Packaged fertilizer elements

作者: Wayne Arny Louis , Stevens Henry W

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参考文章(7)
Fay Temple, Plant activating device ,(1933)
George Van Yahres, Soil treating cartridge ,(1933)
Linus H Jones, Article for plant nutrition ,(1935)
Linus H Jones, Fertilization of plants ,(1933)
Martin Richard, Harry T Bellamy, Method and means for ventilating and fertilizing soil ,(1941)
Frederick G Dokkenwadel, Insecticidal-fertilizer cartridge. ,(1909)