 kg N respectively to the succeeding crop. Inclusion of leguminous green manures in the system add 40 kg to 120 kg N/ha. The availability of phosphorous is also increased by incorporation of green manure crops. Potassium availability to subsequent crop is also increased by groundnut crop residues. Crop residues add considerable quantity of nutrients to the soil. Cotton planted in finger millet stubbles benefits by 20 to 30 kg/ha due to decomposition of stubbles. Deep rooted crops- cotton, red gram absorbs nutrients from deeper layers. Leaf fall and decomposing add phosphorus to top layers. Crop residues containing high C: N ratio like stubbles of sorghum, pearl millet temporarily immobile nitrogen. Residue of legume’s crop contains low C: N ratio and they decompose quickly and release nutrients.
6. Efficiency of crops: Jute is more efficient crop for utilizing of nitrogen followed by summer rice, maize, potato and groundnut in that order. Phosphorus efficient crops, jute > summer rice> Kharif rice> potato > groundnut > maize. Groundnut is more efficient in potassium utilization followed by maize, jute, summer rice, Kharif rice, and potato. Fertilizer recommendation should be based on cropping system e.g. in wheat based cropping system an extra dose of 25% nitrogen is recommended for wheat when it is grown after sorghum, pearl millet. When wheat, after pulse crop needs 20 to 30 kg less nitrogen per hectare. Phosphatic fertilizers are added through green manure crops, not to apply phosphates to succeeding wheat crop. In rice based cropping system consisting of rice- rice in Kharif and rabi and sorghum, maize, finger millet, soybean in summer it is sufficient to apply phosphorus and potassium to summer crops only while nitrogen is applied to all the crops. Thus, following system approach in fertilizer recommendation can save lot of fertilizer.
e. Water management:
There is no carry over effect of irrigation as in case of fertilizer. Rice – rice is efficient cropping system for total yield, but it consume large amount of water especially in summer. If water is scare in summer instead of rice, groundnut is used in cropping system. Method of irrigation: The layout should be so planned that most of the crops can be suitable. In ricerice- groundnut system; rice is irrigated by flood method, while groundnut by boarder strips. In cotton – sorghum- finger millet system, cotton, sorghum by furrow method while finger millet checks – basin method is adopted. More remunerative and less water consuming crop rotations have been standardized at different locations of India. Rice- mustard-green gram, rice- potato- green gram rotation were found more water efficient systems at Memari in W.B. Under high level of irrigation in tarai region of U.P, rice-lentil and rice-wheat cropping system were found better. Pre monsoon groundnut-rabi sorghum sequence was highly remunerative with high water use efficiency compared to sugarcane alone in M.S when irrigation water is not limiting. Under limited water supply, however, rice – chickpea- green gram and rice- mustard – green gram are more remunerative with high water use efficiency.
f. Weed management:
Weed problems are observed in individual crops, weed shifts and carry over effect of weed control method on the succeeding crops is usual. Weeds are dynamic in nature, generally broad- leaved weeds occur in wheat at later stages and 2, 4 D is applied as post emergence herbicide to control them. In rice- wheat system, canary grass (Phallaris minor) is a menace for wheat crop. Seed of other species decompose and loss viability, but Phalaris minor seed do not loss viability. When sown in rice stubble, wheat is heavily infested with Phalaris minor. In zero till cotton- sorghum-finger millet, weeds are controlled by herbicide. Herbicide applied to the previous crop may be toxic to the succeeding crop. Higher dose of Atrazine applied to sorghum crop affect germination of succeeding pulse crops. Herbicide recommendation should be depends on succeeding crops, ploughing before the planting helps to kill most of the weeds.
g. Pest and Diseases:
Pest and diseases infestation more in sequence cropping due to continuous cropping. Carry over effect of insecticides is not observed.
h. Harvesting:
In sequences cropping crop can be harvested at physiological maturity stage instead of harvest maturity. The field can be vacated one week earlier. Because of continuous cropping the harvesting time may coincide with heavy rains and special post harvest operations, like artificial drying, treating the crop with common salt etc. are practices to save the produce.
Important Indices
Some of the important indices to evaluate the cropping systems are as below:
I) Land Use Efficiency or Assessesment of Land Use:
The main objective is to use available resources effectively. Multiple cropping which include both inter and sequential cropping has the main objective of intensification of cropping with the available resources in a given environment. Several indices have been proposed to compare the efficiencies of different multiple cropping system in turns of land use, and these have been reviewed by Menegay et al. 1978.
