1) Nitrogen is often a limiting factor in plant growth. Explain what is happening in the nitrogen cycle diagram from point D to E to make nitrogen usable to plants. 0) Ammonium (NHL) in the soil from sources such as A) decomposition and wastes are transformed into nitrate (NO3) by nitrifying bacteria. Nitrates (NO3) in the soil from sources such as

B) decomposition and wastes are transformed into Ammonium (NH2') by nitrifying bacteria.

C) Nitrogen gas (N.) from the atmosphere is dissolved into the soil where it is converted into Nitrites NO, by nitrifying bacteria in plant nodules. Nitrogen gas (N2) from the atmosphere is dissolved

D) into the soil where it is converted into Ammonium (NH4+) by nitrifying bacteria in plant nodules​