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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 27 for “"Double-crop"”.
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Relay- and double-crop production systems for wheat
Cover crops are important to provide organic matter to soils, diversify cropping systems, and provide economic benefits if the correct cropping systems are utilized. Relay-intercrop production involves overlapping growth cycles of two or more crops. This production system is common with legumes …
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Double-crop corn (zea mays) weed control in Virginia
Double-crop production of corn (Zea mays L.) for grain following the harvest of small grain is not currently practiced in Virginia. Historical precipitation and evapotransportation data indicate that delayed corn planting could result in a higher probability of moisture during critical periods of …
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Full-Season and Double-Crop Soybean Response to Potassium Fertilizer
… and piedmont soils of Virginia, especially in double-crop systems. Nineteen full-season and 14 double-crop soybean experiments were conducted in 2013 and 2014 in Virginia and northeastern North Carolina to determine full-season and double-crop soybean (with wheat straw remaining or removed) …
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Accelerated breeding for winter wheat profitability in a wheat-soybean double-crop system
… produced in a wheat–soybean (Glycine max L.) double-crop system, where profitability depends on combining high grain yield with acceptable test weight and sufficiently early maturity to enable timely soybean planting. This dissertation aims to understand and accelerate genetic gain for SRWW …
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Double-Crop Soybean Vegetative Growth, Seed Yield, and Yield Component Response to Agronomic Inputs in the Mid-Atlantic, USA
… and profitability are the primary reasons for double-cropping soybean with small grain in the Mid-Atlantic, USA. Reduced double-crop yield can be attributed to: delayed planting that results in a shortened growing season and less vegetative growth; later-maturing cultivars that terminate main …
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Determination and Manipulation of Leaf Area Index to Facilitate Site-Specific Management of Double-Crop Soybean in the Mid-Atlantic, U.S.A.
Double cropping soybean after small grain harvest does not always allow sufficient canopy growth to maximize photosynthesis and seed yield. This is due to a shorter growing season and moisture deficits common to the Mid-Atlantic USA. Leaf area index (LAI) is the ratio of unit leaf area of a crop to …
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Long-term Residue and Water Management Effects on Soil Respiration and Soil Aggregate Stability in a Wheat-soybean, Double-crop System in Eastern Arkansas
… aestivum L.) soybean [Glycine max (L.) Merr.], double-crop system in a silt-loam soil (Aquic Fraglossudalf) in the Mississippi River Delta region of eastern Arkansas after more than six years of consistent management. To this end, soil respiration was measured every two weeks during the 2011 and …
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Studies on the Use of Herbicides for Control of Wild Garlic (Allium Vineale L.) in a Winter Wheat-Soybean Double Crop Rotation (Chlorsulfuron, Dpx T6376)
The response of wild garlic (Allium vineale L.) to two sulfonylurea herbicides, chlorsulfuron (2-chloro-N-(((4-methoxy-6-methyl-1,3,5-triazin-2-yl)amino)carbonyl)benzenesulfonamide), and DPX T6376 (methyl-2-((((4-methoxy-6-methyl-1,3,5-triazin-(2-yl)amino)carbonyl)amino)sulfonyl)benzoate), was …
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Adaptability of Soybeans to Late-Planted Environments (Isolines, Gxe, Double Cropping)
… grown in the Midwest primarily as a full-season crop and only to a limited extent as a double crop. Development of cultivars specifically adapted to double cropping has been suggested as a means to expand double-crop acreage in this area. Before initiating a separate breeding program for the …
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Influence of Selective Insecticides and Cropping System on Arthropod Natural Enemies in Soybean
… is associated with higher yields in a variety of crops. Certain aspects of soybean production can make a field more or less amenable to a robust natural enemy community. For instance, commonly used broad-spectrum insecticides which are highly toxic to most arthropods can decrease natural enemy …
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Assessment of Soybean Leaf Area for Redefining Management Strategies for Leaf-Feeding Insects
… yield potential, but the relationship between double-crop soybean LAI and yield is unknown. This research (1) evaluated minimum plot size requirements for mechanically defoliated soybean experiments using the LAI-2000 Plant Canopy Analyzer, (2) compared LAI estimates among LAI-2000 detector …
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Effect of Cropping Systems on Production and Economic Returns of Ten Vegetable Crops
Experiments were conducted with vegetable crops which are commonly grown for profit on a 5- to 10-ha farm to determine: (1) the yield and performance of these crops; and (2) the differences in cost and net return between several cropping systems. Tomato (Lycopersicon esculentum Mill. cv. Jet Star), …
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Soybean Growth and Yield Response to Seeding Rate in Virginia
… habits and maturities grown in full-season and double-crop systems to seeding rate under different yield environments; and 2) compare two seeding rates in large on-farm strip-plots to determine if the growth environment within the field affects the yield response to seeding rate. For objective …
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Influence of Several Herbicides on Visual Injury, Leaf Area Index, and Yield of Glyphosate-Tolerant Soybean <I>(Glycine max)</I>
… in 1999 and 2000 to investigate potential crop injury from several herbicides on glyphosate-tolerant soybean, and to determine the relationship between soybean maturity, planting date, and herbicide treatment on soybean injury, leaf area index (LAI), and yield. Three glyphosate-tolerant …
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Assessing Genetic and Environmental Influence on Traits Associated with Natto Quality
… and 2007 to address the influence of soybean cropping system (double crop vs. full season) and environmental factors on traits associated with natto quality. Two statistical models were used to analyze the effects of planting system and environment on agronomic traits such as yield, maturity, …
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Water Quality Impacts of Cover Crop/Manure Management Systems
Crop production, soil system, water quality, and economic impacts of four corn silage production systems were compared through a field study including 16 plots (4 replications of each treatment). Systems included a rye cover crop and application of liquid dairy manure in the spring and fall. The …
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Double-Cropped Soybean Response to Various Wheat Stubble Managements
… aestivum L.) stubble management preceding double-crop soybean [Glycine max (L.) Merr.] have been reported; however, little work has been done in the Mid-Atlantic region of the United States. The objectives of this study were to observe the effects of wheat stubble management (WSM) on …
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Alternative and Improved Cropping Systems for Virginia
… and the mid-Atlantic region is more than double the total production. Producing more feed grains in this region could generate more profit for grain growers and lower costs for end-users. Increased feed grain production in this region will necessitate improved corn (Zea mays L.) management …
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Investigation of winter wheat sowing date management and genetic architecture of malting quality in winter barley and milling/baking performance in soft red winter wheat
… are widely grown as winter annual grains in a double crop rotation with soybean (Glycine max, L. Merr.) in much of the U.S. Improved management strategies and the development cultivars that meet the quality requirements of higher value end-use markets is important to increase production and …
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Exploring the potential of chaff lining in Virginia wheat and soybean production
… a narrow line. Since chaff amount increases with crop yield, studies aimed to determine how varying crop yield and the associated chaff amount will affect chaff lining control of select weed species, while also examining subsequent crop performance. Objective 1 of this work focused on wheat chaff …
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