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Obsolete cotton cultivars are useful genetic resources: Obsolete cultivars are known as important genetic resources that have
the potential to provide genes for resistance to emerging diseases and
environmental stresses. By comparing the agronomic performance of obsolete
and modern cotton hybrids, we found that obsolete cultivars are also important
sources of lint yield potential expressed through non-additive genetic
effects. Our study suggests that genetic lint yield potential can be increased
by using obsolete cultivars and alternative breeding methods that capture
the positive effects of non-additive gene action. More Information: Heterotic Effects in Topcrosses...
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Improving the precision of cotton strain evaluation trials on variable
soils: Inherent soil variability in fields where cotton strain evaluation trials
are conducted can reduce the ability of researchers to identify superior
strains. We developed a method to account for soil variability and increase
the precision of measuring a strain’s agronomic performance. Using this
method, scientists can improve the precision of cultivar evaluation trials
and provide growers with dependable cultivar performance data. More Information: Improving the precision of cotton...
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Sampling Depths For Fertilizer and Lime Recommendations: Tillage tools that loosen compacted subsoils while retaining surface
residues are widely used in conservation tillage systems in the Southeast
USA. Fertilizer recommendations in these fields can be based on samples
that are 6 inches deep. For lime recommendations, a shallower sampling
depth appears to be more useful. More Information: Recommendations in Conservation Tillage...
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Release of PD 99035 and PD 98066: In 2007, the Coastal Plains Soil, Water, and Plant Research Center
officially released two Upland cotton germplasm lines with superior fiber
quality. The lines provide public and private breeders genetic resources
for concurrent improvement of fiber quality and yield performance in Upland
cottons targeted for the southeastern United States. The lines also serve
as genetic resources for improving fiber quality in environments across
the Upland cotton belt of the United States. More Information:
Notice of Release
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Phosphorus Fertilizer from Swine Waste: In the new swine manure treatment process developed at the Coastal
Plains Soil, Water, and Plant Research Center (see pages under manure management
on this website), phosphorus is recovered from the liquid portion of the
manure as calcium phosphate. Our studies indicate the calcium phosphate
can be used as a fertilizer for soils needing this nutrient to grow plants. More Information: Agronomic Effectiveness of Calcium Phosphate...
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Cultivar Response to Supplemental Water: Does genetic variation exist for cultivar lint yield and fiber quality
response to supplemental water? We identified specific germplasm lines
responsive and non-responsive to irrigation for lint yield, yield related
traits, and fiber quality. The identified germplasm lines can be used
to develop: 1) cultivars targeted for irrigated or non-irrigated production
environments, and 2) cultivars with stability to differential water availability. More Information: Genetic variation for yield and fiber...
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