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Title: Availability of manganese in calcareous soil of Saudi Arabia
Authors: Al-Mustafa, Wagih A.
Keywords: Calcareous soil
Issue Date: 1992
Publisher: King Saud University
Citation: Journal of King Saud University, Agricultural Sciences: 4(1); 127-138
Abstract: A total of 96 surface soil samples were collected from four major agricultural areas in SaudiArabia to determine Mn availability in soils and Mn content of crops grown on these soils. Visual Mn defi-ciency symptoms were not observed in any of the crop samples and Mn concentrations in crops were adequate by accepted criteria. About 15 and 35% of the soils extracted with DTPAand NH4OAc, respec-tively, were considered deficient while less than 1% were deficient according to criteria for the NH4HCOrDTP A extract. The level of Mn extracted by different extractants increased with increases in organic matter, silt and clay content but decreased with increases in CaCO3 content, soil pH, Ca+Mg/K and FelMn ratios. Extractable Mn was the lowest in Oassim and Riyadh areas as these soils were Iow in organic matterand high in CaCO3 content. Correlation between extractable Mn and Mn concentration in various crops decreased in the following order: DTP A > NH4HCOrDTP A > NH4OAc. Inclusion of pH, Ca + Mg/K and CaCO3 content in prediciton equations for each soil test improved the correlation between extractable Mn and concentration in plants.
Description: Soil Science Department, College of Agriculture, King Saud University, Riyadh, Saudi Arabia.
URI: http://hdl.handle.net/123456789/386
Appears in Collections:Journal of the King Saud University - Agricultural Sciences

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