Improved management of phosphorus (P) from both manure and fertilizer sources is important because of surface water quality concerns. This study considers possible P loss via leaching through the soil and examines the dynamics of the adsorption/extraction process.
To what extent does the lateral movement of water to drain tubes through P-deficient subsoils result in P "extraction" from that water?
Despite the possibility of quick vertical movement of P in water percolating down to the water table from the soil surface, P concentrations in tile drainage are much lower than in the percolating water due to subsoil extraction. Based on the estimates of amounts of flow and soil P levels, it is predicted that the subsoil extraction process can be a beneficial factor for several decades, if not longer.
James L. Baker
Antonio P. Mallarino, Stewart W. Melvin
Year of Grant Completion
Baker, James L.; Mallarino, Antonio P.; and Melvin, Stewart W., "Understanding the potential of phosphorus transport to water resources via leaching" (2004). Leopold Center Completed Grant Reports. 213.