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Seedling Johnsongrass Growth In Sugarcane As Affected By Time Of Emergence (Agroecology, Sorha, Weed Potential)., Joseph Floyd Yoder Iii
Seedling Johnsongrass Growth In Sugarcane As Affected By Time Of Emergence (Agroecology, Sorha, Weed Potential)., Joseph Floyd Yoder Iii
LSU Historical Dissertations and Theses
Field studies were conducted to document seedling johnsongrass Sorghum halepense (L.) Pers. growth as influenced by date of emergence in sugarcane (Saccharum interspecific hybrids, cultivar 'CP 65-357'). The crop was in the plant cane year of growth in 1982 and 1983, and the first stubble year in 1984. The experiments were randomized complete block designs. Johnsongrass seedling emergence days were approximately three weeks apart, from April or early May through mid-July for a total of five emergence days each year. There were 36, 60, and 72 replicates for emergence days numbered 1 to 3, 4, and 5, respectively, over three …
The Population Ecology And Nutrient Transport Of Gulf Menhaden In Fourleague Bay, Louisiana (Mortality, Growth, Feeding, Production, Migration)., Linda Ann Deegan
The Population Ecology And Nutrient Transport Of Gulf Menhaden In Fourleague Bay, Louisiana (Mortality, Growth, Feeding, Production, Migration)., Linda Ann Deegan
LSU Historical Dissertations and Theses
An ecological study of the young-of-the-year of three year-classes of gulf menhaden (Brevoortia patronus) was conducted from July 1981 to December 1983 in Fourleague Bay, Louisiana. This study documented gulf menhaden population ecology and the importance of gulf menhaden in the nutrient and energy balance of estuaries. Young-of-the-year gulf menhaden immigrated in winter and moved to tidal creeks and ponds, where they remained until midsummer. They then moved into open bays, where they remained until the fall. This migration pattern coincides with sequentially available, but spatially separate, productivity peaks in marsh and open bays. In the fall, they emigrated to …