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 12 of 12 for “"tree crops"”.
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Managing symbiotically-fixed nitrogen on mined land for tree crops
… short term and long-term nitrogen needs of crop trees while rebuilding the soil and litter nitrogen pools and restoring a stable nitrogen cycle. The nitrogen status of two interplanting studies containing legume ground covers was examined. The first study site was mined prior to 1940 and …
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Frontiers in alley cropping: Transformative solutions for temperate agriculture
… (AC) – an agroforestry practice integrating trees with crops – as a transformative land-use solution to mitigate climate change, restore ecosystem services, and improve agricultural profitability. Through an inventory of all field experiments of AC to date, I identify several major gaps in AC …
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Xenobiotic detoxification in the navel orangeworm Amyelois transitella (Lepidoptera: Pyralidae)
… transitella, is a major pest of high-value tree crops such as pistachios and almonds. These non-native crops have been grown commercially in the United States for less than 150 years, and the acquisition by the navel orangeworm of these and other novel hosts may have been facilitated by its …
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Toxicity assessment of pesticides and biopesticides on wild and managed bees (Hymenoptera, Apoidea), and richness evaluation in mediterranean and tropical agroecosystems
… populations of wild bees were studied in two tree crops in Southern Italy, one Mediterranean (almond) and one tropical (mango), comparing species richness and abundance between integrated and organic management. Keywords: ecotoxicology; social bees; solitary bees; lethal effects; sublethal …
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Plant Growth Regulator Sprays and Girdling: Potential Horticultural Techniques to Increase Fruit Retention and Yield of Longan (Dimocarpus longan Lour.) Trees in California
… and Yield of Longan (Dimocarpus longan Lour.) Trees in California Leila Graves June 2009 The longan is a subtropical fruit tree whose popularity is growing quickly among American consumers, and thus, could become a lucrative niche market for California growers. Trees planted as part of an …
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Permaculture as farming practice and international grassroots network: a multidisciplinary study
… but may interfere with each other, and that tree crops have significantly higher returns to labor when integrated with animal production systems.
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Land use, food production, and the future of tropical forest species in Ghana
… with shifting cultivation and native canopy trees produced only around 15% as much food energy per hectare as the highest-yielding oil palm plantations. In farm mosaics where perennial tree crops dominate, food production and profits were higher, but did not reach those of oil palm …
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Land tenure, investment, land markets, off-farm employment, and rural welfare in Ethiopia
… that among sample households who did not grow tree crops on their land, 40% of them reported that land shortage is the first major problem. In this regard, the existing land tenure system can be equally restrictive for most farmers. Therefore, the results of the study suggest that, without …
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Parametric design and performance validation of low-cost, low-pressure drip emitters and irrigation systems
… of low-pressure PC online emitters (used for tree crops) designed by the MIT Global Engineering and Research Lab to reduce pumping power and energy in a series of field trials in the Middle East and North Africa. With a minimum operating pressure of 0.15 bar, these online emitters are shown to …
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Facultative mutualism between the navel orangeworm Amyelois transitella (Lepidoptera: Pyralidae) and Aspergillus flavus
… of its habit of attacking damaged or overripe tree nuts and fruits in Californian orchards. Its economic impact is increased by its common association with the highly toxigenic fungus Aspergillus flavus Link. Despite the capacity of this fungus-insect association to damage a wide variety of …
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GIS-based approach to participatory land suitability analysis for tree plantations
Tree plantations that use significant amounts of the government’s financial and human resources have been established in Indonesia. Unfortunately, the result has not been satisfactory. One of the primary reasons for this is that the government acted unilaterally in determining the locations and …
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Towards the exploitation of the American hazelnut (Corylus americana)
… in the incorporation of low-input food-producing tree species that provide economic incentives for farmers. While existing varieties and breeding selections of tree fruits and nuts provide the opportunity for initial system development and integration, their broad adaptability to the Midwest U.S. …