Which of these methods were part of the green revolution’s efforts to increase productivity? select all that apply.

breeding superior types of grains
use of machinery
use of irrigation
use of fertilization
emphasis on single crops
soil conservation
avoidance of pesticides

ANSWER: (1) Breeding superior types of grains, (2) use of machinery, (3) use of irrigation, (4) use of fertilization.

The Green Revolution starting in the 1940s in Mexico was the renovation of agricultural practices, directed to focus on massive crops yields, and was later spread worldwide.

Some of its techniques included the breeding of superior types of grains (high yield varieties) which were insensitive to day length and grew faster with fertilizers' help, leading to an increased production per unit of land area; reliance on pesticides, herbicides, machinery and new techniques of irrigation which allowed to store water and sent it to drier areas. Though its practices were successful in terms of more production, a very common problem was the lack of care toward the soil.

the answer is a, salt plain