The function of binary quadric fertilizer effect has been extensively used in China to determine the optimum economy fertilizing quantity.

针对目前国内利用二元二次肥料效应函数确定最佳经济施肥量的数学方法存在的问题。

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Especially Switzerland. TanAn ammonium chloride compound series. Fill in the domestic blank. The leading domestic level, fertilizer: binary ternary, nutrients content, 25-53.

特别是瑞士。碳铵。硫酸铵氯化铵系列复肥造粒。填补国内空白居国内领先水平，复混肥：二元、三元，营养成分含量25% - 53%。

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Etc. Mix. 4. Especially Switzerland. TanAn ammonium chloride compound series. Fill in the domestic blank. The leading domestic level, fertilizer: binary ternary, nutrients content, 25-53.

特别是瑞士。碳铵。硫酸铵氯化铵系列复肥造粒。填补国内空白居国内领先水平，复混肥：二元、三元，营养成分含量25% - 53%。

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Etc. Mix. 4. Especially Switzerland. TanAn ammonium chloride compound series. Fill in the domestic blank. The leading domestic level, fertilizer: binary ternary, nutrients content, 25-53.

特别是瑞士。碳铵。硫酸铵氯化铵系列复肥造粒。填补国内空白居国内领先水平，复混肥：二元、三元，营养成分含量25% - 53%。

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