1. Multiple Cropping Index or Multiple Cropping Intensity (MCI):
It was proposed by Dalrymple (1971). It is the ratio of total area cropped in a year to the land area available for cultivation and expressed in percentage (sum of area planted to different crops and harvested in a single year divided by total cultivated area times 100).
Where:
- is the Multiple Cropping Index expressed as a percentage.
- is the total number of crops grown in a year.
- is the area occupied by the ith crop.
- is the total land area available for cultivation.
For example, if a farmer has 100 acres of land and they plant 50 acres of corn, 25 acres of soybeans, and 25 acres of wheat, then the MCI would be:
MCI = ((50 + 25 + 25) / 100) × 100 = 100%.
It is similar to cropping intensity
MCI=Aa1+a2+…+an×100
Where a1 + a2 + … +an is the gross cropped area and A the net cultivated area
The Cultivated Land Utilization Index (CLUI) can be calculated using the formula:
where:
- is the total number of crops,
- is the area occupied by the crop,
- is the number of days that the crop occupied,
- is the total cultivated land area available for 365 days.
The CLUI is expressed as a percentage and can range from 0% to 100%, where 0% indicates no land utilization and 100% indicates full land utilization. A higher CLUI value indicates a more intensive use of cultivated land.
Here's an example of how to calculate the CLUI:
Suppose a farmer has 100 acres of cultivated land and grows three crops: corn, soybeans, and wheat. The corn crop occupies 50 acres of land for 120 days, the soybean crop occupies 25 acres of land for 90 days, and the wheat crop occupies 25 acres of land for 150 days.
To calculate the CLUI, we would first calculate the product of land area and duration for each crop:
- Corn: 50 acres * 120 days = 6,000 acre-days
- Soybeans: 25 acres * 90 days = 2,250 acre-days
- Wheat: 25 acres * 150 days = 3,750 acre-days
Next, we would sum the product of land area and duration for all three crops:
Total acre-days = 6,000 acre-days + 2,250 acre-days + 3,750 acre-days = 12,000 acre-days
Finally, we would divide the total acre-days by the total cultivated land area (100 acres) and multiply by 365 days and by 100 to express the result as a percentage:
CLUI = (12,000 acre-days / (100 acres * 365 days)) * 100% = 33%
Therefore, the CLUI for this farmer's land use is 33%, indicating a moderate level of land utilization.
CLUI can be expressed as a fraction or percentage. This gives an idea about how the land area has been put into use. If the index is 1 (100%), it shows that the land has been left fallow and more than 1, tells the specification of intercropping and relay cropping. limitation of CLUI is its inability to consider the land temporarily available to the farmer for cultivation.
3. Crop Intensity Index (CII):
Crop intensity index assesses farmers actual land use in area and time relationship for each crop or group of crops compared to the total available land area and time, including land that is temporarily available for cultivation. It is calculated by summing the product of area and duration of each crop divided by the product of farmers total available cultivated land area and time periods plus the sum of the temporarily available land area with the time of these land areas actually put into use (Menegay etal. 1978). The basic concept of CLUI and CII are similar. However, the latter offers more flexibility when combined with appropriate sampling procedure for determining and evaluating vegetable production and cropping pattern data.
The Crop Intensity Index (CII) is calculated using the formula:
Where:
- is the total number of crops grown by a farmer during the time period .
- is the area occupied by the crop.
- is the duration occupied by the crop.
- is the time period under study (usually one year).
- is the total cultivated land area available with the farmer for use during the entire time period .
- is the total number of fields temporarily available to the farmer for cropping during the time period , with .
- is the land area of the field.
- is the time period when is available.
When, CII = 1 means that area or land resources have been fully utilized and less than 1 indicates under utilization of resources. CII and LER are used to assess the efficient cropping zone.
Cropping intensity/intensity of cropping (CI) indicates the number of times a field is grown with crops in a year. It is calculated by dividing gross cropped area with net area available in the farm, region or country multiplied by 100.
When long duration crop is grown, crop remains for a longer time in field. This is the drawback of CI. So time is not considered. Thus, when long duration crops like sugarcane and cotton are grown, the cropping intensity will be low.
4. Specific Crop Intensity Index:
It proposed by Menegay et al. 1978. SCII is a derivative of CII and determines the amount of area –time denoted to each crop or group of crops compared to total time available to the farmers.
The formula for SCII is as follows:
Where:
- is the total number of crops within a specific designation (e.g., vegetable crops, field crops) grown by the farmer during the time period .
- is the area occupied by the crop.
- is the duration of the crop.
- is the total cultivated land area available for use during .
