The matter cycle would stop.
soil aggregate is compressing soil together by microorganisms
Oil dilutes soil. This causes plants to die
puta ka
Xueqing Xia has written: 'The response of three soil microbial communities to the application of 2,4-D' -- subject(s): Soil microbiology, Dichlorophenoxyacetic acid, Effect of pesticides on, Microorganisms
Soil bacteria are the natural soil microorganisms that break down soil components into plant food.
Microorganisms living in the soil convert it through chemosynthesis.
They decompose dead plants and animals and nutrients to plants and the soil
The roots of the plants can break down rocks to form soil particles. They can also prevent erosion by holding the soil. Plants can add humus to the soil as They decompose returning minerals. The presence of plants aerates soil, provides shade and reduces water content as well.
Nitrite formation by rhizoplane microorganisms of rice seedlings was examined in comparison with that by nonrhizosphere paddy soil microorganisms. Effect of nitrite on root growth of rice seedlings was also investigated under aseptic water culture condition. Rhizoplane microorganisms accumulated much nitrite than the other microorganisms in a root extract medium. The accumulated nitrite maintained a stationary level for more than 2 days. In glucose enriched media, both group of microorganisms accumulated nitrite only temporarily. Formation of lateral roots and root hairs was stimulated in the solution containing 1.12-11.2 ppm NO_2^--N but elongation of primary roots was depressed under 5.6-11.2ppm NO_2^--N concentrations. Growth of rice seedlings was inhibited at concentrations higher than 5.6 ppm. Comparative studies indicated that effect of soil microorganisms on root morphology would have been caused by nitrite produced by rhizoplane microorganisms. Additional Index Words : nitrite formation, rhizoplane microorganisms, rice root, aseptic culture.
Melvin C. Allen has written: 'Sequence of activity and effect of certain specific groups of microorganisms on the decomposition of soil organic matter in Palouse silt loam ..' -- subject(s): Soil microbiology
They are present everywhere on earth. The top layer of soil is no exception.
Soil can lose its value in several ways. Two are erosion of topsoil and depletion of nutrients and microorganisms in the soil.