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• 31. [Article] Efficient lawn irrigation in the Intermountain West

  Published October 2010. Reviewed November 2014. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog

  Citation × Citation Citation Abstract Copy Title: Efficient lawn irrigation in the Intermountain West Author: Charlton, Brian A., Cook, Thomas W., Golembiewski, Robert Craig, 1969-, Oregon State University. Extension Service Published October 2010. Reviewed November 2014. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog Title: Efficient lawn irrigation in the Intermountain West Author: Charlton, Brian A., Cook, Thomas W., Golembiewski, Robert Craig, 1969-, Oregon State University. Extension Service Published October 2010. Reviewed November 2014. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog Close

• 32. [Article] Successful potato irrigation scheduling

  Published October 2006. Revised January 2013. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog

  Citation × Citation Citation Abstract Copy Title: Successful potato irrigation scheduling Author: Pereira, Andre, Wang, Feng-Xin, Eldredge, Eric P., Flock, Rebecca, Oregon State University. Extension Service, Shock, C. C. (Clinton C.) Published October 2006. Revised January 2013. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog Title: Successful potato irrigation scheduling Author: Pereira, Andre, Wang, Feng-Xin, Eldredge, Eric P., Flock, Rebecca, Oregon State University. Extension Service, Shock, C. C. (Clinton C.) Published October 2006. Revised January 2013. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog Close

• 33. [Image] TULELAKE IRRIGATION DISTRICT - J-1 Lateral about Sta. 150

  	KP-2478-R2 Klamath Project - TULELAKE IRRIGATION DISTRICT. View of turnout showing Armco corrugated metal headwall and Armco gate. Installation by Tulelake Irrigation District; October 21, 1958; Photo ...
  	Citation × Citation Citation Abstract Copy Title: TULELAKE IRRIGATION DISTRICT - J-1 Lateral about Sta. 150 Author: United States. Bureau of Reclamation, Greene, K.J. Year: 1958, 2008, 2006 KP-2478-R2 Klamath Project - TULELAKE IRRIGATION DISTRICT. View of turnout showing Armco corrugated metal headwall and Armco gate. Installation by Tulelake Irrigation District; October 21, 1958; Photo by K. J. Greene Title: TULELAKE IRRIGATION DISTRICT - J-1 Lateral about Sta. 150 Author: United States. Bureau of Reclamation, Greene, K.J. Year: 1958, 2008, 2006 KP-2478-R2 Klamath Project - TULELAKE IRRIGATION DISTRICT. View of turnout showing Armco corrugated metal headwall and Armco gate. Installation by Tulelake Irrigation District; October 21, 1958; Photo by K. J. Greene Close

• 34. [Article] Opportunity costs : irrigation vs. hydropower

  In recent years we have seen increasing debate over the allocation of PNW water resources. In particular there are conflicts over using the river system for irrigation vs. electricity production. Denying ...

  Citation × Citation Citation Abstract Copy Title: Opportunity costs : irrigation vs. hydropower Author: Ross, Mark In recent years we have seen increasing debate over the allocation of PNW water resources. In particular there are conflicts over using the river system for irrigation vs. electricity production. Denying the hydroelectric system water implies higher costs to electricity consumers as producers substitute more expensive nonhydro resources. This research looked at the impact of new irrigation on PNW electricity consumers. This was done under varying assumptions of demand response and farmer payments for pumping of irrigation water. The study also examined the difference between the current policy of allowing farmers to take all the water they need, and a policy in which withdrawals are limited in periods of low streamflow. Simulations were run to determine the amount of electricity production lost because of withdrawals. These results were then used in a series of simulations to estimate the economic impacts under the various assumptions and policies. It was found that irrigation caused losses to electricity consumers. In some cases this loss was on the order of $200/acre of irrigated land. The loss was significantly mitigated under the interruptible policy. Farmer payments for irrigation energy also reduced the loss to consumers. Title: Opportunity costs : irrigation vs. hydropower Author: Ross, Mark In recent years we have seen increasing debate over the allocation of PNW water resources. In particular there are conflicts over using the river system for irrigation vs. electricity production. Denying the hydroelectric system water implies higher costs to electricity consumers as producers substitute more expensive nonhydro resources. This research looked at the impact of new irrigation on PNW electricity consumers. This was done under varying assumptions of demand response and farmer payments for pumping of irrigation water. The study also examined the difference between the current policy of allowing farmers to take all the water they need, and a policy in which withdrawals are limited in periods of low streamflow. Simulations were run to determine the amount of electricity production lost because of withdrawals. These results were then used in a series of simulations to estimate the economic impacts under the various assumptions and policies. It was found that irrigation caused losses to electricity consumers. In some cases this loss was on the order of $200/acre of irrigated land. The loss was significantly mitigated under the interruptible policy. Farmer payments for irrigation energy also reduced the loss to consumers. Close