- is the total number of fields temporarily available to the farmer for cropping during the time period , with .
- is the land area of the field.
- is the time period when is available.
Specific Crop Intensity Index Data
Crop | Area (ha) | Duration (months) | Area-Time |
---|---|---|---|
Sugarcane | 0.75 | 12 | 9.000 |
Rice | 0.75 | 3.5 | 2.625 |
Cotton | 0.75 | 5.0 | 3.750 |
SD Vegetable | 0.75 | 3 | 2.250 |
Total Area-Time | 17.625 |
Temporarily Available
Crop | Area (ha) | Duration (months) | Area-Time |
---|---|---|---|
Rice | 0.5 | 3.5 | 1.75 |
Vegetable | 0.3 | 4.0 | 1.20 |
Cotton | 0.7 | 5.0 | 3.50 |
Total Temporarily Available | 6.45 |
Where: total number of enterprises (crops or farm products) and yi = gross revenue of ith enterprises produced within a year.
Example: In the following which farm is most specialized?
Crops Income (Rs)
Crop | Farm A | Farm B | Farm C |
---|---|---|---|
Sugarcane | 30000 | - | 10000 |
Cotton | 10000 | 20000 | 20000 |
Wheat | 40000 | 20000 | 10000 |
Jowar | 20000 | 10000 | 40000 |
Potato | - | 50000 | - |
Total | 100000 | 100000 | 80000 |
Crops Share of Individual Crop in Different Farms
Crop | Farm A | Square of its Share | Farm B | Square of its Share | Farm C | Square of its Share |
---|---|---|---|---|---|---|
Sugarcane | 0.3 | 0.09 | - | - | 0.125 | 0.0156 |
Cotton | 0.1 | 0.01 | 0.2 | 0.04 | 0.250 | 0.0625 |
Wheat | 0.4 | 0.16 | 0.2 | 0.04 | 0.125 | 0.0156 |
Jowar | 0.2 | 0.04 | 0.1 | 0.01 | 0.500 | 0.2500 |
Potato | - | - | 0.5 | 0.25 | - | - |
Total | 1.0 | 0.30 | 1.0 | 0.34 | 1.000 | 0.3437 |
To calculate the Diversity Index (DI) for Farms A, B, and C using the provided crop income data, we'll use the formula:
where:
- is the total number of crops,
- is the income from the th crop, and
- is the total income.
For each farm, we'll calculate the Diversity Index using the given crop income data. Here are the calculations:
Farm A:
Farm B:
Farm C:
Now, let's calculate these values:
Farm A:
Farm B:
Farm C:
So, the Diversity Index for Farm C is approximately 2.91.
Now, you have the Diversity Index values for all three farms:
- Farm A:
- Farm B:
- Farm C:
Where:
- is the total number of crops.
- is the gross value of the th crop planted and harvested within a year.
To calculate the Harvest Diversity Index for each farm (Farm A, Farm B, and Farm C) using the provided crop income data, substitute the values into the formula:
Farm A:
Farm B:
Farm C:
Now, let's calculate these values:
Now, let's calculate these values:
Farm A:
Farm B:
Farm C:
So, the Harvest Diversity Index for each farm is approximately:
- Farm A:
- Farm B:
- Farm C:
7. Simultaneous Cropping Index (SCI): It is computed by multiplying the Harvest diversity index (HDI) with 10,000 and dividing the product
by Multiple cropping index (MCI). It is given by Strout, 1975.
Where:
- HDI is the Harvest Diversity Index.
- MCI is the Multiple Cropping Index.
Using the previously calculated Harvest Diversity Index values for each farm (Farm A, Farm B, and Farm C), and if you have the Multiple Cropping Index values for each farm, you can substitute these values into the formula to find the Simultaneous Cropping Index for each farm.
As an example, let's use the previously calculated HDI values:
- HDI_A ≈ 1.96
- HDI_B ≈ 2.94
- HDI_C ≈ 2.91
If you have the Multiple Cropping Index values (MCI) for each farm, you can substitute them into the formula. For instance, if MCI_A ≈ x, MCI_B ≈ y, and MCI_C ≈ z, then the SCI values would be:
Please replace x, y, and z with the actual Multiple Cropping Index values for each respective farm. The resulting SCI values will provide an indication of the simultaneous cropping intensity, with higher values suggesting a higher degree of simultaneous cropping.
8. Relative Cropping Intensity Index (RCII):
It is again the modification of CII and determines the amount of area and time allotted to one crop or groups of crops relative to area - time actually used in the production of all crops. RCII numerator equal SCII denominator and RCII denominator equal CII numerator.
