LONG-TERM MANURE APPLICATION EFFECTS ON NUTRIENT-UPTAKE BY BARLEY

Effects of long-term applications of high rates of animal manure on plant-availability of nutrients, especially micronutrients, have not been adequately addressed. Our study indicates high rates of P applied via manure do not suppress uptake of Cu and Zn by barley but, at higher than recommended manure rates, uptake of Ca may be inhibited, perhaps through increased salinity.