Retrieving "Soil Monograph" from the archives

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1. Humus

   Linked via "soil"

   Humus plays a crucial role in soil fertility, primarily through its capacity to store and slowly release nutrients. While the nutrient content within the humic matrix itself is relatively fixed, its structure facilitates essential biological processes.
   Cation Exchange Capacity ($\text{CEC}$): Humic substances possess numerous carboxyl ($\text{–COOH}$) and phenolic ($\text{–OH}$) functional groups that ionize at typical soil $\text{pH}$ levels. This results in a high negative charge density, a…