Nutrient requirements of avocado vary according to variety, spacing and soil type. Before fertilizer application, the basin should be weeded and the fertilizer broadcast but not within 30cm radius of the trunk. After applying fertilizer, irrigation is useful if soil moisture is not adequate. Though it is difficult to specify exact dose common to all soils and varieties, a recommended fertilizer dose is given in Table 1.

While, P and K deficiencies are less conspicuous, N and Ca levels in leaf markedly influence yield, fruit size and postharvest quality. The Mg, B and Fe are also important. The growers are advised to get the soil tested and consult soil specialist for specific recommendations. In California, healthy leaves of avocado Fuerte, have been reported to contain 1.8% N, 0.15% P, 1.5% K, 2.2% Ca, 125 ppm Fe, 50ppm Mn, 50 ppm Zn and 45ppm B.