Agriculture has a serious system, including knowledge of physics, ecology and chemistry.
There are 17 well-know elements for crop growth.
Macro-element C, H, O
Essential elementN P K
Middle element Si Ca Mg S
Micro-element Fe B Cu Mn Mo Cl Zn
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The Macro-elements constitute the body of the plant. The Essential elements become the stable food of the plant. The Middle elements are the meat, and the Micro...