PHOSPHORUS FRACTIONS IN SOIL AMENDED BY MANURE, INORGANIC AND BIO NITROGEN FERTILIZERS UNDER VARIOUS INCUBATION PERIODS

Document Type : Research articles

Authors

• M. Y. Khalafalla
• Y. A. Sayed

Soils and water Department, Faculty of Agriculture, Al-Azhar University, Assuit, Egypt.

Keywords

• labile organic P
• soil organic matter
• available P
• nitrogen fertilizer