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 10 of 10 for “"Maize cultivation"”.
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Soil Stable Carbon Isoptope Analysis of Landscape Features at Aguateca, Guatemala
… of the Classic period (1700-1050 B.P.) relied on maize agriculture to support their populations. The agricultural systems they employed to produce that maize varied in form and degree of intensity, with more productive forms of agriculture needed in the Late Classic period (1350-1050 B.P.) to …
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Maize Streak Virus: diversity and virulence
… in the 16th century. The steady spread of maize cultivation since then has made it the most important cereal crop in Africa today. Whereas improved maize genotypes and agricultural techniques enable yearly yields above 10 tons hectare-1 in the developed world, yearly yields across Africa …
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Characterization of spatial distribution of soil organic carbon stocks in selected land use types and landscapes in Chama District
… ranged from 0.02 % to 2.62 % with soils under maize cultivation having the highest levels and soils in game management areas having the lowest levels. The high levels in soils under maize production could be attributed to the use of chemical fertilizers and high dry matter production associated …
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Characterization of spatial distribution of soil organic carbon stocks in selected land use types and landscapes in Chama District
… ranged from 0.02 % to 2.62 % with soils under maize cultivation having the highest levels and soils in game management areas having the lowest levels. The high levels in soils under maize production could be attributed to the use of chemical fertilizers and high dry matter production associated …
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A Spatial Suitability Assessment of Maize and Tobacco in Response to Temperature and Rainfall Changes in Zimbabwe
… the sensitivity of important crops in Zimbabwe, maize, and tobacco, in response to changes in temperature and rainfall patterns. This research paper used a sensitivity analysis of climate variables; rainfall, and temperature, using historical climate data derived from WorldClim for the period …
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Fields and Forests: A Stable Isotope Perspective on the Subsistence Strategies of Past Amazonian Peoples
… debate converged upon strategies based on manioc cultivation and fish protein and the functional division of the Amazon territory between productive (várzea) and unproductive (terra firme) areas. These early remarks, however, were based mainly on limited ethnographic analogy supported by scarce …
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Effekte des Anbaus von Bt-Mais auf Nichtzielarthropoden der Krautschichtfauna : Monitoringorganismen und praktikable Erfassungsmethoden
… to determine possible unintended effects of Bt-maize (Mon810, cultivar Novelis) cultivation on nontarget organisms of the arthropod community compared with an isogenic maize line (cultivar Nobilis) with and without an insecticide treatment. Furthermore, suitable monitoring organisms and …
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Eignung unterschiedlicher Monitoring-Methoden als Grundlage zum Risk Assessment für Agrarsysteme : am Beispiel einer biozönologischen Reihenuntersuchung und einer Einzelfallstudie
… Risk Assessment of genetically modified maize. The second study was complementary to a research project to evaluate the impact of pesticides in arable landscapes.Study 1: Effects of cultivation of genetically modified Bt maize on epigeic arthropods (Araneae; Carabidae). A field study was …
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Soil conservation in relation to maize productivity on sub-tropical red soils in Yunnan Province, China
… pressure and lack of flat land necessitate cultivation of steep slopes. The Yunnan Government prohibits cultivation of slopes >25°, however policy enforcement would result in food shortages in the Province, due to a lack of suitable land <25°. Therefore, the most appropriate way to curb soil …