• 35. [Article] Hedonic price analysis to reveal value of water in irrigation : an application to northern Malheur County, Oregon

  Increasing water demand for growing municipalities, for water-based recreation and for fishery and wildlife habitat has intensified pressure on the existing resource. Reallocation of water from existing ...

  Citation × Citation Citation Abstract Copy Title: Hedonic price analysis to reveal value of water in irrigation : an application to northern Malheur County, Oregon Author: Faux, John Increasing water demand for growing municipalities, for water-based recreation and for fishery and wildlife habitat has intensified pressure on the existing resource. Reallocation of water from existing uses to other, higher-valued uses is receiving greater attention due to constraints on development of new water supplies. A key to reallocation is identification of the economic value associated with existing and alternative water uses. A hedonic price analysis of farm sales in eastern Oregon is performed to reveal the value of water used in irrigation. Estimation includes a joint test of heteroskedasticity and functional form. The value of water is shown to be strongly influenced by the crop-growing-capability of the soil on which it is applied. The value of an irrigated acre is not significantly influenced by the source of irrigation supply. The implicit market price of irrigation water in this area ranges from $44 per acre-foot (one-time delivery) on the best soils to $9 per acre-foot on the poorest soils irrigated. Title: Hedonic price analysis to reveal value of water in irrigation : an application to northern Malheur County, Oregon Author: Faux, John Increasing water demand for growing municipalities, for water-based recreation and for fishery and wildlife habitat has intensified pressure on the existing resource. Reallocation of water from existing uses to other, higher-valued uses is receiving greater attention due to constraints on development of new water supplies. A key to reallocation is identification of the economic value associated with existing and alternative water uses. A hedonic price analysis of farm sales in eastern Oregon is performed to reveal the value of water used in irrigation. Estimation includes a joint test of heteroskedasticity and functional form. The value of water is shown to be strongly influenced by the crop-growing-capability of the soil on which it is applied. The value of an irrigated acre is not significantly influenced by the source of irrigation supply. The implicit market price of irrigation water in this area ranges from $44 per acre-foot (one-time delivery) on the best soils to $9 per acre-foot on the poorest soils irrigated. Close

• 36. [Article] Linking GIS and a surface irrigation model to evaluate regional effects of furrow irrigation strategies

  The shallow aquifer in Northeast Malheur County, Oregon is polluted with Nitrates at concentrations exceeding federal drinking water standards. Efforts to solve the groundwater problems in this area have ...

