土壤有效磷的测定 碳酸氢钠浸提-钼锑抗分光光度法
SoiI quality-determinat ion of avaiIab le phosphorus-sodium hydrogencarbonate solution-mo-sb anti spectrophotometr ic method
SoiI quality-determinat ion of avaiIab le phosphorus-sodium hydrogencarbonate solution-mo-sb anti spectrophotometr ic method