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Understanding The Etiology Of Taproot Decline Of Soybean Caused By Xylaria Necrophora, José E. Ortiz Solórzano
Understanding The Etiology Of Taproot Decline Of Soybean Caused By Xylaria Necrophora, José E. Ortiz Solórzano
LSU Master's Theses
Taproot decline (TRD) of soybean is caused by Xylaria necrophora. However, the mechanisms by which it infects soybean and produces symptoms are unknown. Symptoms of TRD include foliar interveinal chlorosis and necrosis and root necrosis, yet X. necrophora appears to be restricted to the roots. While Xylaria species are predominantly wood decomposers, a few are pathogens. More importantly, they produce secondary metabolites (SMs) with multiple bioactivities, including phytotoxicity and antimicrobial activity. Preliminary experiments suggested that X. necrophora was producing SMs responsible for TRD symptoms. We evaluated cell-free culture filtrates (CFs) for phytotoxicity on soybeans, testing for changes in chlorophyll …
Trouble At Old River: An Economic Evaluation Of An Avulsion On United States Soybean Trade, Patrice Maria Lazard
Trouble At Old River: An Economic Evaluation Of An Avulsion On United States Soybean Trade, Patrice Maria Lazard
LSU Master's Theses
The Mississippi River is an essential asset to agricultural trade given that its existence contributes to a cost-efficient transportation system. Barge travel allows large amounts of soybeans and other bulk commodities to be transported at low costs. Currently, barge costs are the lowest relative to those of other modes. Although there has been increasing competition for soybean shares from other countries in the global market, low transportation costs of soybeans, grain, and other oilseed crops allow the United States to retain its competitive advantage in the world soybean market. The Mississippi River’s urgency to change course and possibly eliminate barge …
An Evaluation Of The Impact Of The Adoption Of The Onboard Module Building Cotton Harvest System On The Economic Competitiveness Of Cotton Production In Louisiana, Natalia Estefania Latorre
An Evaluation Of The Impact Of The Adoption Of The Onboard Module Building Cotton Harvest System On The Economic Competitiveness Of Cotton Production In Louisiana, Natalia Estefania Latorre
LSU Master's Theses
Planted acreage of cotton in Louisiana has decreased over the past several years due to higher cotton variable production costs, stagnant cotton market prices, and higher grain yields and market prices for corn and soybeans. The general objective was to determine the economic impact of the adoption and use of an onboard module building cotton harvest system on the ability of the cotton enterprise to compete for planted acreage in the mixed crop farming areas of Louisiana. Specific research objectives included the estimated of comparative ownership and operating costs for the module building harvest systems relative to existing basket/module builder …
Stochastic Trends In Crop Yield Density Estimation, David I. Maradiaga
Stochastic Trends In Crop Yield Density Estimation, David I. Maradiaga
LSU Master's Theses
The search for improved methods of estimating crop yield density functions has been a theme of recurrent research interest in agricultural economics. Crop yield density functions are the statistical instrument that generates probability estimates of yield risk, and risk is an important decision variable in production agriculture. Recent research in crop yield density estimation suggests that yield probability estimates can be sensitive to the way yield data are filtered, and if true, then the search for an “adequate filter” is warranted. Such a quest is pursued in this study. It is proposed that unit-root tests can be used to identify …