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 “"continuous cultivation"”.
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Small non-coding RNA-mediated epigenetic regulation of gene expression and its implications for wheat adaptation to continuous cultivation
… most important staple crops worldwide. However, continuous wheat cultivation often leads to yield decline which poses a serious threat to sustainable wheat production. This yield decline is generally attributed to the interaction of abiotic and biotic soil stress factors as well as plant …
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Adubação orgânica do solo: a conscientização por meio de campos de multiplicação de sementes crioulas no agreste paraibano.
… where agriculture practiced on a permanent , continuous cultivation in the same area providing conditions becoming less favorable agricultural production that contribute to socioeconomic and environmental degradation in the region . This work aimed to evaluate the use of manure in production …
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Reconstructing and interpreting ancient crop management practices : ethnobotanical investigations into traditional dryland farming in northern Jordan.
… can germinate in either autumn or spring whilst continuous cultivation encourages the establishment of perennial weeds. In both cases, tilage - the number of episodes and the timing of the operations - would seem to be the key factor. The way these results can be developed in the future are …
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Assessment of change in smallholder farmers’ livelihoods due to land degradation in Ludewa district, Tanzania
… with scattered cropping implied increased continuous cultivation, shortened fallow periods, invasion of marginal lands, drying of natural springs, change in water sources, and increased migration. In absence of land management plans and none enforcement of conservation bylaws, weak and/or …
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Hunger in the Gwembe valley: A case study of Mweemba chieftaincy, 1905-1987
… resulted into loss of soil fertility due to continuous cultivation, poor and erratic rainfall, high summer temperatures, irregular flood pattern and crop ravaging animals and insects. The chapter has shown that of these agricultural production obstacles, erratic and poor distribution of …
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Identification of Pythium species inducing common bean (Phaseolus vulgaris L.) root rot symptoms and development of backcrosses to improve the level of varietal resistance to this disease
… partly explained by the intensification of the cultivation of beans, the absence of rotations, the practice of continuous cultivation of this legume, and decline in soil fertility. Although bean root rot symptoms are caused by a number of soil borne pathogens depending on environmental …
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Studies in the Continuous Tower Fermentation of Alcohol
The introduction of continuous tower fermentation for the production of beer and industrial alcohol has posed the questions; which type of yeast is most suited to the system and what conditions produce maximum performance? This study is an attempt to provide some answers. A method of selecting …
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Insect expression systems : improving intracellular and heterologous gene expression
… red was used to develop methods for scaling-up continuous cultivation of cells in an open fermenter system. This stable cell line was successfully maintained without contamination or total loss of cell viability for 4 weeks. Improving intracellular expression of foreign genes using the BES, …
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The role of schooling for heritage language learners: A case study of Turkish heritage speakers
… Conflicting views regarding the need for the continuous cultivation of language and identity are observed. The majority of the participants recognize the importance of nurturing language and culture but in ways that they primarily associate with certain institutionalized forms of teaching. …
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Towards value from waste: Bioreactor selection for the reduction of nutrient load and production of Poly-y-glutamic acid
… rates were estimated. Fed-batch room temperature cultivation was used to investigate if the biomass and PGA productivities could be maintained over extended time by feeding at the maximum glucoseutilisation rate seen during the batch cultivations. The maximum specific growth rates determined were …