REVISING WETTED SOIL VOLUME UNDER TRICKLE SOURCE FOR IRRIGATION SCHEDULING | ||
| Misr Journal of Agricultural Engineering | ||
| Article 11, Volume 27, Issue 4, October 2010, Pages 1162-1183 PDF (868.1 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/mjae.2010.104809 | ||
| Authors | ||
| Kamal H. Amer1; Amal Elsharkawi2; Ahmed S. Hassan2 | ||
| 1Dep. of Agr. Eng., Menofia University, Shibin El-Kom, Egypt. | ||
| 2Research Institute of Agr. Eng., Agriculture Ministry, Geza, Egypt. | ||
| Abstract | ||
| Wetted soil shape under trickle irrigation is an important parameter in irrigation scheduling and design in agricultural farms. Irrigation water should not be beyond crop root zone to avoid deep percolation. Moreover, irrigation water applied should adequate crop water use in irrigation interval. The purpose of this work is to figure out the suitable shape of wetted soil based on soil type, flow rate, and crop water use. A field experiment was conducted in sand, silt and clay soils under trickle source with varying flow rates as 2, 4, 8, 16, and 24 liter/h. Squash, corn, and grape crops were selected to represent different root zones for irrigation scheduling. Field results showed that horizontal and vertical water movements were related to both emitter flow rate and soil intake rates. Suitable flow rate and irrigation interval were found for selected soil and crop types. Soil moisture content was contoured directly after irrigation and soil-water redistribution. Optimal flow rates were 2 and 4 liter/h in clay soil, 8 and 16 liter/h in loam, 16 and 24 liter/h in sand. Adjusted method was recommended to calculate irrigation interval by revising wetted root zone volume, taking into account different soil, crops, crop stages, and seasons. | ||
| Keywords | ||
| Wetted soil volume; Trickle irrigation; Irrigation scheduling | ||
| References | ||
|
Amer, K.H., S.A. Medan, and J.L. Hatfield (2009). Effect of deficit irrigation and fertilization on cucunber. Agron. J. 101(6): 1556-1564.
Amer, K.H. (2010). Corn crop response under managing different irrigation and salinity levels. Agr. Water Manage., (97): 1553-1663.
Amir, I. and J. Dag (1993). Lateral and longitudinal wetting patterns of very low energy moving emitters. Irrig. Sci. 13: 183-187.
Ben-Asher, J., D.O. Lomen, and A.W. Warrick (1978). Linear and nonlinear models of infiltration from a point source. Soil Sci. Soc. Am. J. 42, 3–6.
Ben-Asher, J. and C.J. Phene (1993). Analysis of surface and subsurface drip irrigation using a numerical model. In: Subsurface Drip Irrigation—Theory, Practices and Application, California State University, Fresno, CA, pp. 185–202. CATI Pub. No. 92 1001.
Bjerkholt, J.T., and E. Myhr (1996). Potential evapotranspiration from some agriculture crops. Proceedings of ASAE Conf. Nov. 3-6 in San Antonio, Texas: 317-322.
Brandt, A., E. Bresler, N. Diner, J. Ben-Asher, J. Heller, and D. Goldberg (1971). Infiltration from a trickle source. 1. Mathematical models. Soil Sci. Soc. Am. Proc. 35 (5), 675–682.
Bresler, E. (1978). Analsis of trckle irrigation wih application desin problems. Irri. Sci. 1: 3–13.
Elmaloglou, S. and N. Malamos (2006). A methodology for determining the surface and vertical components of the wetting front under a surface point source, with root water-uptake and evaporation. J. Irrig. Drain. 55 (1), 99–111.
Elmaloglou, S. and E. Diamantopoulos (2007). Wetting front advance patterns and water losses by deep percolation under the root zone as influenced by pulsed drip irrigation. Agric. water manage. 90, 160-163.
Fernandez-Galvez, J. and L.P. Simmonds (2006). Monitoring and modelling the three-dimensional flow of water under drip irrigation. Agric. water manage. 83: 197–208.
Howell, T.A., A.D. Schneider, and S.R. Evett (1997). Subsurface and surface microirrigation of corn -Southern High Plains. Trans. of the ASAE, Vol. 4(3): 635-641.
Keller, J. and R.D. Bliesner (1990). Sprinkler and trickle irrigation. Avi. Book, New York.
Schwartzman, M., and B. Zur (1986) Emitter spacing and geometry of wetted soil volume. J Irrig Drainage Engr ASCE 112:242–253.
Singh, D.K., T.B.S. Rajput, D.K. Singh, H.S. Sikarwar, R.N. Sahoo, and T. Ahmad (2006). Simulation of soil wetting pattern with subsurface drip irrigation from line source. (8 3): 1 30 – 1 34.
Wu, J., R.Zhanh, and S. Gui (1999). Modeling soil water movement with water uptake by roots. Plant Soil 215, 7–17.
Zur, B. (1996). Wetted soil volume as a design objective in trickle irrigation. Irri. Sci. 16: 101-15. | ||
|
Statistics Article View: 250 PDF Download: 320 |
||
