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 131 for “"Growth and Yield"”.
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Soybean Growth and Yield Response to Seeding Rate in Virginia
… has increased dramatically with the introduction and adoption of herbicide-resistant cultivars, generating interest from growers to reduce seeding rates to the lowest possible level that does not affect yield. Research indicates that greater seeding rates are needed to maximize yield under …
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Rhizobia inoculant effects on bambara groundnut growth and yield in Namibia
… in Africa after groundnut (Arachis hypogea) and cowpea (Vigna unguiculata). It is normally grown in poor soils, is drought tolerant, and has a high potential for nitrogen fixation. Despite that, Bambara groundnut yields are on a gradual decline due to a combination of abiotic and biotic …
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A comparison of forest growth and yield models for inventory updating
A system of loblolly pine growth and yield models was developed which used database files as input. Using database files as direct input created a compatible link between the growth and yield models and a Geographic Information System (GIS). Since growth and yield models can be used to update …
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A growth and yield prediction model for thinned stands of yellow- poplar
Analysis and evaluation of the simultaneous growth and yield equations presented by Beck and Della-Bianca (1972) for predicting basal area growth and cubic-foot volume growth and yield in yellow-poplar stands after a single thinning indicated that a separate set of coefficients was required for …
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Stand dynamics, growth, and yield of genetically enhanced loblolly pine (Pinus taeda L.)
… about 60 years with focus on improving timber yield, wood quality, and pest and disease resistance. Advances in techniques of genetic selection, breeding, and propagation of planting material have made it possible to achieve genetic gains that are likely to result in significant changes in …
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Soybean growth and yield response to interplant competition relief in various plant density environments
Soybeans have the ability to regulate growth and yield component production in response to changes in plant population and competition. Previous research has addressed these issues from various aspects, however, there is a lack of information regarding how interplant competition affects plant size …
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Statistical studies of the relationships between terminal growth and yield in the York apple
… if any, that exist between terminal growth and yield, but also to ascertain the statistical methods that may be best adaptable.
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Estimating the coefficients in a system of compatible growth and yield equations for Loblolly pine
In this thesis the five equation system of growth and yield equations originally developed by Clutter (1963) is examined. The system is redeveloped algebraically to form a truly algebraically compatible system. Three methods of estimating the coefficients were examined. In the first method, three …
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The Effect of Planting Patterns and Population Densities on Growth and Yield of Maize and Wheat
Made available in DSpace on 2014-12-10T17:12:48Z (GMT). No. of bitstreams: 1 7020917.pdf: 6115157 bytes, checksum: 528c801af4174722ed955577000fb088 (MD5) Previous issue date: 1970
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Effects of tillage and mulching on selected soil properties, growth and yield of sunflower (Helianthus annuus L.)
Excessive and unnecessary tillage without residue retention can degrade the soil’s physical quality, decrease soil organic carbon contents and crop yields. Although the benefits of improved tillage methods and mulching have been reported in literature, little information is available on South …
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Effect of NPK basal fertilizer, nitrogen top dressing and season on growth and yield of Cucurbita argyrosperma
… grown for its edible shoots, flowers, immature and mature fruits as well as seeds, which provide proteins, vitamins, edible oils and minerals. The objective of this study was to investigate the effect of NPK basal fertilizer, nitrogen top dressing and seasonal variation on the agronomic traits …
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Simulating the effects of nitrogen and phosphorus on the growth and yield of maize in Vhembe District, Limpopo Province
Maize is the main staple food in South Africa and its production in the country constitute 50 percent of the output in Southern African Development Community (SADC) region. This study was conducted to determine the effect of nitrogen (N) and phosphorus (P) on maize growth and yield and to use the …
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Effects of Simulated Acid Rain on Growth and Yield of Field-Grown Corn and Soybeans (Glycine Max, Zea Mays)
… help determine the effects of acid rain on corn and soybean growth and production. Two corn (Zea mays L.) and two soybean (Glycine max L.) cultivars were exposed to six simulated rain acidity levels throughout the 1983 and 1984 growing seasons. The field experiments were conducted on a Flanagan …
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The response of symbiotic performance, growth and yield of chickpea (Cicer arietinum L. ) genotypes to phosphorus fertilizer rates and rhizobial inoculation
… (Cicer arietinum L) is adapted to cool-seasons and its organs are of high nutritive value and serve as cheap sources of protein, especially in developing countries. Chickpea crop is mainly grown for human consumption, animal feed and for medicinal purposes. The introduction and promotion of …
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The effect of post-harvest ammonium sulphate application, planting time and sucker size on plant growth and yield of queen pineapple, ananas comosus
Queen pineapple plant mortality as well as poor growth and development are some of the major problems facing the Hluhluwe pineapple producers. Approximately 20% of the plants do not produce fruit, due to mortality or poor growth. Queen pineapple plantings are currently established from suckers …
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Growth and Yield-Per-Recruit Modeling of Spot (<i>Leiostomus xanthurus</i>) in the Chesapeake Bay, and a Comparison of Biological Reference Points
… have a high natural mortality rate (M = 0.9) and fast growth (K = 0.6). This combination of M and K makes spot relatively impervious to growth overfishing as determined by yield-per-recruit modeling. Because spot are nearly impervious to growth overfishing, management thresholds based on …
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Effect of planting depth and cutting orientation on growth and yield of sweet potato (Ipomoea Batatas L.(LAM) cultivars for small scale production in Verulam
… of South Africa. However, low storage root yields in small scale farming are attributed to a number of factors including poor selection of cultivars and possibly unsuitable cultivation practices. Therefore, two experiments were conducted over two growth seasons (2014/2015 and 2015/2016) to …
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