Search

Search Results

• 1. [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

• 2. [Article] An economic analysis of resource substitution with sprinkler irrigation systems in use in Oregon's Northern Columbia River Basin counties

  Citation × Citation Citation Abstract Copy Title: An economic analysis of resource substitution with sprinkler irrigation systems in use in Oregon's Northern Columbia River Basin counties Author: Erhabor, Patrick Osaretin Title: An economic analysis of resource substitution with sprinkler irrigation systems in use in Oregon's Northern Columbia River Basin counties Author: Erhabor, Patrick Osaretin Close

• 3. [Article] Sprinkler irrigation

  Revised May 1952. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog

  Citation × Citation Citation Abstract Copy Title: Sprinkler irrigation Author: University of Idaho. Agricultural Extension Service, Idaho Agricultural Experiment Station, State College of Washington. Extension Service, State College of Washington. Agricultural Experiment Station, Oregon State College. Federal Cooperative Extension Service, Oregon State College. Agricultural Experiment Station Revised May 1952. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog Title: Sprinkler irrigation Author: University of Idaho. Agricultural Extension Service, Idaho Agricultural Experiment Station, State College of Washington. Extension Service, State College of Washington. Agricultural Experiment Station, Oregon State College. Federal Cooperative Extension Service, Oregon State College. Agricultural Experiment Station Revised May 1952. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog Close

• 4. [Article] Offsets for stationary sprinkler systems

  Published January 1986. 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/catal...

  Citation × Citation Citation Abstract Copy Title: Offsets for stationary sprinkler systems Author: Pacific Northwest Cooperative Extension, Trimmer, Walter L., Hansen, Hugh J. Published January 1986. 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: Offsets for stationary sprinkler systems Author: Pacific Northwest Cooperative Extension, Trimmer, Walter L., Hansen, Hugh J. Published January 1986. 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

• 5. [Article] The Uniformity Coefficient a Function of Sprinkler Types, Pressures, Spacings, and Wind Conditions

  Citation × Citation Citation Abstract Copy Title: The Uniformity Coefficient a Function of Sprinkler Types, Pressures, Spacings, and Wind Conditions Author: Nduaguba, Dominic Chika Title: The Uniformity Coefficient a Function of Sprinkler Types, Pressures, Spacings, and Wind Conditions Author: Nduaguba, Dominic Chika Close

• 6. [Article] Optimum sprinkler application rates on soil of low infiltration rate

  Citation × Citation Citation Abstract Copy Title: Optimum sprinkler application rates on soil of low infiltration rate Author: Berney, James Edward Title: Optimum sprinkler application rates on soil of low infiltration rate Author: Berney, James Edward Close

• 7. [Article] Soil water ponding and its relationship to sprinkler application rates, initial moisture contents, and uniformity of storage

  Citation × Citation Citation Abstract Copy Title: Soil water ponding and its relationship to sprinkler application rates, initial moisture contents, and uniformity of storage Author: Vongsuri, Sommai Title: Soil water ponding and its relationship to sprinkler application rates, initial moisture contents, and uniformity of storage Author: Vongsuri, Sommai Close

• 8. [Article] Converting sprinkler systems to lower pressure

  Published January 1986. 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/catal...

  Citation × Citation Citation Abstract Copy Title: Converting sprinkler systems to lower pressure Author: Washington State University. Cooperative Extension, Pacific Northwest Cooperative Extension, United States. Dept. of Agriculture, Oregon State University. Extension Service, Trimmer, Walter L., University of Idaho. Cooperative Extension Service, Hansen, Hugh J. Published January 1986. 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: Converting sprinkler systems to lower pressure Author: Washington State University. Cooperative Extension, Pacific Northwest Cooperative Extension, United States. Dept. of Agriculture, Oregon State University. Extension Service, Trimmer, Walter L., University of Idaho. Cooperative Extension Service, Hansen, Hugh J. Published January 1986. 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

• 9. [Article] Sprinkler irrigation

  Published November 1951. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog

  Citation × Citation Citation Abstract Copy Title: Sprinkler irrigation Author: University of Idaho. Agricultural Extension Service, Oregon State College. Agricultural Experiment Station, Washington State College. Agricultural Experiment Station, Washington State College. Extension Service, Oregon State College. Federal Cooperative Extension Service Published November 1951. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog Title: Sprinkler irrigation Author: University of Idaho. Agricultural Extension Service, Oregon State College. Agricultural Experiment Station, Washington State College. Agricultural Experiment Station, Washington State College. Extension Service, Oregon State College. Federal Cooperative Extension Service Published November 1951. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog Close

• 10. [Article] A field plot sprinkler irrigator

  Published September 1958. 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: A field plot sprinkler irrigator Author: Oregon State College. Agricultural Experiment Station, Riley, J. Paul (John Paul), 1927-, Wolfe, John W. (John William), 1917- Published September 1958. 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: A field plot sprinkler irrigator Author: Oregon State College. Agricultural Experiment Station, Riley, J. Paul (John Paul), 1927-, Wolfe, John W. (John William), 1917- Published September 1958. 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