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第1期棉花接种VA菌根的效应初报············一·······……(47}内生菌根对积壳生长的作用···,·················……(封3)黄淮海平原不同土壤小麦氮、磷最佳用量的研究…(1)硫磷铝铅矿用作磷肥的研究················
Effect of first inoculation of VA mycorrhiza on cotton I. ·························································································································································································································································································································. (Feng 3) Study on the Optimum Amount of Nitrogen and Phosphorus in Different Soil Wheat in Huang-Huai-Hai Plain (1) Research················