Your search found 13 records
1 Moya, T. B.. 1981. Water distribution within the Lower Talavera River Irrigation System tertiaries. Paper prepared for A/D/C Workshop on Investment Decisions to Further Develop and Make Use of Southeast Asia's Irrigation Resources, Bangkok, Thailand, 17-21 August 1981.
Irrigation programs ; Rivers ; Water distribution ; Farms ; Rice ; Agricultural production ; Farmer participation ; Water supply / Philippines / Central Luzon
(Location: IWMI-HQ Call no: P 166 Record No: H01914)
Three turnout areas each located from the upstream, middle and downstream sections of Lateral A of the Lower Talavera River Irrigation System in Central Luzon, Philippines were selected during the 1979 dry season to document the extent of farm water distribution problems. In order of decreasing importance, the following physical parameters were found to influence water distribution on the farms: (a) farm elevation relative to their turnouts, (b) accessibility to the (supply) farm ditches, (c) percentage sand sized particles in the soil and (d) farm ditch density. The paddy overland distance from the turnout becomes a significant problem in water distribution interacting with cases of inadequate hydraulic working head at the turnout. Some of the common farmer's interference behavior, such as checking, breaking embankment, closing and opening of turnout gates at will, and disturbing measuring devices are, in large measure, their rational responses to a physical system that does not fit well to their needs and desires. An improved design method, the "Custom Fit Design Technique" was introduced to account for the topographically high paddies that are frequently included in the service areas of most gravity systems. Hence, resulting in the layouts and design of field distribution network that reflects well the existing topography.
2 Moya, T. B.; Murray-Rust, H. 1985. Another white elephant (?): An understanding of the problems and prospects. Paper presented at the Guimba Cropping Systems Research Workshop, Cabanatuan City, 22-23 May 1985. 19p.
(Location: IWMI-HQ Call no: P 557 Record No: H01978)
3 Moya, T. B.; Early, A. C. 1980. Some findings on water distribution within the tertiaries of a gravity irrigation system. IRRI Saturday seminar, 12 April 1980. v.p.
Water distribution ; Crops ; Gravity flow ; Tertiary level irrigation ; Irrigated farming ; Water requirements ; Rice / Philippines
(Location: IWMI-HQ Call no: P 634 Record No: H02390)
4 Moya, T. B.. 1985. Operational requirements for a rice based deep tubewell irrigation system. IRRI Saturday seminar paper, 12 October 1985. 44p.
Deep tube wells ; Rice ; Irrigation operation ; Irrigation efficiency ; Pumps ; Water use efficiency ; Cropping systems ; Water distribution / Philippines
(Location: IWMI-HQ Call no: P 660 Record No: H03894)
5 Moya, T. B.; Miranda, S. M. 1988. Socio-technical issues for diversification rice-based irrigation systems. Paper presented at the National Workshop on Irrigation Management for Crop Diversification, Ternate, Cavite, Philippines, 5-7 October 1988. 53p.
Irrigated farming ; Rice ; Diversification ; Technology ; Soil-water-plant relationships ; Climate ; Irrigation operation ; Water distribution ; Economic aspects / Philippines
(Location: IWMI-HQ Call no: P 192 Record No: H04588)
6 Moya, T. B.; Walter, M. F. 1988. Irrigation system operations intensity and relative water supply: The Asian case. Ithaca, NY, USA: Cornell University. 90p.
Irrigation systems ; Operations ; Water supply ; Water management ; Water allocation ; Land ; Indicators / Sri Lanka / Philippines / Indonesia / Gal Oya Project
(Location: IWMI-HQ Call no: 631.7.1 G570 MOY Record No: H04967)
7 Moya, T. B.; Cablayan, D. M.; Alagcan, M. M.; Early, A. C. 1983. Irrigation system management research in Central Luzon: A progress report. Paper presented the 33rd Annual convention of the Philippine Society of Agricultural Engineers (PSAE) at VISCA, Baybay, Leyte, 28-29 April 1983. 36p.
(Location: IWMI-HQ Call no: P 897 Record No: H05071)
8 Moya, T. B.; Miranda, S. M. 1989. Socio-technical issues in diversifying rice-based irrigation systems. In Valera, A. (Ed.) Crop diversification in irrigated agriculture in the Philippines: Proceedings of a national workshop, Puerto Azul Beach and Country Club, Ternate Centre, The Philippines, 5-9 October 1989. pp.4-19.
