Qasim Al-Faraj^(1)*

• Department of Soil and Land Reclamation, Faculty of Agriculture, Al Furat University, Deir al- Ezzor,Syria .

(*Corresponding author: Dr. Qasim al-faraj E-Mail: d.kahsmfaraj@gmail.com).

Received: 28/04/2020                                Accepted: 8/07/2020

Abstract

A pots experiment, carried out in (summer 2019) at the Faculty of Agriculture at the University of Euphrates to study the effect of limestone soil on the decomposition of sulfur and its availability in relation to various additives of agricultural sulfur 100 mg / kg soil 300 mg / kg soil – 400 mg / kg of soil and add organic matter Calculated based on (1.5% of organic carbon), the experiment was performed as universal within a completely randomized design, with three replicates, for a duration of / 30 days. The amount of carbon dioxide released was measured over 30 days, and over three periods. The study showed the negative effect of calcium carbonate on the emission of carbon dioxide in the soil that contains a high percentage of calcium carbonate (23.2%) and reached (258.5 mg CO2 100 / g of soil / day). It was also found that sulfur did not show a positive effect on the decomposition of the organic matter in the soil of the experiment, but it was the largest role in the production of carbon dioxide for the organic matter. There were no statistically significant differences between carbon additives in their effect on the decomposition of organic matter. Instead, the effect of sulfur was reflected on some chemical properties, such as the pH of the soil reaction, as there was a significant effect of agricultural sulfur levels with organic matter on reducing the pH by 10.9%, as well as on the degree of electrical conductivity in addition to increasing the sulfur concentration (available) In the soil

Key words: Calcareous soil – Organic matter – Agricultural sulfur – Available sulfur

Full paper in Arabic: PDF