Choyamba, tiyeni tione zinthu zomwe zimagwiritsidwa ntchito popanga feteleza wapawiri: 1) Feteleza wa nayitrogeni: ammonium chloride, ammonium sulfate, ammonium sulfide, urea, calcium nitrate, etc. 2) feteleza wa potaziyamu: potaziyamu sulfate, phulusa la udzu, etc. 3) Phosphat...
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