Question

pls answer the 12th question

Answer 1

Answer:

Three basic scientific approaches for increasing the yield of a crop are :

1) Crop production management ⇨It includes proper irrigation and nutrient management and fertilizers. Nutrient management can also be done by crop rotating , inter - cropping and mixed - cropping .

2) Crop protection management ⇨ Plants need protection from weeds , insects , pests and pathogens . It can be done through mechanical methods , biological methods, chemical methods or cultural methods.

3) Cropvariety management ⇨

Crop variety can be improved by hybridisation or by transgenic measures. It can be done by obtaining desired plant characteristics.

Explanation: