Mustafa, M.A. and Abdel-Magid, E.A. (1981) The effects of irrigation interval, urea-n, and gypsum on salt redistribution in a highly saline-sodic montmorillonitic clay soil under forage sorghum. Soil Science, 132 (4). pp. 308-315.
![[img]](http://eprints.icrisat.ac.in/style/images/fileicons/application_pdf.png) |
PDF
Restricted to ICRISAT researchers only |
Abstract
We conducted two split-split plot field experiments during June to December 1978 and April to October 1979, in two neighboring sites of a highly saline-sodic montmorillonitic clay soil cropped with forage sorghum, to study the effects of irrigation interval-7, 10, and 15 days; 0 N, 1 N, 2 N, and 3 N (1 N = 43.8 kg N/ha) applied as urea; and 0 or 11.9 tons/hectare gypsum on salt redistribution. In each season two cuttings of the fodder were harvested in about 6 months. Similar seasonal quantities of water, amounting to 2710 millimeters in 1978 and 3071 millimeters in 1979, were applied in 26, 20, or 14 intermittent irrigations (furrow) to all treatments. The water used, relative to U.S. class A pan evaporation, was 1.03 for the first cuttings of the two seasons and 1.13 and 1.06 for the second cuttings of the 1978 and 1979 seasons, respectively. Soil samples were collected, in 20-centimeter increments, down to 1 meter by the end of the second cutting of each season, and ECe and ESP were determined. Comparison among treatments showed that ECe of the 0- to 40-cm zone and ESP of the 0- to 60-cm zone decreased with decrease in irrigation interval and nitrogen fertilization. Gypsum application increased ECe, but reduced ESP in the two zones, respectively. The reverse treatment effects were obtained below these zones. Irrigation, irrespective of treatments, reduced ECe and ESP in the top zones and increased it below. Peaks of salt concentration (ECe) and ESP were located at 40 to 60 and 60 to 80 cm, respectively. These peaks were evidenced irrespective of treatments. The effect of irrigation interval on salt redistribution was more pronounced than the effect of other treatments
| Item Type: | Article |
|---|---|
| Author Affiliation: | Department of Biochemistry and Soil Science, Faculty of Agriculture, University of Khartoum, Shambat, Sudan Sudan |
| Subjects: | Soil Science and Microbiology > Soil Sciences |
| Divisions: | Sorghum |
| Depositing User: | Ms K Syamalamba |
| Date Deposited: | 04 Mar 2013 05:33 |
| Last Modified: | 04 Mar 2013 05:33 |
| Official URL: | http://journals.lww.com/soilsci/toc/1981/10000 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/9764 |
Actions (login required)
 |
View Item |
