选择背风向阳、排灌方面、土质疏松土层深厚的苗床，增施混合均匀的有机肥、磷肥、土肥。
Select the Leeward Sunningdale, drainage and irrigation, soil layers deep seedbed osteoporosis, increased use of organic fertilizer mixed evenly, phosphate fertilizer, soil and fertilizer.
然后采用“311—a”最优混合设计，研究碳酸钙、钙镁磷肥、胡敏酸组合配比对治理土壤镉污染的效果。
And then, "311-a" optimum compound design was used to study on remediation of cadmium contaminated soil with calcium carbonate, calcium magnesium phosphate and humic acid.
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