he decreased use of can help lead to sustainable agriculture. a. conservation tillage practices b. pesticides c. biomass energy d. all of the above

true, i don't really know what you're asking but from the info you provided im guessing the answer is true.

the areas around the equator

step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.