1. Izigaba zokuthekelisa kukamanyolo wamakhemikhali Izigaba eziyinhloko zokuthunyelwa kukamanyolo wamakhemikhali aseShayina angaphandle zihlanganisa umanyolo we-nitrogen, umanyolo we-phosphorus, umanyolo we-potash, umanyolo oyinhlanganisela, kanye nomanyolo we-microbial.Phakathi kwazo, umanyolo we-nitrogen uwuhlobo olukhulu lwamakhemikhali ...
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