In developed countries, the most recent increases in agricultural productivity have come from?

Question

A. irrigation in arid areas.

B. clearing rainforests.

C. an increase on the land being used for agriculture, especially in developed countries.

D. new crop varieties and intensified farming.

Answer 1

The answer should be D, but it is way short of correct.

Answer 2

D.  Roundup Ready corn, Roundup ready soybeans, Roundup Ready alfalfa

Answer 3

All of the above are correct in their own right and in particular regions, but the one that is right across the board is D.  

Many areas are having new crops being introduced that are not native.  In order to grow the new varieties, more intensive practices have to be used to combat new insect pests, soil moisture conditions, climate, and general management.

Answer 4

Land after clearing forests is mainly used for industries and residential purpose. And there is no increase in agri land instead there is decrease in cultivable land and is used for SEZ, MIDC or residential purpose. Thats why I feel that its due to hi-breed varieties, intense and INDUSTRIAL farming  and better use of irrigation alongwith advances in inputs like pesticide and plant growth promoters.

Answer 5

your answer is D but there are many other factors that contribute to increases in agricultural productivity