Fig. 4. Soil test P (Mehlich 1; 0- to 15-cm line) and flow-weighted concentration of DRP (bars) between soil samplings (error bars indicate standard deviation; down arrows indicate broiler litter applications).
Fig. 4. Soil test P (Mehlich 1; 0- to 15-cm line) and flow-weighted concentration of DRP (bars) between soil samplings (error bars indicate standard deviation; down arrows indicate broiler litter applications).