Question

wch are the 3 basic scientific approaches for increasing yield of a crop

Answer 1

by using pesticides to kill pests.
by increasing efficiency of enzime rubisco which captures carbondioxide in most plants.
by prosess of hybridization.

Answer 2

Answer:

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

Crop production management: It includes proper irrigation and nutrient management. It can be done by adding manure and fertilizers. Nutrient management can also be done by crop rotation, inter-cropping and     mixed-cropping.

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.

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

Hope it helps!

(Brainliest)