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第1期充满希望的三十年····························,······~··……‘l)配方施肥技术工作要点···················‘···············,··…(6)土壤培肥与土壤肥力特征研究·············
The first full of hope for thirty years · · · · · · · · · · · · ’ l) Technical points for formula fertilization ·············································································································································· Fertilizer and Soil Fertility Characteristics ································