He aha nā mea kanu i hoʻohana mau ʻia i ka mahiʻai?

(1) ka nitrogen: nitrogen nutrient elements e like me ka mea nui o ka fertilizer, me ka ammonium bicarbonate, urea, ammonium pin, ammonia, ammonium chloride, ammonium sulfate, etc.

(2) p: p nā meaʻai meaʻai e like me ka mea nui o ka fertilizer, me ka superphosphate maʻamau, ka calcium magnesium phosphate fertilizer, etc.

(3) k: nā meaʻai meaʻai pālolo e like me ka mea nui o ka mea kanu, ʻaʻole nui ka noi, ʻo nā ʻano nui he potassium chloride, potassium sulphate, potassium nitrate, etc.

(4) hui pū a hui ʻia, ʻo ka fertilizer i loko o ʻelua mau mea ʻekolu o ka fertilizer (nitrogen, phosphorus and potassium) binary compound a me nā mea hoʻohuihui a me ka nitrogen, phosphorus a me ka potassium ʻekolu mau mea o ka ternary pūhui a me nā mea hoʻohuihui. ʻO ka hoʻolaha ʻana i nā mea hoʻomomona huila ma ka ʻāina holoʻokoʻa.

(5) kekahi mau mea i loko o ka trace element fertilizer a me ka fertilizer, e like me ka mea mua i loaʻa i ka boron, zinc, iron, molybdenum, manganese, copper a me nā mea ʻē aʻe trace element fertilizer, ka mea hope e like me ka calcium, magnesium, sulfur fertilizers.