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 15 of 15 for “"Dry matter accumulation"”.
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Studies on the Nature of Triazine Resistance in Weeds
… had equal leaf areas on a per plant basis, dry matter accumulation at pollination was 9% and 20% less in the resistant plants grown at 600 and 200 (mu)E(.)m('-2)s('-1), respectively. The number of chlorophylls per active photosystem II reaction center was 25 to 30% greater for chloroplasts …
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Feedback regulation of nitrogenase and response of a hypernodulating soybean mutant to increased photosynthate supply
… activity (per plant, not specific activity), and dry matter accumulation in all tissues of both genotypes. While Williams 82 responded more to light enhancement than the hypernodulating mutant, the opposite was observed under CO$\sb2$ enrichment, indicating that growth of the mutant may be more …
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The effects of rhizosphere inundation on the growth and physiology of red maple (Acer rubrum L.) seedlings derived from wet and dry sites
… grown from fruits collected from matched wet and dry sites from three physiographic regions of Virginia were flooded to test whether red maple seedlings derived from wet sites are affected differently by flooding than are seedlings derived from dry sites. Thirteen weeks of soil inundation on …
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Seedling emergence and growth of winter barley as affected by sowing date and sowing depth: a dissertation submitted in partial fulfilment of the requirements for the degree of Bachelor of Agricultural Science with Honours in the University of Canterbury
… leaves on the main stern, number of tillers and dry matter accumulation) were measured. A high level of total emergence (83-93%) resulted from all treatment combinations. Early May sowings provided rapid establishment and the highest total emergence. Seedling emergence rate and total emergence …
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Genotypic differences and water stress-induced changes in lipids of maize hybrids
… differences among the hybrids included reduced dry matter accumulation, and lower total lipid and free fatty acid concentration in the leaves and roots of B73xVA17 and A632xH96 compared to A619xH60, B73xMOl7, and B73xPA91. No differences were apparent in the frea, glycosidic or esterified steryl …
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Physiological role of mixed nitrogen nutrition in enhancing productivity of maize
… P$\sb{\rm s}$, a 5% increase in grain weight and dry matter accumulation were observed with mixed N nutrition. However, the physiological strategy used to achieve this increase varied as a function of genotype. For example, the hybrid LHE136 x LH82 increased the partitioning of dry matter to the …
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The effect of spirea aphid (Homoptera: aphididae) feeding and nitrogen fertilization on the growth of young apple trees, with comparisons to apple aphid
… leaf chlorophyll content and greenneess, growth, dry matter accumulation, and carbohydrate concentrations of young apple trees, with comparisons to apple aphid, Aphis pomi DeGeer. Trees were artificially infested and grown in an unheated greenhouse with screened ends. The spirea aphid responded …
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Nitrate and ammonium interactions in maize.
… assimilation has contributed in increased shoot dry matter accumulation in these plants. A corresponding increase in total N, total free amino acids and sugars in the leaves of these plants were observed. A positive correlation was seen between transcript levels of putative high affinity NO₃⁻ and …
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Absorção de nutrientes pela cultura de lulo (Solanum quitoense Lam. variedade septentrionale)
Este trabalho teve como objetivo determinar o acúmulo de nutrientes pela cultura de lulo desenvolvida em condições de campo. O trabalho foi realizado no período de novembro de 2010 a julho de 2011, no pomar do Fundão pertencente a Universidade Federal de Viçosa, no município de Viçosa, Estado de …
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The effect of phosphorus fertilizer and bradyrhizobium innoculation on grain yield and nutrients accumulation in two chickpea (Cicer aritienum L.) genotypes
… productivity not only depends on N2 fixation or dry matter accumulation, but also the effectiveness of nutrient partitioning to seed, a key component to overall yield. There is a dearth of information on the effect of P with rhizobial inoculation in response of nutrients accumulation in the …
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Modelling the effects of mulch application rates on cowpea growth, yield and soil water content using APSIM
… have the potential to stabilize and increase dryland crop yields in semi-arid regions of the world. Agricultural systems models worldwide are increasingly being used to explore options and solutions for food security. Agricultural Production Systems Simulator (APSIM) is one such model that …
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The growth, yield and water use responses of lentils (Lens culinaris Medic.) to irrigation
… mm to 485 mm. The water use efficiency (WUE) of dry matter (DM) production was similar for both cultivars and was unaffected by irrigation; it averaged 2.8 g/m²/mm. However, the WUE of seed yield (SY) was greater in Titore, at 0.84 g/m²/mm, than in Olympic, at 0.70 g/m²/mm. Also, unirrigated …
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Physiological aspects of relative changes in nitrogen and plant density stress tolerances over a 38-year period of US maize hybrid introductions
… Newer hybrids were known to accumulate more dry matter and nitrogen in the post-silking period, but achieving a more comprehensive knowledge of pre-silking and post-silking dynamics required further understanding of dry matter and nitrogen partitioning in individual organs, as well as their …
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Genotypic variation in water use efficiency, gaseous exchange and yield of four cassava landraces grown under rainfed conditions in South Africa
… use efficiency of cassava landraces grown in the dry environments of South Africa is limited. Therefore, the objective of the study was to determine the differences in water use efficiency, gaseous exchange and yield among four cassava landraces grown under rain-fed conditions. Two field …
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Producción y distribución de fotoasimilados en la vid (Vitis vinifera L.) durante el período de maduración : cambios en la respuesta fotosintética a la luz de las hojas por factores biológicos, ambientales y culturales
… area characterization, light’s microclimate, dry matter partitioning in vegetative and productive organs, and the photosynthetic leaf activity during the berry growing period. With this aim two trials were carried up, both located in Comunidad de Madrid, the first one with Tempranillo variety …