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| Clay-All-Over posted: "The sulfur in gypsum will react with nutrients in your soil and knock them off the clay particle creating energy. Energy is what makes your crops grow, not any one nutrient alone. It's the interaction of nutrients which gives off energy which makes things grow. It's not the actual nitrogen that makes your corn grow, it's the reaction with other nutrients in the soil which create energy and heat."
-- This is misleading and false (sorry, Clay-All-Over, but fidelity to science and truth prompts me to state this). All the energy for crop growth comes from sunlight and is captured via photosynthesis, creating sugars in the plant. The chemical bonds of the sugars are broken in other parts of the plant, releasing energy. Chemical reactions in the soil are only important for supplying nutrients to roots and otherwise creating an environment that is conducive to root growth (e.g., tolerable pH, adequate oxygen, etc).
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P, K and LIme Question
