Decreasing the denitrification rate d. Increasing the symbiotic fixation rate 221. One of the complex soil microbial processes involves their interaction with xenobiotics. Soil organisms obtain energy from organic materials by reducing carbon atoms. Mycorrhizae are a pathogenic infection of plant roots by soil bacteria.
Organic materials release nitrogen for plant uptake over an extended period.
If you added plant residue containing 200 pounds of carbon, how many pounds of carbon will be converted into soil humus is sufficient nitrogen is present. Humus has a very large specific surface area, high plasticity, and possesses a net negative electrical charge. Compared to a virgin soil, cultivated soils have more microbial activity because of more frequent residue additions. False, the activity is less because crop roots discourage microbial buildup. False, the ratio depends on the c content of the residue 280.