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Crop Variety Improvement➫ The development of plants with better agronomic & disease resistant characters to increase the yeild per acre.
❱ The different strains should be able to show maximum productivity under any diverse condition.
❱ It can be done either by hybridisation or by introducing a gene.
➧ The crop variety improvement required because:-
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❱ It reduces the cost of crop production.
❱ It allows the farmers to grow multiple crops in a year.
❱ It increase the productivity of the crop.
❱ To improves quality in the crop production.
❱ To change in maturity duration.
❱ It helps in stabilising the crop production under different environmental conditions.
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Thanks...✊
QUESTION2 :
Composite fish culture is a method in which five or six different types of fish species are grown together in a single fish pond. Fish with different food habitats are selected so they don't fight with each other for food. ... Such a system improves the fish yield.