  Citation × Citation Citation Abstract Copy Title: Linking GIS and a surface irrigation model to evaluate regional effects of furrow irrigation strategies Author: Faux, Russell N. The shallow aquifer in Northeast Malheur County, Oregon is polluted with Nitrates at concentrations exceeding federal drinking water standards. Efforts to solve the groundwater problems in this area have focused on developing farm management practices that will increase groundwater quality while maintaining agricultural production. Furrow irrigation is the dominant practice for irrigating row crops in this region. One potential way to improve water quality is to increase furrow irrigation performance on a regional scale. In this study a surface irrigation model, SRFR, was linked to a geographic information system (GIS) for the purpose of evaluating alternate furrow irrigation strategies in Malheur County, Oregon. SRFR is a physically based model that simulates water flow and distribution in irrigated furrows. The model accepts the management parameters that influence the outcome of an irrigation and in return provides measures of water application efficiency, amount of deep percolation, amount of surface run-off, and other performance indicators. The GIS, constructed using ARC/INFO software, contains the spatial data required to run SRFR on individual fields in the region. The data for the GIS were acquired using many different sources and techniques in order to meet the input resolution required by the irrigation model. The primary goal of this research was to develop a tool for evaluating irrigation practices on a regional scale, accounting for the diversity of physical circumstances and management practices that occur within a complex of several hundred farms. The particular application of this tool was for control of nitrate pollution of groundwater in the vicinity of Ontario, Oregon. The integrated system was used to estimate a base condition irrigation that is representative of current irrigation practices. The system was then used to assess irrigation performance using three alternative practices: 1) separate management of wheel and nonwheel compacted furrows; 2) use of an automated control system to vary application set times; and 3) cutback irrigation. Although this represents only a limited assessment of the alternatives that might be considered for the study area, preliminary results suggest that under certain field conditions irrigation efficiency can potentially improve more then 20% over the base condition using alternate strategies. The system demonstrated tremendous potential for identifying trends and variability in system performance in the region. Title: Linking GIS and a surface irrigation model to evaluate regional effects of furrow irrigation strategies Author: Faux, Russell N. The shallow aquifer in Northeast Malheur County, Oregon is polluted with Nitrates at concentrations exceeding federal drinking water standards. Efforts to solve the groundwater problems in this area have focused on developing farm management practices that will increase groundwater quality while maintaining agricultural production. Furrow irrigation is the dominant practice for irrigating row crops in this region. One potential way to improve water quality is to increase furrow irrigation performance on a regional scale. In this study a surface irrigation model, SRFR, was linked to a geographic information system (GIS) for the purpose of evaluating alternate furrow irrigation strategies in Malheur County, Oregon. SRFR is a physically based model that simulates water flow and distribution in irrigated furrows. The model accepts the management parameters that influence the outcome of an irrigation and in return provides measures of water application efficiency, amount of deep percolation, amount of surface run-off, and other performance indicators. The GIS, constructed using ARC/INFO software, contains the spatial data required to run SRFR on individual fields in the region. The data for the GIS were acquired using many different sources and techniques in order to meet the input resolution required by the irrigation model. The primary goal of this research was to develop a tool for evaluating irrigation practices on a regional scale, accounting for the diversity of physical circumstances and management practices that occur within a complex of several hundred farms. The particular application of this tool was for control of nitrate pollution of groundwater in the vicinity of Ontario, Oregon. The integrated system was used to estimate a base condition irrigation that is representative of current irrigation practices. The system was then used to assess irrigation performance using three alternative practices: 1) separate management of wheel and nonwheel compacted furrows; 2) use of an automated control system to vary application set times; and 3) cutback irrigation. Although this represents only a limited assessment of the alternatives that might be considered for the study area, preliminary results suggest that under certain field conditions irrigation efficiency can potentially improve more then 20% over the base condition using alternate strategies. The system demonstrated tremendous potential for identifying trends and variability in system performance in the region. Close

• 37. [Article] Successful onion irrigation scheduling

  Published September 2010. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/cat...

  Citation × Citation Citation Abstract Copy Title: Successful onion irrigation scheduling Author: Klauzer, Jim, Feibert, Erik Bruno Goncalves, Oregon State University. Extension Service, Shock, C. C. (Clinton C.), Jensen, Lynn Published September 2010. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog Title: Successful onion irrigation scheduling Author: Klauzer, Jim, Feibert, Erik Bruno Goncalves, Oregon State University. Extension Service, Shock, C. C. (Clinton C.), Jensen, Lynn Published September 2010. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog Close

• 38. [Article] Relationships between degree of ponding and uniformity of soil moisture distribution under irrigation sprinklers

  Often low intake rate soils need special consideration when applying water during an irrigation. Surface flooding for extended periods may cause adverse crop growth conditions. Properly designed sprinkler ...

