Fungi, glue and risky soils

Article Abstract:

The ideal soil structure for planting consists of aggregated particles that allow adequate aeration, easy absorption of water and offer enough room for growth of roots. The aggregation of clay colloids, silt and sand grains can only be achieved through the slimy secretions produced by bacteria and fungi. Tiny arthropods, worms and nematodes take care of the necessary spacing in between the aggregates. Compacting and excessive use of chemicals would kill these organisms. Also, these organisms would die if they do not get enough nourishment from organic matter, resulting in unhealthy soil.

Soil absorption and adsorption, Absorption, Soil science, Soil ecology, Soil productivity

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Probing the origins of anaerobic conditions

Article Abstract:

The conditions in which anaerobic conditions can occur in compost or soil are discussed. The situations are excess accessible food, compaction and saturation of pores. In the first case, the presence of food high in sugar and nitrogen causes bacteria to grow very fast which depletes oxygen, resulting in anaerobic bacterial growth. In compaction, there is no space for oxygen to diffuse so that only anaerobic bacteria can grow. Saturation of pores is a condition wherein compost pile pores are filled with water resulting in the slower diffusion of oxygen.

Soils, Soil analysis, Anaerobic bacteria

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Replacing methyl bromide with compost

Article Abstract:

Compost can replace methyl bromide as a means to control diseases in agricultural land. Methyl bromide was first used in the 1950s as a means of controlling fungal diseases and nematodes in the soil. With every passing year, however, its effectivity in killing fungi and nematodes decreased and it killed off the beneficial organisms that helped prevent and control diseases. The use of compost will bring back soil health through the presence of predators and competitors which inhibit the spread of diseases and other bad organisms.

Agricultural chemicals, Soil fertility

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