Decaying plant residues are not the only source of P in the soil. Manure and other organic residues (e.g., biosolids, composted manures, food waste residuals) contain phosphorus in plant available ...

Nitrogen (N) and phosphorus (P) are essential nutrients for all living ... such as wastewater treatment plants, and nonpoint sources, such as agriculture and urban land uses. In Delaware, the TMDL ...

Gardeners are being urged to add one natural ingredient to the soil to improve its quality and bring about healthier plant ...

However, plants require inorganic phosphorus ... samples with different concentrations of ribonucleotides, a source of organic phosphorus. They found that different iron oxides were more effective ...