Nematodes are commonly known as plant root parasites, but most soil-dwelling species participate in organic matter decomposition. Non-parasitic nematodes are especially abundant when organic matter levels are high. Earthworms and other larger invertebrates influence decomposition processes, and also have significant effects on soil structural development. Soil Building Biological activity helps create stable aggregates which result in soils with better tilth and physical condition. Soil polysaccharides and iron oxides are binding agents that cause soil mineral particles and organic matter to adhere together as an aggregate.
Polysaccharides are simply carbohydrate materials produced by soil organisms.
It is thought that when we add organic matter to the soil, microbial processes and spontaneous chemical reactions produce humus. We are adding complex organic material which microbes break down to simple materials, and then further re-synthesize these to complex materials. This may account for the longevity of some fractions or parts of soil organic matter. Transition Transition to more sustainable farming practices is the basis of good pest and crop stress management. It is a preventive management strategy that may help avoid these problems.