Application of farm by-products and their impact on the chemical properties and productivity of calcareous soil [electronic resource].

Includes references.

A field experiment was conducted at Maryut Experimental Station, of the Desert Research Center, to evaluate the uses of some different organic manures, such as, farmyard manure (F), rabbit manure(R) and turkey manure (T), for improving the chemical properties of the calcareous Soils and their productivity, barley was used as a test crop. The results indicated that the application of any of the three organic manure either individually or in combinations increased soil organic matter content and decreased soil pH and salinity, as well as, increased total nitrogen, exchangeable potassium and available phosphorus in the soil. All treatments increased the availability of Fe, Mn, Zn and Cd but they decreased Pb availability. The data showed that the application of the studied three organic manures increased significantly the dry weight of barley yield either grains or straw as compared to the control tr~"1tment. The increment varied according to the type and the level of manure. The results indicated that both concentration and uptake of N, K, P, Fe, Mn, Zn, Cd and Pb by grains and straw of barley plants increased by the increasing application of the three organic manures either added individually or in combination.

Summary in Arabic.

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