Gretchen F. Sassenrath

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Photosynthesis in domestic tomato (Lycopersicon esculentum L.) is highly sensitive to low temperature, particularly when accompanied by high light. Since previous studies have established that the inhibited plants retain photosynthetic electron transfer and ATP formation competence, we sought to identify specific steps in the photosynthetic carbon reduction(More)
Cotton (Gossypium hirsutum) flower’s showy corolla expands rapidly, then senesces quickly. Efficient opening of corollas is important for selfand cross-pollination, and indirectly lint yield. Carbohydrate relations are integral to bud water relations and growth, although they are not well understood. Soluble sugars and starch in developing floral buds and(More)
Technological advances have contributed to impressive yield gains and have greatly altered US agriculture. Selective breeding and directed molecular techniques address biological shortcomings of plants and animals and overcome environmental limitations. Improvements in mechanization, particularly of power sources and harvest equipment, reduce labor(More)
In this study, we assessed the adaptive effects of irrigation on climatic risks for three crops (maize, soybean, and wheat) at the regional scale from 1981 to 2012 in the Central US. Based on yields of 183 counties for maize, 121 for soybean and 101 for wheat, statistical models were developed for irrigated, rainfed and county-level yields. Results show(More)
This manuscript presents research results examining phosphorus (P) management in a soil–plant system for three variables: i) internal resources of soil available phosphorus, ii) cropping sequence, and iii) external input of phosphorus (manure, fertilizers). The research was conducted in long-term cropping sequences with oilseed rape (10 rotations) and maize(More)
Drivers Impacting the Adoption of Sustainable Agricultural Management Practices and Production Systems of the Northeast and Southeast United States G. F. Sassenratha; J. M. Halloranb; D. Archerc; R. L. Raperd; J. Hendricksonc; P. Vadase; J. Hansonc a USDA-ARS Crop Production Systems Research Unit, Stoneville, Mississippi, USA b USDA-ARS New England Plant,(More)
This research was conducted to develop relationships among evapotranspiration (ET), percolation (PERC), groundwater discharge to the stream (GWQ), and water table fluctuations through a modeling approach. The Soil and Water Assessment Tool (SWAT) hydrologic and crop models were applied in the Big Sunflower River watershed (BSRW; 7660 km(2) ) within the(More)
Irrigation scheduling tools are critical to allow producers to effectively manage water resources for crop production. To be useful, these tools need to be accurate, complete, and relatively reliable. The current work presents an uncertainty analysis and its results for the Mississippi Irrigation Scheduling Tool (MIST) model, showing the margin of error(More)