D. nitrifying bacteria
Nitrifying bacteria convert ammonium (present in nitrites) into nitrites, and then into nitrates, which are the preferred form of nitrogen for plants. By adding nitrifying bacteria to the soil, the farmer can increase the concentration of nitrates in the soil, promoting better plant growth and productivity.
The image shows the nitrogen cycle on a farm.
Plants require nitrogen to grow, but they preferentially absorb nitrogen in the form of nitrates. Typically, soils with higher levels of nitrates have better plant growth and higher levels of productivity.
A farmer finds that his soil has high levels of nitrites but low levels of nitrates. What could the farmer add to the soil to most directly increase its concentration of nitrates?
A.
denitrifying bacteria
B.
decomposers
C.
nitrogen-fixing bacteria
D.
nitrifying bacteria
1 answer
1 answer