TY - JOUR ID - 69678 TI - The Effects of Organic Matter, Gypsum and Leaching on Physico-chemical Properties of a Sodic Soil JO - Iranian Journal of Soil and Water Research JA - IJSWR LA - en SN - 2008-479X AU - vafaee, mosayeb AU - Golchin, Ahmad AU - Sadeghbeigi, Akram AU - mansouri, tahereh AD - Former M.Sc. Student, Department of Soil Science, College of Agriculture, Zanjan University, Zanjan, Iran AD - Professor, Department of Soil Science, College of Agriculture, Zanjan University, Zanjan, Iran AD - Ph.D. Student, Department of Soil Science, College of Agriculture, Zanjan University, Zanjan, Iran Y1 - 2019 PY - 2019 VL - 49 IS - 6 SP - 1201 EP - 1214 KW - Dispersible clay KW - Exchangeable sodium percentage KW - Leaching KW - Organic waste KW - Sodic soil DO - 10.22059/ijswr.2018.235269.667698 N2 - In order to investigate the effects of different levels of gypsum (0, 50 and 100% gypsum requirement), organic matter (1.5 and 3% w/w organic carbon) from different sources (alfalfa residue, corn residue, date waste and saw dust) and leaching on the physico-chemical properties of a sodic soil, a factorial experiment was conducted in a greenhouse using a completely randomized design with three replicates. The results showed that the application of gypsum improved the sodic soil properties, before and after the leaching. However, the application of organic matter slightly increased sodium adsorption ratio, exchangeable sodium percentage and the percentage of dispersible clay measured before leaching. But after leaching, these characteristics were decreased significantly as compared to the control. The application of organic matter together with gypsum, especially the application of 3% date waste with gypsum, improved the properties of the sodic soil after the leaching more effectively than the application of gypsum and organic matter separately. UR - https://ijswr.ut.ac.ir/article_69678.html L1 - https://ijswr.ut.ac.ir/article_69678_7cc4d0f48f7acddc52c896a4ce787a4b.pdf ER -