Fertilaid

Fertilaid a matsayin Fertilizer (samarwa ta ƙare a 1992)  Fertilaid, na ɗaya daga cikin masu ba da takardar shaidar farko da California Certification of Organics ta amince da su,  a cikin 1979. Tsarin kasa da kasa don takaddun shaida bai fara wanzuwa a Amurka ba har zuwa 1990  bisa ga Dokar Abinci ta Kasa. Kafin wannan, an ba Fertilaid lambar yabo, a watan Janairun shekara ta 1954, ta farko Patent Office Citation.

John C. Porter, Sr., (an haife shi a shekara ta 1909 - ya mutu a shekara ta 2008), ne ya kirkiro wannan samfurin, tare da matarsa Fedil C. Porter (an haifa shi a shekara) a gefensa. Mista Porter, wanda masanin ilimin gona ne kuma masanin kimiyyar ƙasa, ya yi samfuran bisa ga falsafar cewa mutum yana aiki tare da yanayi, ba a kan shi ba; saboda haka, tunda an yi ƙasa ta halitta, ya kamata a warkar da shi ta hanyar fahimtar hanyoyin yanayi sannan a taimaka da tallafawa tare da samfuran da aka yi ta halitta. Tun a cikin shekarun 1950, Porters sun tsaya a bayyane da kuma jama'a game da yawan amfani da taki da magungunan kashe kwari da aka samo daga sinadarai.

 Manazarta 

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