{"id":{"repo_id":"vt","oai_identifier":"oai:vtechworks.lib.vt.edu:10919/52172"},"canonical_url":"https://search.dev.ndltd.org/etd/vt/oai:vtechworks.lib.vt.edu:10919/52172","repository":{"repo_id":"vt","name":"Virginia Tech","base_url":"https://vtechworks.lib.vt.edu/oai/request"},"display":{"title":"Time of application and rate of depletion of sprinkler irrigation water for selected crops","abstract":"In formulating conclusions for this study it is emphasized that, in some instances, only tendencies are indicated and that further investigation on certain phases of the problem is necessary to make definite statements of facts. This study, however, warrants the following conclusions: 1. For conditions similar to those at Blacksburg, Virginia, the results of this study indicate that maximum yields of corn are obtained when the available moisture percentage is maintained by irrigation at some value between 25 percent and zero. 2 . The amount and distribution of rainfall at Blacksburg, Virginia in 1950 were such that irrigation was not profitable and even detrimental. Decreased yields of corn under irrigation showed that water was not a limiting factor in corn production and indicated a lack of oxygen for root respiration. 3. The rate of depletion of soil moisture was greater for alfalfa than for corn, wheat or burley tobacco; therefore the peak use frequency was less for alfalfa than for the other crops. 4. Burley tobacco appeared to be more sensitive to excess water than either wheat or alfalfa.","abstract_html":"In formulating conclusions for this study it is emphasized that, in some instances, only tendencies are indicated and that further investigation on certain phases of the problem is necessary to make definite statements of facts. This study, however, warrants the following conclusions: 1. For conditions similar to those at Blacksburg, Virginia, the results of this study indicate that maximum yields of corn are obtained when the available moisture percentage is maintained by irrigation at some value between 25 percent and zero. 2 . The amount and distribution of rainfall at Blacksburg, Virginia in 1950 were such that irrigation was not profitable and even detrimental. Decreased yields of corn under irrigation showed that water was not a limiting factor in corn production and indicated a lack of oxygen for root respiration. 3. The rate of depletion of soil moisture was greater for alfalfa than for corn, wheat or burley tobacco; therefore the peak use frequency was less for alfalfa than for the other crops. 4. Burley tobacco appeared to be more sensitive to excess water than either wheat or alfalfa.","abstract_has_math":false,"creators":["White, Finnie Edgar"],"institution":"Virginia Polytechnic Institute","degree_name":"Master of Science","degree_level":"masters","degree_discipline":"Agricultural Engineering","degree_department":"Agricultural Engineering","school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1951,"date_issued":"1951","date_published":"1951","updated_at":"2026-07-22T22:20:41Z","subjects":[],"languages":["en_US"],"rights":["In Copyright"],"rights_urls":["http://rightsstatements.org/vocab/InC/1.0/"],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/10919/52172","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.department","label":"Department","values":["Agricultural Engineering"]},{"key":"dc:creator","label":"Author","values":["White, Finnie Edgar"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2015-05-08T19:39:53Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2015-05-08T19:39:53Z"]},{"key":"dc:date.issued","label":"Date","values":["1951"]},{"key":"dc:publisher","label":"Institution","values":["Virginia Polytechnic Institute"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"key":"dc:type.dcmitype","label":"Dc Type Dcmitype","values":["Text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Agricultural Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["masters"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["Virginia Polytechnic Institute"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en_US"]},{"key":"dc:rights","label":"Dc Rights","values":["In Copyright"]},{"key":"dc:rights.uri","label":"Rights URI","values":["http://rightsstatements.org/vocab/InC/1.0/"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/10919/52172"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["In formulating conclusions for this study it is emphasized that, in some instances, only tendencies are indicated and that further investigation on certain phases of the problem is necessary to make definite statements of facts. This study, however, warrants the following conclusions: 1. For conditions similar to those at Blacksburg, Virginia, the results of this study indicate that maximum yields of corn are obtained when the available moisture percentage is maintained by irrigation at some value between 25 percent and zero. 2 . The amount and distribution of rainfall at Blacksburg, Virginia in 1950 were such that irrigation was not profitable and even detrimental. Decreased yields of corn under irrigation showed that water was not a limiting factor in corn production and indicated a lack of oxygen for root respiration. 3. The rate of depletion of soil moisture was greater for alfalfa than for corn, wheat or burley tobacco; therefore the peak use frequency was less for alfalfa than for the other crops. 4. Burley tobacco appeared to be more sensitive to excess water than either wheat or alfalfa."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["Master of Science"]},{"key":"dc:format.mimetype","label":"Dc Format Mimetype","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Time of application and rate of depletion of sprinkler irrigation water for selected crops"]}]}],"canonical_facts":{"dc:contributor.department":["Agricultural Engineering"],"dc:creator":["White, Finnie Edgar"],"dc:date.accessioned":["2015-05-08T19:39:53Z"],"dc:date.available":["2015-05-08T19:39:53Z"],"dc:date.issued":["1951"],"dc:description.abstract":["In formulating conclusions for this study it is emphasized that, in some instances, only tendencies are indicated and that further investigation on certain phases of the problem is necessary to make definite statements of facts. This study, however, warrants the following conclusions: 1. For conditions similar to those at Blacksburg, Virginia, the results of this study indicate that maximum yields of corn are obtained when the available moisture percentage is maintained by irrigation at some value between 25 percent and zero. 2 . The amount and distribution of rainfall at Blacksburg, Virginia in 1950 were such that irrigation was not profitable and even detrimental. Decreased yields of corn under irrigation showed that water was not a limiting factor in corn production and indicated a lack of oxygen for root respiration. 3. The rate of depletion of soil moisture was greater for alfalfa than for corn, wheat or burley tobacco; therefore the peak use frequency was less for alfalfa than for the other crops. 4. 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