Distribution and chemistry of phosphorous in an albaqualf soil after 82 years of phosphate fertilization
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Abstract
The distribution of phosphorus in a fertilized and unfertilized Mexico silt loam soil was measured. After 82 years of phosphorus fertilization the added phosphorus was found in Ap (0-23 cm), smaller amounts in the A and B, and B2 (23-86 cm), and large amounts in the B3 and upper C (86-137 cm) horizons. No added phosphorus was found below 137 cm. The distribution of added phosphorus was similiar to that of the original phosphorus in the soil profile. The phosphorus adsorption capacities of fertilized and unfertilized soils were similar. These data indicated that 82 years of phosphorus fertilization nearly doubled total phosphorus content in the soil but did not change the ability of the soil to adsorb additional phosphorus. Ion products indicated that the phosphorus level in the soil solution was controlled by the solubility of strengite. Apparently those: factors which influence the solubility of strengite will influence the movement of phosphorus in the Mexico silt loam, soil.
This material is based upon work supported by the U.S. Geological Survey and the Missouri Water Center under the Grant/Cooperative Agreement.
The views and conclusions contained in this document are those of the authors and should not be interpreted as representing the opinions or policies of the U.S. Geological Survey or Missouri Water Center. Mention of trade names or commercial products does not constitute their endorsement by the U.S. Geological Survey or Missouri Water Center.
This material is based upon work supported by the U.S. Geological Survey and the Missouri Water Center under the Grant/Cooperative Agreement.
The views and conclusions contained in this document are those of the authors and should not be interpreted as representing the opinions or policies of the U.S. Geological Survey or Missouri Water Center. Mention of trade names or commercial products does not constitute their endorsement by the U.S. Geological Survey or Missouri Water Center.