Heterotrophic organisms use light as an energy source to produce an energy rich carbon source for autotrophs. N ratio of humus is independent of the organic matter content 138. N ratio of the residue c. decrease the denitrification rate 140. Some microbes produce compounds that lower crop production. What compound can soil organisms oxidize to obtain energy.
Humus molecules have a very high specific surface area and possess a net negative electrical charge.
Mycorrhizae organisms use light as an energy source to produce energy rich carbon compounds for autotrophs. False, made true by changing the first word to 'Heterotroph' d. N ratio where there is just enough nitrogen for maximum humus formation, but not any excess. Nitrogen b. Potassium c. Immobilization d. denitrification 163.