Nguyễn Hữu Thành (trang 9-14)
Từ khoá: kali, đất, đất xám bạc màu, Đông Anh
Potassium status of hapli plinthic acrisols in Dong Anh district, Ha Noi
61 samples from 14 representative soil profiles. The soil is hapli plinthic acrisols. K content of the soil is very low. Total K is 0.10 -0.98%. exchangeable K is 2.40 -3.98mg/100g soil. Non exchangeable K is 8.25-19.37mg/100g soil. K potential of the soil is high, 2.60-2.93. high value of K potential is indicative of K deficiency. Low PBCK soil would suggest the need for frequent K fertilization.