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... The Coastal Plains Soil, Water, and Plant Research Center has been monitoring spatial yield in a test field since 1985, using a conventional corn-wheat-soybean rotation most of that time. Observations of variation in soil and crop response that correlate with yield variation suggest that crop water relations may be the key feature that causes spatial variability in yield for the Southeastern Coast ...
... Producing clean renewable energy and reducing climate change are important and interrelated issues. Corn stover is targeted as a potential non-food bioenergy feedstock, especially in the Midwest United States. Crop residue management impacts soil water and temperature dynamics, which in turn can impact many soil processes. Stover harvest is expected to reduce soil cover and has the potential to re ...
... Our work on applications of near-infrared spectroscopy (NIRS) to entomological problems is reviewed. 1) Using an automated NIRS system, we were able to differentiate between uninfested kernels and kernels infested with late-instar larvae of three stored-product insect pests. The ability to rapidly scan individual kernels indicates potential for automated segregation of infested kernels from bulk g ...
... The SE US Coastal Plain has unique characteristics that require specialized techniques to explain yield variations and to develop management zones. This paper discusses several new methods to estimate yield variations for the development of management zones. Four techniques were developed based on the following: yield maps, black and white bare ground aerial photos, soil survey maps, and automated ...
... In the U.S. Southern High Plains, dairies have expanded and have increased the regional demand for forage and silage. The objectives were to measure water use and determine crop coefficients for corn (Zea mays L.) and forage sorghum (Sorghum bicolor (L.) Moench) produced for silage on the Southern High Plains. Water use was measured with large, precision weighing lysimeters in 2006 and 2007. Both ...
Zea mays; canopy; soil water content; fertilizer rates; corn; precision agriculture; irrigation rates; grain yield; temperature; nitrogen fertilizers; South Carolina
Abstract:
... Efficient management of irrigation and N-fertilizer requires knowledge of soil variability and crop response to these inputs. Automated measurements can be used to indicate plant stress throughout the growing season and may help indicate timing and amount needed of these inputs. In 1999, a 6-ha centre pivot, modified to provide site-specific irrigation, was used to impose irrigation and N-fertiliz ...
... Fumonisin B1 (FB1) a mycotoxin produced by certain Fusarium molds, consists of two tricarballylic acid groups esterified to a 20 carbon aminopentol backbone (HFB1). The occurrence of HFB1 in corn based foods is suspected, primarily because of the ubiquitous nature of FB1 in corn. A competitive direct enzyme linked immunosorbent assay (CD-ELISA) was developed for the rapid analysis of HFB1. The CD- ...
... Greenhouse gas (CO2, CH4, and N2O) emissions were measured from a field experiment in which pre-plant swine effluent application methods were evaluated for no-till corn grain production. The treatments included a control, an inorganic fertilizer treatment that received 179 kg N/ha as urea ammonium nitrate (UAN), and three methods of swine effluent application at a rate of 200 kg N/ha through surfa ...
agroecosystems; pest management; insect pests; simulation models; corn; Diabrotica barberi; insect ecology; life cycle (organisms); Great Plains region
... The following notes were made daring July, August, and September 1917, over an area of some twenty square miles, in the extreme south‐western angle of Bessarabia, bounded by the Lower Danube and the Pruth. They are necessarily scanty, for the military position often forbade the use even of binoculars, but no bird has been included unless I was well assured of its identity. For the most part the co ...