These indices can be used for classifying farmers viz. when relative vegetable intensity index is 50% ,then the farmer would be considered a vegetable grower. These indices can be used for measuring shifts of various crops among farm of different sizes and determining whether the consistent types of cropping pattern occur within various farm size strata. These indices also held to know how intensively cultivated land, area has been utilized. But none of these indices takes productivity into account and cannot be used for comparing different cropping systems and evaluating their efficiency in utilization of the resources other than the land.
9. Crop Equivalent Yield (CEY):
Many types of crops/cultivars are included in a multiple cropping sequences. It is very difficult to compare the economic produce of one crop to another. To cite an example, yield of rice cannot be compared with the yield of grain cereals or pulse crops and so on. In such situations, comparisons can be made based on economic returns (gross or net returns). The yield of protein and carbohydrate equivalent can also be calculated for valid comparison. Efforts have also been made to convert the yields of different crops into equivalent yield of any one crop such as wheat equivalent yield (Lal and Ray, 1976 and Verma and Modgel, 1983). Verma and Modgel, (1983) evolved the equation for calculating wheat equivalent yield (WEY). Crop equivalent yields (CEY): The yields of different intercrops/crops are converted into equivalent yield of any one crop based on price of the produce.
The formula for calculating Crop Equivalent Yield (CEY) is provided in the text as:
Where:
- is the Crop Equivalent Yield.
- is the yield of the main crop.
- are the yields of intercrops or other crops that need to be converted to the equivalent of the main crop yield.
- are the respective prices of the main crop and the intercrops.
This formula essentially adds up the yield of the main crop () to the yields of other crops converted into equivalent yield based on their respective prices.
Indices based on Energetic approach
Energy Efficiency:
Net Energy:
Energy Productivity:
Energy Intensity (in Physical Terms):
Energy Intensity (in Economic Terms):
Here's a brief explanation of each index:
Energy Efficiency: Measures how efficiently energy is used in the agricultural system. Higher values indicate greater efficiency.
Net Energy: Represents the surplus energy available for use after subtracting the energy input from the energy output.
Energy Productivity: Indicates the amount of output (grain + byproduct) produced per unit of energy input.
Energy Intensity (Physical Terms): Reflects the energy required to produce a unit of output in physical terms (kg/ha). Lower values suggest more energy-efficient production.
Energy Intensity (Economic Terms): Relates the energy output to the cost of cultivation. It provides an economic perspective on energy use efficiency.
Economic Viability
The indicates like CEY, LER, RYT etc. give biological suitability of cropping system to an area. At the
same time, cropping system should be economically viable and profitable. Following economic indicates
can be used to evaluate profitability of cropping system.
1. Gross Returns: The total monetary returns of the economic produce such as grain, tuber, bulb,
fruit, etc. and byproducts viz. straw, fodder, fuel etc. obtained from the crops included in the
system are calculated based on the local market prices. The total return is expressed in terms of
unit area, usually one hectare. The main draw back in this calculation is that market price of the
produce is higher than that actually obtained by the farmer. Generally gross return calculated is
somewhat inflated compared to the actual receipt obtained by the farmer. 2. Net returns or net profit: This is worked out by subtracting the total cost of cultivation from the
returns. This value gives the actual profit obtained by the farmer. In this type of calculation only
the variable costs are considered. Fixed costs such as rent for the land, land revenue, interest on
capital etc. are not included. For a realistic estimate, however, fixed costs should also be included. 3. Return Per Rupee Invested: This is also called benefit-cost-ratio or input- output ratio.
Where:
- is the total income generated from the cropping system.
- is the total cost incurred by the farmer in adopting the cropping system.
- This index provides an estimate of the benefit derived and expenditure incurred by the farmer in adopting a particular cropping system. Anything above the value of 2.0 (meaning that the farmer can get RS.2 as return for every rupee invested) can be considered worthwhile.
-
4. Per Day Return:
- This is called as income per day and can be obtained by dividing the net return by number of cropping period (days).
The Per Day Return, also referred to as income per day, is calculated by dividing the net return by the number of cropping periods (days). The formula is given as:
Where:
- is the difference between the total gross return and the total cost of cultivation.
- represents the duration of the cropping system in days.
- This gives the efficiency of the cropping system in terms of monetary value. If the system is
stretched over one year, the denominator can be replaced by 365 days and per day for the whole year can be calculated.
-
No single index is capable of giving good comparison of different cropping systems. So a number of indices are used together to assess the economic viability of the system.
