function of ammonification and nitrification

so for question 1 part 3, it asks about how do these two reactions influence plants grow where can i get more information about that? But basically i know they provide nutrients to plants and influence the soil ph.

Assuming that you are referring to the problem set #3, you should start the answer by defining the 2 terms, and then elaborate on their outcomes and how those outcomes impact plant growth. Your suggestions are going in the right direction...