Soil borne diseases Management

Soil management by organic methods will almost reduces most of the diseases and improves the diversity of microbes in the soil. If you take one spoon full of forest soil with high organic matter it contains 600 to 800 million bacteria, 5000 species of fungus, and 20-30 species of beneficial nematodes. Heavy application of chemical fertilizers has drastically eroded the diversity and harmful microbial population has increased.

Soils with high organic matter content:
Generally if you take healthy soil with high organic matter the beneficial microbial population would be more and they’ll suppress the growth of the harmful microbes

Soils with less organic matter content:
This situation would be reverse in case of soils with less organic carbon, heavy chemical fertilizer applied fields. There would be less beneficial microbes and harmful microbes would be more ultimately leading to a sick soil.
So application soil organic amendments increases the diversity ultimately the soil becomes healthy. The beneficial microbes suppress the growth of the harmful microbes and finally the soil would be healthy without diseases. Some of the beneficial microbes release some toxins that would suppress the growth of the harmful microbes in the soil