Diversification ; Rice ; Irrigation systems ; Social aspects ; Technology ; Irrigated farming / Asia
(Location: IWMI-HQ Call no: IIMI 631.7.2 G732 VAL Record No: H006094)
(0.28 MB)
Since the early 60s many rice-producing countries in Asia have launched agricultural diversification projects to stimulate farm productivity. However, these projects have succeeded in only a few countries. Perhaps, the pressure to diversify agriculture, especially the irrigated rice systems, were less compelling then than today. At present, the water supply scarcity in rice based irrigation systems and the low price of rice in the world market will constrain irrigation personnel and farmers to veer away from monoculture rice systems. As rice irrigation systems can hardly maintain productivity and equity under limited water supplies, they will diversify into less water-demanding non -rice crops. Similarly, as farmers continue to reel under low profits, sometimes losses, from rice farming they will consider crop diversification. This paper examines the driving and restraining forces in crop diversification, especially in irrigated rice-based systems. Technical, social and institutional issues in crop diversification are being presented to provide insights on (1) how existing rice-based irrigation systems can be operated or rehabilitated to permit cropping systems flexibilities and/or (2) designing and constructing new rice based irrigation schemes for crop diversification.
9 Gines, H. C.; Moya, T. B.; Pandey, R. K.; Carnagal, V. R. 1989. Crop diversification: Problems and prospects in partially irrigated rice based farming systems. In Valera, A. (Ed.) Crop diversification in irrigated agriculture in the Philippines: Proceedings of a national workshop, Puerto Azul Beach and Country Club, Ternate Centre, The Philippines, 5-9 October 1989. pp.147-166.
(Location: IWMI-HQ Call no: IIMI 631.7.2 G732 VAL Record No: H006107)
(0.42 MB)
A multidisciplinary on-farm research project was implemented in the service area of deepwell pump system at Barangay Bantung Guimba, Nueva Ecija in Central Luzon, Philippines. The project aimed to study techniques necessary to grow irrigated upland crops in rotation with wet season rice and to test the viability of these techniques with respect to agronomic, water management and socio-economic constraints. Agroecosystems of the research sites were analyzed for infrastructural, socio economical and technological constraints to crop diversification and intensification. Baseline survey revealed that farmers practice double rice cropping in the lower strata(lungog) and single rice in the upper strata (turod) landforms. The rice-rice patterns leads to undue pressure on water resources during the dry season. With the present water use efficiency (WUE) of 50% the irrigation systems could adequately irrigate only one-third of the programmed area for the dry season (DS) rice. Research results for three consecutive crop years have shown that, if all farmers switch to upland crops such as corn and mungbean during the DS, it would be possible to cultivate 75 and 100% of the service area at 50 and 80% WUE, respectively. Evaluation and integration of component technology for upland crops improved the cropping sequence, i.e. rice-corn mungbean and increased farmers income over existing cropping patterns.
10 Magliano, A. R.; Cablayan, D. M.; Undan, R. C.; Moya, T. B.; Pascual, C. M. 1990. Technical consideration for rice-based farming systems: Main irrigation system management. In Intercountry workshop on irrigation management for rice-based farming systems, Colombo, Sri Lanka, 12-14 November 1990. 15p.
(Location: IWMI-HQ Call no: IIMI 631.7.2 G000 INT Record No: H08066)
11 Moya, T. B.. 1992. Crop diversification and cropping-system flexibility in rice-based irrigation systems. IMCD News (Newsletter of the Research Network for Irrigation Management for Crop Diversification in Rice-Based Systems), 3(1):1-2.
(Location: IWMI HQ Call no: P 2618, IWMI Record No: H011882)
12 Moya, T. B.. 1992. Crop diversification and cropping systems flexibility in two Philippine rice-based irrigation systems. A dissertation presented to the Faculty of the Graduate School of Cornell University in partial fulfillment of the requirements for the Degree of Doctor of Philosophy. xxviii, 343p.
(Location: IWMI-HQ Call no: D 631.7.2 G732 MOY, 631.7.2 G732 MOY Record No: H012111)
Another shorter version published in 1990. 146p.
13 Maglinao, A. R.; Cablayan, D. M.; Undan, R. C.; Moya, T. B.; Pascual, C. M. 1993. Main irrigation system management for rice-based farming systems in the Philippines. In Miranda, S. M.; Maglinao, A. R. (Eds.), Irrigation management for rice-based farming systems in Bangladesh, Indonesia and the Philippines: Proceedings of the Tri-Country Workshop held in Colombo, Sri Lanka, 12-14 November 1990. Colombo, Sri Lanka: IIMI. pp.59-97.
(Location: IWMI-HQ Call no: IIMI 631.7.8 G570 MIR Record No: H013404)
(1.37 MB)
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