Phosphates

DAP is the most widely used phosphate fertilizer among growers today. It is manufactured by reacting phosphoric acid and ammonia and contains two ammonia molecules. In alkaline soil conditions, one of the ammonia molecules in DAP will revert to ammonia, making it an excellent fit for low pH or alkaline soil. DAP itself is alkaline with a high pH, exceeding 7.5.

Completely water soluble, MAP is generally applied in the granular form and used in the formulation of suspension fertilizers. Though it is also available as a powder, the granular material mixes well and frequently serves as an ingredient in bulk-blended fertilizers. With its low pH levels, MAP is best used for high-alkaline soils. It is an ideal starter fertilizer because MAP contains less ammonia-nitrogen than DAP, reducing potential seed damage.

Completely water soluble, MAP is generally applied in the granular form and used in the formulation of suspension fertilizers. Though it is also available as a powder, the granular material mixes well and frequently serves as an ingredient in bulk-blended fertilizers. With its low pH levels, MAP is best used for high-alkaline soils. It is an ideal starter fertilizer because MAP contains less ammonia-nitrogen than DAP, reducing potential seed damage.

Powdered MAP is available from Mosaic. Please contact a sales or customer service representative for purchasing and specification information.