what is relation between nutrient availability in the soil and nutrient response in rice yield?

Question

it is related to agriculture particularly in rice. it deals with nutrient status in cultivated soil and response of the crop in yielding

Answer 1

If I'm not wrong, the two are directly proportional - the more the nutrients in the soil, the more they would favour plant growth by the synthesis of proteins and hence better and greater yield.
But I think this would go on till a certain point ( it might be the saturation point or something). I mean, if your bestow the soil wholly with more minerals and nutrients than the plants need, it won't give you more yield, because then the yield rate will be limited by other factors such as light and carbon dioxide. If you then increase the latter two factors, then the yield will increase again.

[Again, I'm not sure about this....someone please correct me if I'm wrong!!]

EDIT: Ah, there you go.....Fred gave a more thorough explanation.

Answer 2

If the nutrients, especially trace minerals, are not available in the soil, then they cannot be in the crop.

Different varieties respond differently.
those produced in the "green revolution" need high agro-chemical inputs and provide a lot of grain, but there are likely to be deficiencies in the micro-nutrients. Any crop disease that is more likely to attack these weaker plants is dealt with by more agro-chemicals.

This is the basis of "organic" farming which starts from the premis that a healthy soil = healthy plants = healthy people.

You might also like to consider the availability of fish & prawns in a paddy field