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These are oxidized into humic acids when exposed to oxygen. If sunlight then shines on the humic substances, hydrogen peroxide is formed. Hydrogen peroxide inhibits the growth of algae, but has no effect on existing algae.
Worms can eat their body weight daily in organic matter and convert it into dark, soil enriching castings full of live micro organisms, growth hormones, and nutrients, humic acids which condition the soil, and a neutral pH.
A brew of microbes feeds on dead plant tissue in the thatch layer, reducing thatch by half with just three applications at four-week intervals. Finally, humic acids and soil fungi promote soil fertility and plant growth.
 See also: Gardening, Gardener, Produce, Plant, Vegetable
  
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