Long-term manure application effects on nutrient uptake by barley

Abstract

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. Key words: Feedlot manure, micronutrients, Ca uptake