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 41 for “"Row crop"”.
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Optimization of Row-Crop Production on Terraced Lands
Made available in DSpace on 2014-12-14T06:37:10Z (GMT). No. of bitstreams: 1 7915420.pdf: 6758427 bytes, checksum: 70b16865b814551f7fa5c2dc8e06c52f (MD5) Previous issue date: 1979
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Autonomous ground-based robotic navigation for an agricultural row crop environment
… robotic system for use in an agricultural row crop environment. The performance of the navigational system was evaluated by measuring the offset of the robot’s path to a predetermined path. It is found through a total of ten field tests that utilizing highly accurate GPS systems results in …
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Assessment of perennial bioenergy buffers within a row crop production system
… to achieve long-term sustainability (e.g. crop productivity potential) and minimal downstream effects (e.g. externalities such as eutrophication and hypoxia). One approach to addressing these challenges is through the development and implementation of multifunctional landscape designs which …
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Soil erosion and conservation potential of row crop farming in mountainous landscapes of South Korea
… of food by providing the environment for plant growth. However, soils worldwide became highly threatened by human induced degradation, especially as a consequence of accelerated erosion by water during recent decades. In consideration of climate change and an increasing food demand of a rising …
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Row crop environments provide an all-you-can-eat buffet and pesticide exposure to foraging honey bees
… For example, agricultural landscapes, such as a row crop system, are necessary for our food production, but they may cause poor nutrition in bees from a lack of available nectar and pollen. Row crops are largely wind or self-pollinated, and while previous studies have focused on the impact of …
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Effectiveness of naturally-occurring riparian forest buffers and grass filter strips at buffering concentrated flow from row crop fields to streams in northeast Missouri
… from the survey examining 74 CFPs occurring in row crop fields found that natural forest buffers dispersed flow from 80% of CFPs before they reached the stream, and grass filter strips dispersed 100%. It was estimated that 473 metric tons of soil moved to the riparian buffers via CFPs since the …
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Frontiers in alley cropping: Transformative solutions for temperate agriculture
Annual row crop systems dominate agriculture around the world and have considerable negative environmental impacts. Incremental improvements to the prevailing system have been the primary focus of efforts to reduce these negative impacts, though are likely insufficient in solving the ecological …
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The Influence of Switchgrass Establishment on Soil Organic Matter Pools in an Agricultural Landscape
… particularly carbon and nitrogen. Conventional row-crop agriculture accelerates the decomposition of soil organic matter, contributing to atmospheric carbon and declining soil fertility. Planting perennial warm season grasses is a useful management alternative to row crop agriculture because …
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Avian breeding ecology in soybean fields: does no-till provide any benefits?
… the Midwest is in agriculture production, with row crops being the most prevalent. Most row crops have replaced grasslands, resulting in declines of their constituent bird communities. Previous research has shown that tillage regimes can affect the suitability of row crop fields as wildlife …
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Biophysical economic analysis of nutrient and sediment management practices in the Mississippi Alluvial Valley
… and poorly drained soils tend to increase row crop agriculture nutrient and sediment effluent loads. Best management practices help reduce row crop production environmental pollution. This dissertation looked at nutrient and tillage management practices that could help farmers address …
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Producer Preferences for Alternative Irrigation Practices in the Arkansas Delta
… scheduling, flowmeters, and more efficient row crop water application systems will allow producers to better manage water resources. We find relatively large, positive relationships between belonging to a peer network of the same irrigation practice and participation in that practice. …
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Social Organization, Natal Dispersal, Survival, and Cause -Specific Mortality of Red Foxes in Agricultural and Urban Areas of East-Central Illinois
… foxes with low (0--20%) and high (80--100%) row-crop percentages, and higher capture weights experienced higher survival. Juveniles from larger litters, low capture body fat, and fewer dispersal days had higher survival. Adult survival (0.35) was higher than juvenile survival (0.24). Yearly …
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Nematode Community Structure and Indicators of Biologically-Based Fertility: Influence of Management During Transition to Certified Organic Production
… a trial with three transition pathways (pasture, row crop, and intensive vegetable production). Three amendment approaches (manure, compost and cover crops) were used within each transition. Standard soil testing showed use of organic practices increased concentrations of available P and K, Ca, …
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Exploring Phosphorus Dynamics in Mid-Atlantic Soils: A Multi-Scale Analysis Integrating Soil Fertility and Land Management for Environmental Sustainability
… of Virginia poses significant challenges for crop nutrition and water quality. Nutrient losses from row crop agriculture and poultry litter applications have potential to cause water quality impairments affecting the environment, aquaculture, and tourism industries. To address these concerns, …
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Ring-necked Pheasant Cover Use in Eastern South Dakota
… were avoided by pheasants in summer as were row crop fields in both summer and winter. Cover values were significantly different (P≤0.05) among seasons on selected potential pheasant nesting areas within the study area. However, nest site cover density was not different than at control sites. …
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Value of Cover Crops in Suppressing Weeds and Protecting Cotton Yields and Likelihood of Residual Herbicide Carryover to Cover Crops
… to investigate the potential for using cover crops to suppress problematic weeds in cotton as well as chemical options for cover crop dessication, and sensitivity of cover crops to residual herbicides were evaluated. No differences were observed for cereal rye biomass production and …
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Conservation tillage methods for cabbage production
… deficits are major problems associated with row-crop agriculture. The objectives of this study were to assess the applicability of conservation tillage systems for cabbage production. Four tillage systems (conventional tillage, CT; no-tillage, NT; and two types of strip tillage—Ro-till, RT, …
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Estimating occupancy and abundance of shorebirds through aerial surveys in the Illinois river valley
… United States despite the high prevalence of row crop agriculture and extensive wetland loss and degradation in the region. Aerial surveys are commonly used to quantify waterfowl abundance and estimate population size, but few attempts have been made to evaluate aerial surveys for other guilds …
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Linear programming applied to a forage based cattle and sheep production system on a demonstration farm
… availability, and limited financial resources. Row crop production was an option not considered. Only variable costs of production were considered as fixed costs continue in the absence of production. Forage and livestock species used in the model were currently in existence on the farm. …
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