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)
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.
