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– Soil type (e.g., sandy or clay) – Soil pH – Soil texture (i.e., particle size distribution) – Soil organic matter content – Soil temperature – Soil moisture content – Available Phosphorous in the soil – Available N and K in the soil – Excess P (if any) in the soi
Inorganic Phosphate Organic Phosphates Polyphosphate
– Nitrogen – Ammonium – Phosphoru – Sodium – Potassium – Magnesium – Calcium