AP BIOLOGY

Detailed explanation-1: -In organic farming systems, phosphorus is supplied mainly through recycling of on-farm organic materials such as composts, green manures and animal manures. These organic materials contain phosphorus mineralized by soil organisms, making this macronutrient easier for plants to use.

Detailed explanation-2: -Functions of Phosphorus in Plants Phosphorus promotes early root growth, winter hardiness, and seed formation, stimulates tillering, and increases water use efficiency.

Detailed explanation-3: -Use compost, animal manure, bone meal, rock phosphate, or green manure for natural sources of phosphorus. Add it to your soil 1-2 weeks before you plant for best results. You can also add it during the growing season to give your plants a little extra oomph.

Detailed explanation-4: -The most commonly used phosphatic fertilizers are Diammonium Phosphate (DAP), Monoammonium Phosphate (MAP), NPKs, and SSP. DAP is the world’s most widely used phosphorus fertilizer. It is popular due to its relatively high nutrient content and its excellent physical properties.