Determination of macro and micronutrients levels in organic manure soils and irrigation water

Abstract

The organic fertilization is cornerstone to raise production value of agricultural land and reduce environmental pollution resulting from the excessive use of chemical fertilizers. Therefore, recycling is important factor that lead to the provision of large quantities of organic fertilizers that meet the needs of agricultural land, especially sandy soils that are poor in organic matter. The study includes estimating the concentration of selected chemical elements and heavy metals in agricultural soils fertilized with organic matter and recycled irrigation water in some areas of the Wadi-Al shati including (Ashkeda , Qyra, Dabdab, Qaqum , Tamazawa , Aqar , and Mahruqa ), where the soil physical and chemical properties are analyzed here.

The results showed that the studied soils consistency range from sandy to loamy sand, which has an important role in determining the ability of the soil to retain nutrients. Organic matter played a role in increasing the productivity of sandy soils by 0.63% and improved the cation exchange capacity to reach 39.36 million equivalent / 100 g soil in sandy soils textures. Also, the study showed that the clay minerals and organic matter and pH are the most important factors that influence the content of the soil of heavy elements in addition to the clay minerals which originated the soil.

The results showed that irrigation water has direct effect on the properties of physico-chemical properties of soil where accumulation of salts like sulfates of calcium,  magnesium and sodium chloride , calcium, Bicarbonate calcium in the soil. Results showed that the concentration of the elements manganese, chromium, and cadmium in irrigation water was higher than the maximum limits by the FAO standard. Also, the results show that levels of zinc, nickel and iron were within the allowable limit, and the elemental lead and copper are below detection limits.

Keywords: Fertilization, Environmental pollution, Recycling, Nutrients, Production value, Physico-chemical properties.