Tuatahi, kia titiro tatou ki nga rauemi mata e whakamahia ana mo te hanga tongi puhui: 1) tongi Nitrogen: te haukinia pūhaumāota, te haukinia pūkawa ngāwha, te haukinia pūkawa ngāwha, te ammonium sulfide, te Urea, te konupūmā pākawa, me ētahi atu. etc. 3) Phosphat...
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