Study the Effect of Some Organic Amendments and Irrigation Levels on the Productivity of the Clay Soil and Some Physical Properties

Riyad Bladia, Riham Fouzi Zahalan


Two field experiments were carried out during the agricultural seasons 2009/2010 and 2010/2011 at Hout research center in Swaida /Syria. The experimental designed as split plot design with two irrigation treatment/ 100%- 70% / of the field capacity and four fertilizer treatments by using three different kinds of organic amendments : compost of town refuse, sewage sludge and municipal manure(sheep) in addition to a mineral fertilizer and the untreated control with three replications for each one. The results showed that sewage sludge was the best to increase the productivity of / wheat –sham3 / crop with a percentage of 29% in compare with the control in the 100% irrigation treatment during the both years of the study, and / 31-33%/ in the 70% treatment in the two years, respectively. Whereas the compost of town refuse was the best in improving the studied physical parameters which increased the soil content of organic matter 90% comparing with the control and had a superiority in improving the soil bulk density with a decrease of 28% and the real density with a percent reached at 26% in addition to the total porosity which reached to 47.93% in the first year of the study and the accumulative infiltration which reached to(3.49 – 4.96) cm/hour in the two years, respectively. The results also showed the ability to have very close results for the total productivity of the crop with an ability to reduce the added amounts of the irrigation water of 30%. That clarifies the positive effect of organic amending process for the soil by using recycled wastes.


wheat, mineral fertilizer, organic amendments, clay soil, physical properties, productivity

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