THE BIOLOGICAL AND CHEMICAL VARIATION OF ARMY CANAL WATER AND IT'S SUITABILITY FOR AGRICULTURE PURPOSES

Z.K.Hassan,; Ghydaa.H.AI-Jeboury,; H.M.Shukri,

	THE BIOLOGICAL AND CHEMICAL VARIATION OF ARMY CANAL WATER AND IT'S SUITABILITY FOR AGRICULTURE PURPOSES"
The Iraqi Journal of Agricultural Science
Article 1, Volume 41, Issue 1, 2010, Pages 121-132
Authors
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Abstract
Water samples were collected monthly from four sites on Army Canal in Baghdad, for the period from January 2009 to June 2009. All samples were submitted for chemical and biological tests. Hydrogen activity (pH) range was 7.3-7.4, Electrical Conductivity (Ec) range was 0.94-1.01 ds.m'", with significant difference in relation to sites. Range of calcium ions concentration was 3.1-3.6 mmoll-1, magnesium ions 3.1-3.2 moll-1, sodium ions 2.8-3.3 mmoll-1, potassium ions 0.1 mmoll-1, chloride ions 2.4-3.2 mmoll-1, sulfate ions 3.3-3.8 mmoll'", and carbonate. ions 3.3-3.7 mmoll-1 Total dissolved salts (TDS) ranged from 602-646 mg.l-1. There was asignificant difference in regard to sites only. Sodium adsorption rate (SAR) ranged from 1.55-1.80 along all the canals sites and through the six months of the study. Three classification systems were used to evaluate water suitability for agricultural purposes, United State Department of Agriculture (USDA) Classification System (1954), and the result was class (C3-S1) for all sites and months. FAO Classification System (1985), the result was "water with mild-moderate problems" for salt concentration represented by Ec, But for SAR and effect of Na concentration on soil permeability, the results were "no problem to use water for irrigation". FAO Classiftcation System (1992), its result was "low salt irrigation water", no sample was classified as "danger possibilities" in regard to SAR and its effect on soil permeability. According to an Iraqi Classification System, these samples were classified as "good quality water for agricultural and irrigation purposes". Biological tests revealed aerobic Ecoli, Salmonelta ,Shigilla and Feacal coliform according to WHO Guide for biological water evaluation (1998) .

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THE BIOLOGICAL AND CHEMICAL VARIATION OF ARMY CANAL WATER AND IT'S SUITABILITY FOR AGRICULTURE PURPOSES"