Yu, Li-zhi; You, Hai-xia; Wang, Gan; Sun, Xue-yan - In: Asian Agricultural Research 04 (2012) 10
available potassium, and the input of chemical fertilizer in apple orchard, we survey 25 peasant households' input of chemical … potassium in soil is 1: 1.32: 3.37). It indicates that the overall level of input of chemical fertilizer in apple orchard is … fertilizer in apple orchard, and collect soil samples for measuring and analysis. The results show that the average input of …