Where:
- HDI is the Harvest Diversity Index.
- MCI is the Multiple Cropping Index.
Using the previously calculated Harvest Diversity Index values for each farm (Farm A, Farm B, and Farm C), and if you have the Multiple Cropping Index values for each farm, you can substitute these values into the formula to find the Simultaneous Cropping Index for each farm.
As an example, let's use the previously calculated HDI values:
- HDI_A ≈ 1.96
- HDI_B ≈ 2.94
- HDI_C ≈ 2.91
If you have the Multiple Cropping Index values (MCI) for each farm, you can substitute them into the formula. For instance, if MCI_A ≈ x, MCI_B ≈ y, and MCI_C ≈ z, then the SCI values would be:
Please replace x, y, and z with the actual Multiple Cropping Index values for each respective farm. The resulting SCI values will provide an indication of the simultaneous cropping intensity, with higher values suggesting a higher degree of simultaneous cropping.
8. Relative Cropping Intensity Index (RCII): It is again the modification of CII and determines the amount of area and time allotted to one crop or groups of crops relative to area - time actually used in the production of all crops. RCII numerator equal SCII denominator and RCII denominator equal CII numerator.
These indices can be used for classifying farmers viz. when relative vegetable intensity index is 50% ,then the farmer would be considered a vegetable grower. These indices can be used for measuring shifts of various crops among farm of different sizes and determining whether the consistent types of cropping pattern occur within various farm size strata. These indices also held to know how intensively cultivated land, area has been utilized. But none of these indices takes productivity into account and cannot be used for comparing different cropping systems and evaluating their efficiency in utilization of the resources other than the land.
9. Crop Equivalent Yield (CEY): Many types of crops/cultivars are included in a multiple cropping sequences. It is very difficult to compare the economic produce of one crop to another. To cite an example, yield of rice cannot be compared with the yield of grain cereals or pulse crops and so on. In such situations, comparisons can be made based on economic returns (gross or net returns). The yield of protein and carbohydrate equivalent can also be calculated for valid comparison. Efforts have also been made to convert the yields of different crops into equivalent yield of any one crop such as wheat equivalent yield (Lal and Ray, 1976 and Verma and Modgel, 1983). Verma and Modgel, (1983) evolved the equation for calculating wheat equivalent yield (WEY). Crop equivalent yields (CEY): The yields of different intercrops/crops are converted into equivalent yield of any one crop based on price of the produce.
The formula for calculating Crop Equivalent Yield (CEY) is provided in the text as:
Where:
- is the Crop Equivalent Yield.
- is the yield of the main crop.
- are the yields of intercrops or other crops that need to be converted to the equivalent of the main crop yield.
- are the respective prices of the main crop and the intercrops.
This formula essentially adds up the yield of the main crop () to the yields of other crops converted into equivalent yield based on their respective prices.
Indices based on Energetic approach
Energy Efficiency:
Net Energy:
Energy Productivity:
Energy Intensity (in Physical Terms):
Energy Intensity (in Economic Terms):
Here's a brief explanation of each index:
Energy Efficiency: Measures how efficiently energy is used in the agricultural system. Higher values indicate greater efficiency.
Net Energy: Represents the surplus energy available for use after subtracting the energy input from the energy output.
Energy Productivity: Indicates the amount of output (grain + byproduct) produced per unit of energy input.
Energy Intensity (Physical Terms): Reflects the energy required to produce a unit of output in physical terms (kg/ha). Lower values suggest more energy-efficient production.
Energy Intensity (Economic Terms): Relates the energy output to the cost of cultivation. It provides an economic perspective on energy use efficiency.
Where:
- is the total income generated from the cropping system.
- is the total cost incurred by the farmer in adopting the cropping system.
- This index provides an estimate of the benefit derived and expenditure incurred by the farmer in adopting a particular cropping system. Anything above the value of 2.0 (meaning that the farmer can get RS.2 as return for every rupee invested) can be considered worthwhile.
- 4. Per Day Return:
- This is called as income per day and can be obtained by dividing the net return by number of cropping period (days).
The Per Day Return, also referred to as income per day, is calculated by dividing the net return by the number of cropping periods (days). The formula is given as:
Where:
- is the difference between the total gross return and the total cost of cultivation.
- represents the duration of the cropping system in days.
- This gives the efficiency of the cropping system in terms of monetary value. If the system is stretched over one year, the denominator can be replaced by 365 days and per day for the whole year can be calculated.
- No single index is capable of giving good comparison of different cropping systems. So a number of indices are used together to assess the economic viability of the system.
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