Potassium Status in Barnyard Manure,Crop Residue and Green Manure and Their Capability of Supplying Potassium to Soil and Crop
Zhou Xiaofen, Zhang Yancai, Li Qiaoyun, Bu Fengji
ACTA AGRICULTURAE BOREALI-SINICA . 1999, (4): 83 -87 .  DOI: 10.3321/j.issn:1000-7091.1999.04.016