Document Type : Research Paper
Authors
Abstract
This paper investigates the effects of plant growth on soil quality in Sagzi plain of Isfahan in order to evaluate the effects of agriculture on desertification processes in dry lands. Inappropriate crop management is the most effective factor which is related to soil and water salinization and this is one of the important processes of desertification. Is agriculture a positive or negative factor for reclamation of saline soils? To find an answer for this question, some improved and degraded factors of desertification in Sagzi plain of Isfahan were considered. Among those common agricultural products, which of them is more effective and which of them is less effective in soil reclamation? Treatments of Medicago, Wheat and Barley were selected and compared with derelict land that was independent variable in this experiment. In order to investigate the effects of those products, soils were considered that were allocated to cultivation of these products successively at least for 5 years. Then sampling was selected in every treatment with 5 reduplication, from the depth of 0-3, 30-60, 60-90, 90-120, 120-150 centimeter. The saline features and CaCo3, EC, OM,K+, Mg2+,Ca2+, Na+, Caso4, Cl-, SAR, HCo3-, So42- investigated in every treatments. Dunkan test was applied for comparison of soil features. The results of variance analysis showed that there is significant different between treatments in different depths. Dunkan is test showed that according to the overall scores for each factor, derelict lands are least decent treatment while Weat annual agro technical lands are the most suitable one. Then this is better that agricultural products that are appropriated with condition is cultivated.
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