Liming and leaching of acid sulphate soil | |
| Author | Luthra, Vijay Kumar |
| Call Number | AIT Thesis no.AE-78-08 |
| Subject(s) | Soils--Thailand--Rangsit--Leaching Liming of soils--Thailand--Rangsit |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | A laboratory experiment was conducted with acid sulphate soil (Rangsit Series) of Bangkok plain in the months of May-June in order to investigate the possibility of improving the chemical properties of soils along Rangsit canal by combination of liming and leaching. A bulk of soil samples of 0-30 and 30-60 cm soil layer were digged out in April 1978. The Rangsit canal water was also collected at same time from 3 locations. Air dried soil was compacted up to 60 cm manually in 13 cm diameter and 72 cm long PVC tubes and top 15 cm of soil was mixed with commercial slake lime at the rate of 3, 6 and gms/soil column in 3 replications. Daily pan evaporation was recorded and soil was leached for 7 weeks at 4days interval. Leachate was collected at the end of each leaching. Soil samples were also collected at the end of experiment. The samples were analysed for their chemical properties. It was observed that the soil condition was improved by liming and leaching. Thus, pH of the 0-30 cm soil layer increased significantly (3.9 to 7.5) with increasing lime and leaching whereas in 30- 50 cm soil layer only the effect of leaching was significant on the increase of pH of the soil (3.9-5.5). The concentration of Na+, K+, Al+++ and Fe++ decreased with increasing liming and leaching whereas EC, ca++ and Mg++ decreased with increasing leaching and increased with increasing liming in saturation extract of soil. The effect of liming and leaching was significant in the case of EC, K+, Na+, ca++ and Fe++ whereas only liming in case of Mg++ and leaching effect, on concentration of Al+++ was significant in saturation extract of soil. Except in the case of Ca++ concentration in saturation extract of soil, the liming and leaching interaction was not significant. |
| Year | 1978 |
| Type | Thesis |
| School | School of Environment, Resources, and Development |
| Department | Department of Food, Agriculture and Natural Resources (Former title: Department of Food Agriculture, and BioResources (DFAB)) |
| Academic Program/FoS | Agricultural and Food Engineering (AE) |
| Chairperson(s) | Apichart Anukularmphai ; Nielsen, Jens Moller |
| Examination Committee(s) | Singh, Gajendra ; Paiboon Prabuddham |
| Scholarship Donor(s) | The Government of United Kingdom |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1978 |