Question

In what forms do nitrogen, phosphorous and potassium exist in NPK fertilizer? plz fast

Answer 1

Nitrogen, phosphorus, and potassium in NPK Fertilizers share a certain ratio depending on the percentage composition of each of the elements in the fertilizer produced. For example, an NPK 15 15 15 fertilizer has a 15% nitrogen in the fertilizer's make up, 15% potassium and 15% phosphorus in the fertilizer.

So generally, the ratios just depicts their percentage composition in the fertilizer.

Answer 2

Forms of Nitrogen, Phosphorus and Potassium in NPK fertilizer

The sources of these three macronutrients in NPK fertilizers can be inorganic as well as organic.

Nitrogen

Inorganic

• Urea
• Urea Ammonium Nitrate (UAN)
• Anhydrous Ammonia

Organic

Manure, compost, blood meal, feather meal

Phosphorus

Inorganic

• Phosphate rock (crushed/granulated)

Organic

Manure, compost, biosolids, blood meal, bone meal

Potassium

Inorganic

• Potash (refined)
• Potassium sulfate
• Langbeinite (potassium magnesium sulphate)
• Granite dust.

Organic

Manure, compost, biosolids, wood ash