YIELD AND QUALITY OF 'VALENCIA' ORANGE FRUITS AS AFFECTED BY FOLIAR APPLICATION OF MAGNESIUM, MANGANESE, ZINC, AND BORON
Abstract
The experiment started in 1987 and finished in 1.990; was carried out at Estação Experimental Agronômica, Universidade federal do Rio Grande do Sul, located in Eldorado do Sul, Rio Grande do Sul —Brazil (30° 05' S, 5l"40' W). The orchard was established in 1976 and the main objective of the experiment was to evaluate fruit yield and quality of 'Valência' orange submitted to six spray fertilization treatments, with ultimate suppression of magnesium, manganese, zinc and boron. The experimental design was in randomized blocks, with five replications. Results did not show any effect on fruit yield, but there were significant effects on fruit quality. The fertilization increased the concentration of boron, manganese, and zinc in the leaaves.
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