FIELD: fertilizers.
SUBSTANCE: invention relates to a phosphorus fertilizer with prolonged effect that comprises phosphorus source and iron source. At least 10 wt.-% of phosphorus in fertilizer is water-insoluble matter but it is soluble in neutral ammonium citrate. Fertilizer is prepared in form of granules or tablets. Also, invention relates to a method for feeding acid, iron-depleted forest soils by addition of the indicated fertilizer along the soil. Fertilizer is added by centrifugal method preferably. Using the fertilizer prevents leaching phosphorus based on presence of iron in its with simultaneous controlling the soil acidity.
EFFECT: improved preparing method, valuable properties of fertilizer.
14 cl, 5 tbl, 1 dwg, 2 ex
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