ahsan riaz 2008-ag-1811 crop rotation it is a technique of growing different crops on a same land...
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AHSAN RIAZ2008-ag-1811
CROP ROTATION
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It is a technique of growing different crops on a same land over a definite period of time in such a manner so that the fertility of the soil is least effected and profit is maintained
CROP ROTATION
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Why C.Rotation is necessary?
Monoculture For sustainability Weed infestation Reduce soil erosion Maintain soil Biota IPM
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Duration of Rotation:
Rotation sequance or patterns could be of duration
ranges from 1---3 years. This may include at least one
cover crop and legume
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Two crops on the field in a year
Maize ------ WheatRice ------ Wheat Cotton ------ Wheat Rice ------ Berseem Rice ------ Field beans
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Three crops on the field in a year
Maize---- Wheat ------Mash Rice -----Wheat------Green grams
Four crops on the field in a yearCabbage -----cauliflower-----Onion-----Maize
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Principles of C.rotation
1. Crop of same family and same root system should not followed after each other.
2. Long duration crop followed by short duration crop.eg. S.cane----Peanut.
3. Exhaustive crops should be followed by restorative crops.eg cereals-----legumes.
4. Anaerobic crops followed by aerobic crops. e.g. Rice----wheat
5. Susceptible crops to must replaced by resistant crops.
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6. Green manuring crops should succeed
grain or other crop.eg) Mung bean-----wheat
7. Crops requiring more and deep tillage should be followed by other crops to save labor
e.g. cotton---berseem
8. Rotation should supply food grains and feed
9. Crops in rain fed /barani /drought prone areas should succeeded by fallowing.
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Advantages of C.rotation
Maintain soil fertility Improves physical condition of soil Minimizes risk of plant diseases/insects Provides vegetative cover to the soil and
prevents erosion by rains/floods and winds
Rotation cover the natural and market risks and avoids sudden failure
Better utilization of labour and other resources and help in regular flow of income
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Rotation Planning
Farm resources (water, labor and capital) Available technology i.e. good seeds and
equipments Farm enterprise i.e. dairy/poultry farming The commodity market and price Transportation facilities (roads, trucks) Managerial skills and staff for farm
operations Farmer’s needs
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Cont…...
Goals of farmers, that could be more profit, pest control, risk coverage
Government policies and intensives i.e. subsidy/loans
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Factors effecting C.Rotation
Natural environmental condition Type of soil Availability of fertilizers Availability of labor Irrigation Situation of farm Size of farm Weeds Market price
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