dc.contributor.author	Adcock, Clyde Wesley	en
dc.contributor.committeecochair	Abaye, Azenegashe Ozzie	en
dc.contributor.committeecochair	Abaye, Azenegashe Ozzie	en
dc.contributor.committeecochair	Alley, Marcus M.	en
dc.contributor.committeemember	Zelazny, Lucian W.	en
dc.contributor.committeemember	Baker, James C.	en
dc.contributor.committeemember	Bosch, Darrell J.	en
dc.contributor.committeemember	Martens, David C.	en
dc.contributor.department	Crop and Soil Environmental Sciences	en
dc.date.accessioned	2014-03-14T20:19:39Z	en
dc.date.adate	1999-03-11	en
dc.date.available	2014-03-14T20:19:39Z	en
dc.date.issued	1998-08-28	en
dc.date.rdate	2012-03-27	en
dc.date.sdate	1999-12-02	en
dc.description.abstract	Cotton (Gossipium hiristum, L) is a warm season perennial with indeterminant growth habit. In 1995, 42,500 and 300,000 hectares were grown in Virginia and North Carolina, respectively. Soil physical and chemical properties may limit cotton yields. The objective of this study was to; 1) determine influences of soil physical and chemical properties on yield, 2) validate existing preharvest yield estimators, and 3) determine the effect of subsoiling and/or subsurface liming on cotton development and root growth. Two hundred sites were sampled across the Coastal Plain of Virginia and North Carolina to a depth of 92 cm representing 5 major soil series. Soil samples were analyzed for selected physical and chemical properties from each horizon. Boll and plant counts were obtained while harvesting a 3-meter length of row at each site to determine yield for the 1996 and 1997 growing season. Cotton was grown in the greenhouse on 30 cm diameter cores of a soil with low subsoil pH and a hard pan to determine the effects of subsoiling and/or subsurface liming. Ninety days after planting, the cotton plants were harvested and the above ground biomass and rootmass were analyzed. Physical and chemical properties explained 52% of yield variability in 1996 and 27% in 1997. Physical and chemical properties that were significant to yield were surface bulk density, available water holding capacity, depth of the water table and Bt horizon, Mg, K, Ca, and Al content. Soil analysis for nutrient status at depths up to 45 cm were better indicators of cotton yield. Subsoiling with or without subsurface liming increased rooting depth over the untreated check. The subsurface liming reached first flower 11 days prior to the other treatments. The additional period for flowering and boll set in Virginia and North Carolina could increase potential yield.	en
dc.description.degree	Ph. D.	en
dc.identifier.other	etd-120299-154211	en
dc.identifier.sourceurl	http://scholar.lib.vt.edu/theses/available/etd-120299-154211/	en
dc.identifier.uri	http://hdl.handle.net/10919/29881	en
dc.publisher	Virginia Tech	en
dc.relation.haspart	ch3p29.pdf	en
dc.relation.haspart	appenp245.pdf	en
dc.relation.haspart	appenp144.pdf	en
dc.relation.haspart	ch4p60.PDF	en
dc.relation.haspart	AdcockDissertation.PDF	en
dc.rights	In Copyright	en
dc.rights.uri	http://rightsstatements.org/vocab/InC/1.0/	en
dc.subject	rainfall	en
dc.subject	potassium	en
dc.subject	magnesium	en
dc.subject	aluminum	en
dc.subject	calcium	en
dc.title	Cotton Yield as Related to Selected Physical and Chemical Properties of Soils of the Coastal Plain of Virginia and North Carolina	en
dc.type	Dissertation	en
thesis.degree.discipline	Crop and Soil Environmental Sciences	en
thesis.degree.grantor	Virginia Polytechnic Institute and State University	en
thesis.degree.level	doctoral	en
thesis.degree.name	Ph. D.	en

Cotton Yield as Related to Selected Physical and Chemical Properties of Soils of the Coastal Plain of Virginia and North Carolina

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