Question

What are the major reasons for declining rice and wheat yield in the cropping system? How crop diversification is helpful to stabilize the yield of the crop in the system?

Answer 1

Well, there are various reasons for declining of the rice and wheat cropping system
These are the intensive crops so use most of the nutrient in the soil thus result in the reduced nutrient  result in more declining yield.
Also the regular cultivation of these crops causes the degradation of the soil quality result in the low yield as the cropping become difficult .
Moreover, the  more and more strain of microorganism causing the diseases are produced as they become more resistant.
The low use of the quality seeds or the lack of disease resistance varieties can be the cause of this.