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Survey And Prevalence Of Palmer Amaranth Herbicide Resistance In South Carolina, Mitchell Williams

All Theses

Palmer amaranth is a troublesome weed for growers to control, not only due to its aggressive growth characteristics that limit row-crop production, but because of its resistance to different herbicide modes of action. The first case of herbicide resistance in Palmer amaranth was detected in 1989 and has since grown to nine different herbicide classes throughout the United States. New herbicide modes of action have not been developed since the 1980s, so proper stewardship of the remaining modes of action is important for effective control of Palmer amaranth. Increased herbicide resistance from states bordering South Carolina have been reported; therefore, …

Planting Date, Seed Size, And Maturity Effects On Cotton And Soybean Growth And Yield In South Carolina, Sarah Holladay

All Dissertations

Seed size, seeding rates, pre-emergence (PRE) herbicides, planting dates, and maturity groups are all important factors that growers must consider before planting cotton or soybean. Previous research has suggested that seed size and seedling vigor are positively correlated and having greater seeding vigor may compensate for adverse planting conditions, pest and disease pressure, and potentially injury from PRE herbicides. Seeding rates and planting dates for cotton are dependent on the variety, environmental conditions, and grower goals. Planting date and maturity group selection are also important considerations for soybean growers in SC as in many cases soybean is planted in rotation …

Influence Of Potassium Fertilizer Application Timing On Cotton Production As Related To Soil Potassium On U.S. Coastal Plain Soils, Shruthy Suresh Kumar

All Theses

Understanding soil K dynamics is highly significant in cotton production owing to its prominent role in cotton fiber quality. About 31 % of cotton production in the U.S. is concentrated in SE states, with coastal plain soils having low innate K availability. Crop fertilizer-K recommendations are primarily made worldwide and across the U.S. using pre-plant STK concentrations. A literature review on cotton K studies suggests that fertilizer-K recommendations based on pre-plant STK concentrations alone need fine-tuning to meet the increasing K demands in modern cultivars, variations in crop K requirement patterns, and varied soil K supplying capacity. Studies have been …

Precision Management Of Inputs In Cotton And Soybean Production In South Carolina, Kyle Smith

All Theses

The adoption of precision agriculture technologies and developing specific product use recommendations in cotton and soybean production could help farmers reduce input costs and optimize overall farm profitability. The objectives of this research were to evaluate whether or not the use of variable rate seeding in cotton could increase profitability and to determine the rainfast interval of commonly used insecticides in cotton and soybean production. The first trial, variable rate seeding in cotton, was implemented at the Edisto Research and Education Center near Blackville, SC across five years to evaluate variable rate seeding in cotton. Results from trials in South …

An In Vitro Approach To Identify Sources Of Resistance To Fusarium Wilt Caused By Fusarium Oxysporum F. Sp. Vasinfectum Race 4 In Domesticated Cotton, Stephen Parris

All Theses

Cotton lint produced by the plants Gossypium barbadense L. (pima cotton) and Gossypium hirsutum L. (upland cotton) is the world’s leading source of renewable textiles. The fibers of the cotton plant have been woven so intricately into our society that it would be hard to imagine life without their products. Cotton breeders must then not only continue to work to improve the quality of cotton fibers (fineness, strength, dyability, etc.) but also to improve the resilience of the plant against biotic and abiotic factors. Fusarium oxysporum f. sp. vasinfectum race 4 (FOV4) is an aggressive fungal pathogen, which causes Fusarium …

Development And Evaluation Of An Automated Linear Move Fertigation System For Cotton Using Active Remote Sensing, Stewart Bell

All Theses

Optimum nitrogen (N) application is essential to the economic and environmental sustainability of cotton production. Variable-rate N fertigation could potentially help farmers optimize N applications, but current overhead irrigation systems normally lack automated site-specific variable-rate fertigation capabilities. The objective of this research was to develop and evaluate an automated variable-rate N fertigation system based on real-time Normalized Difference Vegetation Index (NDVI) measurements from crop sensors integrated with a lateral move irrigation system. For this purpose, NDVI crop sensors and a flow meter were integrated with Arduino microcontrollers and an automated fertigation system was constructed. A computer program was developed to …

Development And Assessment Of Nematode Management Zones In Cotton: Gossypium Hirsutum, William Aubrey Eubank

All Theses

Populations of plant-parasitic nematodes are difficult to manage due to their inherently sporadic nature and uneven distribution throughout a field. Soil sampling accompanied by laboratory extraction is the preferred method for estimating densities and locations of nematodes within a field. The uneven and sporadic nature of nematodes make them well suited for zone management in row crops, provided that effective zones can be defined. Effective zone definition for precision agriculture requires that differences in factors between zones are large and differences within zones are small.

