University of Delaware4y
Phosphorus Management Strategies for Delaware’s Agricultural Soils: The Phosphorus Site Index
The P application rate is then multiplied by a Phosphorus Source Coefficient (PSC; Table 3) to account for differences in P solubility and plant availability between organic P sources. The default PSC ...
Dal8y
Searching for Ways to Add Phosphorus to Increase Soil Fertility
The challenge for organic farmers is to improve plant uptake of phosphorus – an element and one of three ... In the study, chemically untreated phosphate rock from sedimentary and igneous sources was ...