  Citation × Citation Citation Abstract Copy Title: Relationships between degree of ponding and uniformity of soil moisture distribution under irrigation sprinklers Author: Dehlinger, Charles Robert Often low intake rate soils need special consideration when applying water during an irrigation. Surface flooding for extended periods may cause adverse crop growth conditions. Properly designed sprinkler systems often eliminate irrigation problems, because the application rate and quantity of water applied can be readily controlled. Research workers who have studied sprinkler irrigation disagree on many things. Differences are found in the literature concerning the procedures used to determine sprinkler distribution uniformity and the optimum rate of application of water to the soil. Several authors suggest that moisture movement within the soil occurs after an irrigation. If trans location of moisture occurs, it may be possible to use sprinkler system design specifications that are less critical than those now in use. In order to determine the effect of sprinkler application rate on the resulting soil moisture distribution it is necessary to have criteria relating degree of ponding, crop cover, and slope of the land to the uniformity of soil moisture. Experimental plots were designed and prepared to study and relate these factors to each other. Sprinkler distribution measurements were made to be used in computing sprinkler uniformity. Using neutron equipment, soil moisture determinations were made before the irrigation, one day after irrigation, and three days after irrigation to determine the effect of the irrigation. Final analysis of the data from the experiment indicated that there was not an optimum degree of ponding. In fact, ponding, application rate, grade of plots, and crop cover did not appear to appreciably affect the distribution of soil moisture after an irrigation. Title: Relationships between degree of ponding and uniformity of soil moisture distribution under irrigation sprinklers Author: Dehlinger, Charles Robert Often low intake rate soils need special consideration when applying water during an irrigation. Surface flooding for extended periods may cause adverse crop growth conditions. Properly designed sprinkler systems often eliminate irrigation problems, because the application rate and quantity of water applied can be readily controlled. Research workers who have studied sprinkler irrigation disagree on many things. Differences are found in the literature concerning the procedures used to determine sprinkler distribution uniformity and the optimum rate of application of water to the soil. Several authors suggest that moisture movement within the soil occurs after an irrigation. If trans location of moisture occurs, it may be possible to use sprinkler system design specifications that are less critical than those now in use. In order to determine the effect of sprinkler application rate on the resulting soil moisture distribution it is necessary to have criteria relating degree of ponding, crop cover, and slope of the land to the uniformity of soil moisture. Experimental plots were designed and prepared to study and relate these factors to each other. Sprinkler distribution measurements were made to be used in computing sprinkler uniformity. Using neutron equipment, soil moisture determinations were made before the irrigation, one day after irrigation, and three days after irrigation to determine the effect of the irrigation. Final analysis of the data from the experiment indicated that there was not an optimum degree of ponding. In fact, ponding, application rate, grade of plots, and crop cover did not appear to appreciably affect the distribution of soil moisture after an irrigation. Close

• 39. [Article] Transitional Effects of Double-lateral Drip Irrigation and Straw Mulch on Irrigation Water Consumption, Mineral Nutrition, Yield, and Storability of Sweet Cherry

  This is a scanned version of a published article. The original can be found at: http://horttech.ashspublications.org/. To the best of our knowledge, one or more authors of this paper were federal employees ...

  Citation × Citation Citation Abstract Copy Title: Transitional Effects of Double-lateral Drip Irrigation and Straw Mulch on Irrigation Water Consumption, Mineral Nutrition, Yield, and Storability of Sweet Cherry Author: le Roux, Jac, Bai, Jinhe, Yin, Xinhua, Huang, Xiao-Lan, Long, Lynn E., Seavert, Clark F., Jaja, Ngowari This is a scanned version of a published article. The original can be found at: http://horttech.ashspublications.org/. To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work. Title: Transitional Effects of Double-lateral Drip Irrigation and Straw Mulch on Irrigation Water Consumption, Mineral Nutrition, Yield, and Storability of Sweet Cherry Author: le Roux, Jac, Bai, Jinhe, Yin, Xinhua, Huang, Xiao-Lan, Long, Lynn E., Seavert, Clark F., Jaja, Ngowari This is a scanned version of a published article. The original can be found at: http://horttech.ashspublications.org/. To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work. Close

• 40. [Article] Using infrared canopy temperature and leaf water potential for irrigation scheduling in peppermint (Mentha piperita L.)

