Global ETD Search
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 51 for “"cropping system"”.
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Intercropping dynamics in a perennial Kernza cropping system
… compromise the sustainability and resiliency of cropping systems. These issues include soil erosion, nutrient runoff, declining soil organic matter stocks, and poor water relations. Two major efforts to perennialize landscapes have been initiated: agroforestry and perennial herbaceous crop …
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Legume integration and nutrient management impacts on soil health and cropping system productivity
… in sub-Sharan Africa and in smallholder farming systems globally. Thus, proper management of soil is critical for supporting long-term crop production and addressing multiple sustainability challenges in these agricultural systems. Integration of legumes into cropping systems, especially when …
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Influence of Selective Insecticides and Cropping System on Arthropod Natural Enemies in Soybean
… potentially damaging pest populations in agroecosystems. An abundant and diverse natural enemy community 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 …
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Assessing population yields and developing an agronomic cropping system for Silflower (Silphium integrifolium), a perennial oilseed crop
… of silflower in a dual-use oilseed and forage cropping system by comparing biomass collected at four dates early in the growing season to mimic mowing. Silflower has potential as a dual-use crop, but there are tradeoffs between forage and seed production.
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The impact of allelopathic winter rye (Secale cereale L.) and hairy vetch (Vicia villosa Roth) residues on a vegetable cropping system
… of allelopathic cover crops on a vegetable cropping system. A study was also undertaken to investigate the impact of cover crop residues on weed management. Winter rye (Secale cereale L. cv. Wheeler) and hairy vetch (Vicia villosa Roth cv. Oregon Crown) were interseeded in the fall. The …
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Investigating host plant selection of harlequin bug, Murgantia histrionica (Hahn), in order to improve a trap cropping system for its management
… investigated for control of HB, including trap cropping and systemic neonicotinoid insecticide applications. Potential trap crops, mustard (Brassica juncea "Southern Giant Curled" ), rapeseed (B. napus "Athena"), rapini (B. rapa) and arugula (Eruca sativa) were preferred over collard (B. …
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N₂ fixation, plant mineral nutrition and C metabolites in cowpea/maize cropping systems
… assimilation by component species in the cropping system, and (3) to determine the effects of cropping system on C metabolites. At harvest the dry mass of both cowpea and maize were highest in sole crops. There was a significant difference in % nitrogen of maize and cowpea plants from the …
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Agronomic and Economic Comparison of Full-Season and Double-Cropped Small Grain and Soybean Systems in the Mid-Atlantic USA
… of its greater profitability. The barley-soybean cropping system is not a new concept in the region, but the literature is outdated. New agronomic and economic data that directly compares full-season soybean, barley-soybean, and wheat-soybean systems using modern cultivars and management practices …
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Total factor productivity of tropical soybean-maize systems: the case of the safrinha crop system in Mato Grosso, Brazil
… of the tropical soybean-maize succession cropping, which have not received much attention by researchers, and thus are not well understood. This paper measures changes in agricultural total factor productivity (TFP) from the succession cropping system of soybean and maize in Mato Grosso, …
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Crop modeling for assessing and mitigating the impacts of extreme climatic events on the US agriculture system
<p>The US agriculture system is the world’s largest producer of maize and soybean, and typically supplies more than one-third of their global trading. Nearly 90% of the US maize and soybean production is rainfed, thus is susceptible to climate change stressors such as heat waves and droughts. …
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Adaptability of Soybeans to Late-Planted Environments (Isolines, Gxe, Double Cropping)
… 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 development of Midwestern double-crop cultivars, information is needed concerning genotype by cropping system …
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Alternative and Improved Cropping Systems for Virginia
… Growing grain sorghum in this niche in the cropping system instead could result in greater overall feed grain production. In order to assess the performance of grain sorghum as an alternative in common cropping systems, four field experiments were established at the Southern Piedmont …
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Management impacts on GHG emissions and yield for an organic soybean crop
… can be profitable and also improve soil ecosystem services through sustainable agronomic practices. However, because most chemical inputs are restricted from organic agriculture, producers rely heavily on tillage for weed control, which in turn can be detrimental to soil health. The use of …
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The effect of varying mixtures of soybean and cereals on the landing rates of aphid vectors and spread of soybean mosaic virus (SMV) and maize dwarf mosaic virus (MDMV)
… non-persistently transmitted viruses in the same cropping system. This study is important because it begins to identify the factors underlying virus spread, thereby contributing to the already existing management strategies for virus diseases and their vectors.
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Response of Soil Properties to 23-25 Years of Diverse Crop Rotations and Tillage Systems in South Dakota, USA
<p>Diverse cropping systems and no-till (NT) are beneficial in improving soil organic carbon (SOC) and other soils properties. The present study was conducted to evaluate the interactions and impacts of long-term tillage and diverse crop rotation systems on soil quality indicators that include a …
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Double-crop corn (zea mays) weed control in Virginia
… randomized complete block design with cropping system as the main plot and herbicide treatment as the subplot. Herbicide treatments included combinations of nonselective herbicides for no-till establishment and/or preemergence residual herbicides and/or selective postemergence …
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Effects of plastic mulch, row cover, and cultivar selection on growth of tomatoes (Lycopersicon esculerntum Mill.) in high tunnels
… characteristics, BHN 543 could fit into a double cropping system for growers wanting to replant their high tunnels with a fall crop. Full season yield of grade 1 and 2 fruit combined was significantly greater for Merced than any other cultivar. The heirloom tomato cultivar Brandywine produced …
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Relay- and double-crop production systems for wheat
… 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 seeded into small grains; …
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Virginia Integrated Pest Management Expert for Wheat
… weeds, and insects into a decision support system that would provide potential outbreak risk and pest control information to the Comprehensive Resource Planning System (CROPS). In addition, the system stands alone as an educational tool for farmers and Extension personnel. This is a …
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Recycling Aquacultural Waste through Horticultural Greenhouse Production as a Resource Recovery Approach
For intensive production systems like the Blue Ridge Aquaculture (BRA), based in Martinsville, VA, there are significant economic incentives to reuse the waste by diverting it into a cropping system that would increase the total productivity and total resource-reuse efficiency, and decrease the …
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