Phosphorus Solubility

p solubility

pH 4.5  Event  Precipitate Formed

1. add fertilizer  soluble P added  -
2. 1 - 2  soluble P decreases  DCP
3. 2-3  DCP dissolves  FA
4. 3-4  FA dissolves  Variscite

Supersaturation of a band with respect to Ca (volcanic ash soils)

orthophosphate P

horizontal band


Phosphorus Fertilizer Carriers and Their Placement for Minimum Till Corn Under Sprinkler Irrigation.  SSSAJ, 51:1055-1062.

Banded P (University of Minnesota, George Rehm)

Dual Placement, Prairie Farmer

Broadcast Preplant versus Banded P
Maintenance versus Sufficiency (Roger Bray)
Buildup versus Maintenance

Maize Yield Response as Affected by Phosphorus, Sulfur and Nitrogen as Banded Applications on a Volcanic Ash Derived Tropical Soil. Commun. Soil Sci. Plant Anal. 22:1661-1676.

Ammonium nutrition