Relación capacidad-intensidad de potasio en suelos no fertilizados cultivados con vainilla (vanilla planifolia jacks. Ex andrews)

Although vanilla is a very profitable and demanded crop, scarce information regarding its nutrient requirements is available. Immediate available K is related to intensity factor, while reserveness of non-exchangeable K is the quantity factor. Potassium exchange-equilibrium parameters were outcome from quantity-intensity relationships. No strong differences were found on exchangeable K, but when the ratio of exchangeable K, Ca and Mg are considered two types of soils can be separated. Potassium availability depends on a sort of factors. Exchangeable energy for soil with high availability of K (3.737 kcal) contrasts with low K availability (6.876 kcal). Low capacity factor soils may release up to 390 mg kg1, but low availability soils can release up to 900 mg kg1.