Srx AgriculturePub Date : 2010-03-14DOI: 10.3814/2010/725381
J. Sij, D. Bordovsky, David L. Jones, J. E. Slosser
{"title":"Utilizing Subsurface Drip Irrigation and Conservation Tillage in Cotton Production Systems","authors":"J. Sij, D. Bordovsky, David L. Jones, J. E. Slosser","doi":"10.3814/2010/725381","DOIUrl":"https://doi.org/10.3814/2010/725381","url":null,"abstract":"Ground water resources for irrigated agriculture are becoming increasing limited in semiarid regions of the world. Subsurface drip irrigation (SDI) and a no-till conservation tillage system were evaluated over 3 years on cotton (Gossypium hirsutum, L.) production and fiber quality in north Texas. Subsurface drip irrigation significantly increased cotton yields over that from furrow irrigation in 2 of 3 yr. When averaged over 3 yr, the cover crop treatments on 1 and 2 m drip line spacing and a 100% ET replacement yielded numerically more than the companion treatments without a cover crop. Across years, the SDI treatments significantly increased loan values by an average of $ 0.045 k g − 1 over furrow-irrigated cotton. Within SDI, deficit irrigation did not appear to affect cotton yield in proportion to the amount of restricted irrigation. In 2003, a 50% reduction in ET replacement under conventional tillage reduced yield only 22%, indicating that a 100% ET replacement may not be necessary to produce economically acceptable yields. Results from this study provide preliminary evidence that cover crops may actually prove beneficial under SDI systems and could play a role in developing best management practices that incorporate conservation tillage practices.","PeriodicalId":354672,"journal":{"name":"Srx Agriculture","volume":"91 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117294747","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Srx AgriculturePub Date : 1900-01-01DOI: 10.3814/2010/868723
W. Molin, Josie A. Hugie
{"title":"Effects of Population Density and Nitrogen Rate in Ultra Narrow Row Cotton","authors":"W. Molin, Josie A. Hugie","doi":"10.3814/2010/868723","DOIUrl":"https://doi.org/10.3814/2010/868723","url":null,"abstract":"A field study was conducted to investigate the effects of population density and nitrogen rate on yield, growth, and fiber response of ultra narrow row (UNR) cotton. Stand loss occurred at densities greater than 22 plants m − 2 and nitrogen rates greater than 56 kg ha − 1 and stand loss exceeded 20% at harvest. Seed cotton yields were similar across populations and rates of 56, 112, and 168 kg ha − 1 . Nitrogen rates greater than 56 kg ha − 1 resulted in greater vegetative growth based on increased plant height and number of nodes. These results indicate that populations of 22 plants m − 2 and nitrogen rates of 56 kg ha − 1 were sufficient for maximum yields in UNR cotton under our conditions. However, at higher nitrogen rates, boll formation increased at lower nodes with no corresponding change in yield. Higher nitrogen rates may promote earliness and distribute yield across more fruiting sites.","PeriodicalId":354672,"journal":{"name":"Srx Agriculture","volume":"1993 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128632220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}