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Tiwari, K. N.
- Evapotranspiration and Crop Coefficient of Okra under Subsurface Drip with and without Plastic Mulch
Abstract Views :244 |
PDF Views:72
Authors
Ashish Patil
1,
K. N. Tiwari
1
Affiliations
1 Agricultural and Food Engineering Department, Indian Institute of Technology, Kharagpur 721 302, IN
1 Agricultural and Food Engineering Department, Indian Institute of Technology, Kharagpur 721 302, IN
Source
Current Science, Vol 115, No 12 (2018), Pagination: 2249-2258Abstract
Field experiments using lysimeters were conducted in sub-humid climatic condition to estimate water balance parameters, regional crop coefficient development and to evaluate yield response of okra crop under subsurface drip (SSD) irrigation with and without plastic mulch. In the year 2016, total crop evapotranspiration under SSD with and without plastic mulch was 403 and 512 mm respectively, whereas in 2017 it was 363 and 468 mm respectively. Average crop coefficient of okra was 0.31, 0.42, 0.68, 0.77 and 0.48 measured under SSD with plastic mulch condition, and 0.51, 0.72, 0.92, 0.93 and 0.53 without plastic mulch. High yield of okra with minimum crop evapotranspiration was observed under SSD with plastic mulch treatment due to lower irrigation water requirement, minimum evaporation and less weed transpiration under plastic film compared to nonmulch condition.Keywords
Crop Coefficient, Evaporation, Okra, Plastic Mulch Condition, Subsurface Drip Irrigation.Full Text
References
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- Sink Removal from Digital Elevation Model–A Necessary Evil for Hydrological Analysis
Abstract Views :251 |
PDF Views:70
Authors
Affiliations
1 Civil Engineering Department, BRCM College of Engineering and Technology, Bahal 127 028, IN
2 Agricultural and Food Engineering Department, Indian Institute of Technology Kharagpur, Kharagpur 721 302, IN
1 Civil Engineering Department, BRCM College of Engineering and Technology, Bahal 127 028, IN
2 Agricultural and Food Engineering Department, Indian Institute of Technology Kharagpur, Kharagpur 721 302, IN
Source
Current Science, Vol 117, No 9 (2019), Pagination: 1512-1515Abstract
The present study involves a comparative appraisal of three different sink removal algorithms. The publicly available shuttle radar topographic mission (SRTM) digital elevation model (DEM) version 3.0 of 90 m resolution was used as input DEM. Three sink filling algorithms proposed by Jennson and Domingue (JD), Planchon and Darboux (PD), and impact reduction approach by Lindsay were evaluated for their efficiency in removing the sink from SRTM DEM with minimum alteration of original DEM quality. Various primary and secondary parameters were used for comparative assessment. It was found that all the three algorithms altered the originality of the DEM significantly, but to a different extent. It was found that the PD method of sink removal was better than the other two methods studied here. However, the results also substantiated that the hydrologist must take due care to minimize any uncertainty that might arise due to DEM preprocessing.Keywords
Digital Elevation Model, Hydrological Preprocessing, Sink Filling Algorithms, Terrain Analysis System.Full Text
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