  Several methods of infering plant water stress for irrigation scheduling are based upon measurements of the environment in which the plants grow. These measurements include parameters such as soil water ...

  Citation × Citation Citation Abstract Copy Title: Using infrared canopy temperature and leaf water potential for irrigation scheduling in peppermint (Mentha piperita L.) Author: Gallardo, Ivan T. Several methods of infering plant water stress for irrigation scheduling are based upon measurements of the environment in which the plants grow. These measurements include parameters such as soil water content, air temperature, pan evaporation and incident radiation. It is hypothesized that improved estimates of plant water deficit can be obtained by direct measurements made on the plants. The main objective of this study was to test the performance of measurements of canopy temperature and leaf water potential for irrigation scheduling. This study seeks to establish whether a correlation exists between these monitoring methods and measurements of soil moisture content, leaf area, and evapotranspiration. The experiments were conducted in first-year peppermint irrigated at five different rates. Canopy and air temperatures were measured with a hand-held infrared thermometer. Leaf water potential was measured with a pressure bomb. A non-stressed baseline for the difference between canopy temperature and air temperature using data from well-watered plants was used together with the vapor pressure deficit to determine the crop water stress index (CWSI). The results of this study show that the CWSI is well correlated to evapotranspiration deficit and is useful for irrigation scheduling. The relationship between leaf area yield and CWSI in peppermint was described by a quadratic function. Leaf water potential varied during the day in such a way that it was not possible to establish a relationship with water stress, differences in soil moisture content, or different irrigation levels. Leaf water potential was influenced by the daily weather conditions and represented the current demand more than the cumulative demand. The results of this study indicate that mid-day pressure bomb measurements cannot be used in irrigation scheduling. Predawn measurements of leaf water potential were stable, were well correlated with the different irrigation levels and soil moisture content, and therefore may be useful in irrigation scheduling. Title: Using infrared canopy temperature and leaf water potential for irrigation scheduling in peppermint (Mentha piperita L.) Author: Gallardo, Ivan T. Several methods of infering plant water stress for irrigation scheduling are based upon measurements of the environment in which the plants grow. These measurements include parameters such as soil water content, air temperature, pan evaporation and incident radiation. It is hypothesized that improved estimates of plant water deficit can be obtained by direct measurements made on the plants. The main objective of this study was to test the performance of measurements of canopy temperature and leaf water potential for irrigation scheduling. This study seeks to establish whether a correlation exists between these monitoring methods and measurements of soil moisture content, leaf area, and evapotranspiration. The experiments were conducted in first-year peppermint irrigated at five different rates. Canopy and air temperatures were measured with a hand-held infrared thermometer. Leaf water potential was measured with a pressure bomb. A non-stressed baseline for the difference between canopy temperature and air temperature using data from well-watered plants was used together with the vapor pressure deficit to determine the crop water stress index (CWSI). The results of this study show that the CWSI is well correlated to evapotranspiration deficit and is useful for irrigation scheduling. The relationship between leaf area yield and CWSI in peppermint was described by a quadratic function. Leaf water potential varied during the day in such a way that it was not possible to establish a relationship with water stress, differences in soil moisture content, or different irrigation levels. Leaf water potential was influenced by the daily weather conditions and represented the current demand more than the cumulative demand. The results of this study indicate that mid-day pressure bomb measurements cannot be used in irrigation scheduling. Predawn measurements of leaf water potential were stable, were well correlated with the different irrigation levels and soil moisture content, and therefore may be useful in irrigation scheduling. Close