Fertilizer101 Resources Ferti Quote
One of the most important resources that a garden makes available for use, is the gardener's own body. A garden gives the body the dignity of working in its own support. It is a way of rejoining the human race.
-- Wendell Berry, author and farmer

Phosphorus and Fertilizer Products

The phosphorus in most commercial fertilizers comes from phosphate rock, found in fossil remains originally laid down beneath the oceans and later lifted up with land masses. Fertilizer manufacturers mine deposits of phosphate rock to provide P for a variety of commercial fertilizer blends.

The P in fluorapatite is practically unavailable to crops in the form in which it comes “out of the mine” (although in the past, very high-grade phosphate rock was ground and applied more or less as found). Phosphorus fertilizers are generally classed as being either thermal-processed or acid-treated. The latter are considered to be more commercially important.

A Crucial Role: Soil Fertility

Land use, human nutrition and the carbon cycle form an intricate set of relationships. Healthy plants use carbon dioxide, give off oxygen and increase soil organic matter (OM), thereby enhancing soil fertility. Practices that increase organic matter can increase soil fertility while decreasing greenhouse gas emissions.

• Chart: Soil Fertility

The most widely used commercial phosphorus fertilizer products in the United States are the ammoniated phosphates, diammonium phosphate (DAP) and monoammonium phosphate (MAP). Nearly 60 percent of the P applied in 2007 was either direct application DAP or MAP. DAP and MAP are also used to provide the P in many fertilizer mixtures and bulk blends. Thus, ammoniated phosphates account for the lion’s share of total P use. Other commercially important P products include various phosphoric acids and liquid ammonium polyphosphate. Other phosphate products include normal superphosphate and triple superphosphate.

Phosphorus Potassium: A Quality Building Block


Submitted by: lora chan
October 20, 2011
I'm urgent want to purchasing potassic fertilizerfrom china.pls sent the price sheet to me.
Submitted by: BASAVARAJ
July 29, 2012

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