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Controlled Release Fertilizers

According to Trenkel (1997), slow- release fertilizers (SRF) or controlled-release fertilizers (CRF) are those containing a plant nutrient in a form, which either (a) delays its availability for plant uptake and use after application (SRF), or (b) is available to the plant significantly longer than a reference “rapidly available nutrient fertilizer” (CRF). Controlled release fertilizers are granulated […]