SUMMARY1. Tagged superphosphate was applied to 2.5 year old passion fruit plants from a commercial plantation established in a sandy loam.2. 100 grams of the fertilizer were distributed in the follow ing ways: in a circular furrow 20 cm around the plant 40 cm from the stems; in a circular strip 10 cm wide, 40 cm from the stems; in six holes around the plants, 40 cm from the stems 20 cm deep, 2.5 cm in diameter.3. 10 grams of the fertilizer in 11 of water were sprayed to the leaves.4. Three weeks after the treatments were made, leaf samples were taken for analysis.5. Determinations of specific activities both in the leaves and in the fertilizer used have shown that Ρ in the plant was derived from the superphosphate in the following relative proportions (by making the first treatment equal to 100): circular furrow = 100; circular strip = 120; holes = 30; foliar spray = 230.
Foram induzidos sintomas de carência de macronutrientes no milho, var. Piranão, exceto no caso do enxofre. Os níveis foliares de N, P, K, Ca, Mg e S foram determinados nas plantas sujeitos à nutrição completa e às deficiências de macronutrientes.
SUMMARY1 -Tagged superphosphate was applied to 2.5 year old passion fruit plants from a commercial plantation established in a sandy loam.2 -100 grams of the fertilizer were distributed in the following ways: in a circular furrow 20 cm deep around the plant 40 cm from the stems; in a circular strip 10 cm wide, 40 cm from the stems; in six holes around the plants, 40 cm from the stems 20 cm deep, 2.5 cm in diameter.3-10 grams of the fertilizer in 1 l of water were sprayed to the leaves.4 -Three weeks after the treatments were made leaf samples were taken for analysis.5 -Determinations of specific activities both in the leaves and in the fertilizer used have shown that Ρ in the plant was derived from the superphosphate m the following relative proportions (by making the first treatment equal to 100): circular furrow = 100; circular strip = 120; holes = 30; foliar spray = 230.
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