This study compared methods of defining zones based on physical soil properties, soil SSURGO data, …

Development Of A Sensor-Based, Variable-Rate Fertigation Technique For Overhead Irrigation Systems, Phililp Williams

All Dissertations

Irrigated land in South Carolina has increased at a rate of about 4,047 hectares per year over the past two decades. With this increase in irrigated land comes the ability to gain higher yields by applying nutrients through irrigation water. Therefore, many growers apply nutrients through irrigation systems, known as fertigation.

On average, South Carolina growers apply approximately 100 kg/ha nitrogen (N) on cotton for a total of 32 million kg annually which totals $4.4 million annually. To stay competitive in the global market, it is increasingly important for growers to reduce crop input costs while maximizing yields. For example, …

Glufosinate Tolerance Of Widestrike And Liberty-Link Cotton Varieties And The Recoverability Of Upland Cotton Following Terminal Removal, Jason Sweeney

All Theses

Sweeney, Jason Allen. Glufosinate Tolerance of WideStrike¨ and LibertyLink¨ Cotton Varieties and the Recoverability of Cotton Following Terminal Removal. (Under the direction of Dr. Michael A. Jones).
To evaluate the effects of topical application of glufosinate (Liberty 280SL, 24.5% glufosinate-ammonium salt) on cotton varieties with WideStrike¨ and LibertyLink¨ technologies, two field experiments were conducted in 2011 and 2012 at the Pee Dee Research and Education Center (PDREC) in Florence, SC. In the first experiment, five WideStrike¨ cotton varieties (Phytogen [PHY] 367WRF, PHY 375WRF, PHY 440W, PHY 499WRF, and PHY 565WRF) and three LibertyLink¨ cotton varieties (FiberMax [FM] 1773LLB2, FM 1845LLB2, …

Evaluation And Adjustment Of Usda Wasde Cotton Forecasts, David Tysinger

All Theses

The dynamic and volatile nature of agricultural markets causes individuals to rely on forecasts in their decision-making. WASDE cotton forecasts are shown to be especially volatile as cotton is one of the most trade dependent commodities in the world. Therefore, its evaluation requires us to look beyond U.S. WASDE categories and evaluate forecasts for China and the World.
This study will use data from monthly WASDE balance sheets for upland cotton for the U.S, China and World over 1985/1986 through 2008/2009 including unpublished price forecasts. The results of this study will provide information that can be used to improve the …

Modeling Nitrogen Loss From Regional Switchgrass Agriculture, Saumya Sarkar

All Theses

A water quality modeling study was conducted to determine and compare nitrogen loss from agricultural systems growing switchgrass and cotton in the southeastern USA. The water quality impacts were modeled at the plot scale and at the watershed scale. The Soil and Water Assessment Tool (SWAT) was used to replicate field conditions observed at switchgrass research plots at Pee Dee Research and Educational Center at Florence, South Carolina. The plot scale modeling suggested that in the early years of growth there is significant nitrogen loss from switchgrass to streamflow and groundwater but they are significantly less as the switchgrass matures. …

Statement About Cotton Acreage Permits In Sumter National Forest, Strom Thurmond

Strom Thurmond Collection, Mss 100

No abstract provided.

Statement On Reduction In Cotton Support Prices, Strom Thurmond

Strom Thurmond Collection, Mss 100

No abstract provided.

Telegram To Agriculture Secretary Ezra Benson About Cotton Price Supports, Strom Thurmond

Strom Thurmond Collection, Mss 100

No abstract provided.

Suspension Of Japanese Cotton Goods Exports, Strom Thurmond

Strom Thurmond Collection, Mss 100

No abstract provided.

Cotton Classification In South Carolina, Strom Thurmond

Strom Thurmond Collection, Mss 100

No abstract provided.

Support Program For Weathered Cotton, Strom Thurmond

Strom Thurmond Collection, Mss 100

No abstract provided.

Price Reduction Of Cotton, Strom Thurmond

Strom Thurmond Collection, Mss 100

No abstract provided.

Agriculture Department's Cotton Export Policy, Strom Thurmond

Strom Thurmond Collection, Mss 100

No abstract provided.

Senate Bill Regarding Cotton Export Program, Strom Thurmond

Strom Thurmond Collection, Mss 100

No abstract provided.

Getting Higher Prices For Cotton Seed In South Carolina, Strom Thurmond

Strom Thurmond Collection, Mss 100

No abstract provided.