Effect of NPK (nitrogen, phosphorus, potassium) fertilization and application of some soil amendment agents on 3.- Soil physical and chemical properties and leaf mineral content of Valencia and Washington navel orange varieties [Egypt]

Adding gypsum and sulfur, markedly improved most of soil physical and chemical properties. Horse bean residue, had a little effect on soil chemical properties, but was more effective than gypsum or sulfur for improving soil porosity. Leaf nitrogen content, was insignificantly increased by increasing...

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Published inJournal of Agricultural Research, Tanta Univ. (Egypt) Vol. 15; no. 2
Main Authors Zayan, M.A. (Tanta Univ., Kafr-El-Sheikh (Egypt). Faculty of Agriculture), Morsy, E.S, El-Hamady, M.A, Dawood, S.A
Format Publication
LanguageEnglish
Published 1989
Subjects
ABONOS FOSFATADOS
ABONOS NITROGENADOS
ABONOS POTASICOS
EGIPTO
EGYPTE
ENGRAIS AZOTE
ENGRAIS PHOSPHATE
ENGRAIS POTASSIQUE
FEUILLE
HOJAS
METHODE D'APPLICATION
METODOS DE APLICACION
ORANGEQUAT
PROPIEDADES FISICO-QUIMICAS SUELO
PROPRIETE PHYSICOCHIMIQUE DU SOL
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Summary:Adding gypsum and sulfur, markedly improved most of soil physical and chemical properties. Horse bean residue, had a little effect on soil chemical properties, but was more effective than gypsum or sulfur for improving soil porosity. Leaf nitrogen content, was insignificantly increased by increasing nitrogen levels and was always more than optimum level in the leaves of both orange varieties. Adding gypsum or sulfur to (NPK) fertilizers, was the most effective on leaf mineral content of both orange varieties and as a result, Fe, Mn, and and Cu were significantly reduced. On the other hand, horse bean residue did not decrease the concentration of those nutrients.
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