Soltani, R. (2008) Calibration of Empirical Leaching Models of Saline Soils in the Educational Farm of Zabol University. Masters thesis, University of Zabol.
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Abstract
This research was performed in complete randomized blocks design with four leaching treatments water depth; 25, 50, 75, 100 cm and marker (without leaching) in four interactions. Leaching experiments performed to application of total depth of leaching water (100 cm) and 25 cm for each four frequency in sixteen blocks (each block is 1*1 m2). First the initial alternation of leaching water added to all blocks and after that water infiltrate at soil, that gravity water exit from viewpoint depth and reaching soil moisture to field capacity, soil sample had taken from four related block of treatment A, thorough 0-25, 25-50, 50-75 and 75-100 cm depths from soil surface, then this blocks removed in experiment. Then the second alternation of leaching water added to other blocks, after infiltration of second alternation of applied water, soil sample had taken from four related block of treatment B, then these blocks removed of experiment. Thus third alternation of leaching water added to remain blocks and process of addition of water and sampling was continued to infiltrate the last stage of applied water, similar to what said. In this research, we sampled from two points in adjacent experimental plots to viewpoint depth of soil profile. These samples used for notification of soil chemical traits and soil moisture before leaching. This research performed in related to calibration of Reeve (1957), Dieleman (1963) and Pazira & Keshavarz (1998) empirical leaching models - each of them are following from a special mathematical form – to introduce best empirical model that have high correlation coefficient with earned farm experimental data. Results of soil analysis showed that soil classification from S3A2 at before beginning the experiment reduced to S2A1 after applying one meter of leaching water depth. The results of calibration empirical leaching models showed that empirical model of Reeve (1957) was better fitted to soil desalinization data in compare with two else model. Also the desalinization curve was fitted to farm test obtaining results with maximum of correlation coefficient of observant data, followed inverse form of mathematical function.
| Item Type: | Thesis (Masters) |
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| Uncontrolled Keywords: | Calibration, Leaching, Empirical Leaching Models, Saline Soils, Educational Farm of Zabol University |
| Subjects: | S Agriculture > S Agriculture (General) T Technology > TC Hydraulic engineering. Ocean engineering |
| Depositing User: | admin admin1 admin2 |
| Date Deposited: | 20 Apr 2016 06:22 |
| Last Modified: | 20 Apr 2016 06:22 |
| URI: | http://eprints.uoz.ac.ir/id/eprint/421 |
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