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Special classification of crops

Arable crops  :  which require preparatory tillage e.g. potato , tobacco , rice , sugarcane ,maize etc.
Alley crops  :  such arable crops which are grown in alley/ passages formed by trees or shrubs , established mainly to hasten soil fertility restoration , enhance soil productivity and reduce  soil erosion. e.g. sweet potato , urd , turmeric , ginger are grown in the passage formed by th rows of Eucalyptus , subabool , cassia.
Augmenting crops  :  such crops are grown to supplement the yields of the main crops e.g. Japanese mustered with berseem.
Border crops  :  such crops help to product another crops from trespassing of animal or restrict the speed of wind and re mainly grown  as border e.g. safflower is planted around the field of chick pea.
Cash crops  :  such crops are grown for sale to earn hard cash e.g. Jute Cotton Tobacco Sugarcane.
Catch crops :  Such crops are cultivated to catch the forthcoming season when crop is failed e.g. Green gram , urd , cowpea ,onion ,radish etc
Commercial crops  :  such crops are grown for earn money e.g. Jute , cotton  tobacco .
Cover crops  :  Able to product the soil surface from erosion through their ground covering foliage e.g. lobia , groundnut ,urd
Ley  crops  :  Any crops or combination of crops is grown for grazing or harvesting for immediate or future feeding to livestock e.g. berseem ,mustered .
Nurse crop : such crops help in the nourishment of other crops by providing  shade and acting as climbing sticks e.g. rai in peas , jowar in cowpea .
Silage crops : such crops are grown to preserve in pits in succulent condition by a process  of natural fermentation or accidification for feeding livestocks during lean month or offseason e.g. cowpea , jowar etc.

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