A 1400-pound cow in the second trimester of pregnancy needs 8% protein. She is fed grass hay (6% protein) and soybean meal (49% protein).

Calculate how many pounds of each feed is required to mix a 100 pound ration of feed with 8% protein.

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.