efciency in agriculture. Shell splitting (endocarp dehiscence) at harvest (a positive impact) was significantly higher (10.4% relative to the Control) but this was offset by a nut weight reduced by 9.4%. Sci. 25:209-231. ), (2009): Manejo Sostenible del Agua para Riego en Sudamérica. Farmers — major agents of agricultural land use change — were interviewed to obtain their LUCC intentions according to the scenarios studied. At last the daily precise man- agement of systems, following soil water potential, considering the effective rain storage at root depth of the crop and the evolution of daily evapotranspiration, preserving natural resources, are relevant to achieve low values of water footprint of this crop. Thus, RDI treatments during July and August allowed water savings between 6 to 22% without affecting yield or its components, nor fruit quality, providing that a threshold value of Ψa -1.2 MPa was not surpassed. Descriptive and inferential statistical analysis of the data was accomplished using SPSSV19 and SmartPLSV3 software. Study results indicate that increasing the length of the furrow reduces RE, RDE, and TDE values. Previous experimental studies carried out under certain climatic and soil conditions showed that risk of ground water pollution could be reduced by 20-30% if water and fertilizer are applied separately (by Alternative Furrow Irrigation-AFI). To verify if the fitting simulations performed well, techniques to measure agreement and quantity-allocation disagreements were applied.These outcomes could provide decision-makers with the capacity to observe different possible futures in ‘what if’ scenarios, allowing them to anticipate future uncertainties, and consequently allowing them the possibility to choose the more desirable future. La agricultura está concentrada entre las regiones de Coquimbo y Los Lagos, cubriendo la mayor parte del territorio nacional, con 270.000 agricultores que trabajan 30.45 millones de hectáreas, el 40% de la superficie continental. La disponibilidad de agua es uno de los mayores problemas que limita el desarrollo económico de Chile. To increase willingness to accept technology among Roudbar County olive farmers, it is suggested to hold extension and education courses by organizations for raising knowledge and awareness of pressurized irrigation technology. The Total Distribution Efficiency (EDT) was 95.13% when measurements finished while the irrigation systems is of. Design of Drip Irrigation Lines I-PAI WU and H. M. GITLIN INTRODUCTION A drip irrigation system consists of a main line, subma ins, laterals, and emitters. Leaf water potential decreased during deficit irrigation periods in T-1 and T-2 treatments. A water saving of 30 and 20% was achieved in the T-1 and T-2 treatments, respectively. We refer to this model, implemented in NetLogo, as the stakeholder-LUCC model. Productive and vegetative tree responses were analyzed during 3 consecutive years in peach [Prunus persica (L.) Batsch cv. The objective of this paper is to optimize the modeling approach in order to simulate acceptably precisely water and nitrogen transfer under different water/fertilization practices. The focus of this work was to assess the impact of deficit irrigation during various parts of the season with the goal of determining which period was most stress tolerant in terms of nut production. m) and Alliumcepa (32375cu. Tree growth under SDI, as measured by trunk size, was comparable to surface drip irrigation but slightly smaller than micro-jet irrigated trees when equal amounts of irrigation water were applied. Pistachio nuts have a unique fruit growth pattern in which rapid kernel growth does not begin until about six weeks after full shell size has been attained. Postharvest water deprivation (5.0% less applied water than the Control) had no significant negative effects on yield components. D.A.Webb.). The control treatment, like RDI-P and RDI-SII-P when not receiving RDI, was irrigated at 100% of a water budget irrigation scheduling in 1994 and 1996, full crop years, and 80 % of the budget in 1995, an off year with a very small crop. La misión del Centro es ser un referente para el manejo del agua en la industria. diseño, manejo, y operación de los sistemas de riego, los principales criterios y procesos para mejorar el diseño. To increase willingness to accept the technology among Rudbar township olive farmers, it is suggested to hold extension and education classes by organizations for raising knowledge and awareness of pressurized irrigation technology. The aim of this paper is to, This study analyzes the relationship between the variables of furrow irrigation and the irrigation performance parameters, crop yield, and deep percolation as a basis for furrow irrigation design and management. Our research aimed to simulate the water-use efficiency (WUE) of crops considering different irrigation strategies in the Central Valley of Chile. We believe RDI during Stage 2 and postharvest is a viable irrigation strategy to save water while maintaining top yields of high quality pistachio nuts. Minimum ψx in the rain fed treatment reached -8 MPa. The results presented in this paper model where, when, why, and what conversions may occur in the future in regard to stakeholders' points of view. The main purpose of this study was to investigate factors affecting the adoption of pressurized irrigation technology among Rudbar township olive farmers by path-structural modeling and Unified Theory of Acceptance and Use of Technology (UTAUT). Drip Irrigation Design . The season was divided into three preharvest periods: leafout to full shell expansion (Stage 1), full shell expansion to the onset of rapid kernel growth (Stage 2), and rapid kernel growth to harvest (Stage 3). Irrigation uses around 70% of total available fresh water, while irrigation water application efficiency is around 40%. Eng. : irrigation, design, water management, operation systems. An experiment on Regulated Deficit Irrigation (RDI) was performed during 1997 and 1998 in a drip-irrigated Clementina de Nules/Carrizo Citrange orchard planted in 1985 in Moncada (Valencia, Spain). fil.) To test validity of questionnaire; content, face, convergent and discriminant validity were used.