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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 36 for “"plant nutrition"”.
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The description and modification of children's views of plant nutrition
… was known of their prior understandings about plant activities. A three phase research programme was designed to arrive at a description of these pre-teach views (Part 1) and to use this knowledge in an action research programme which modified children's existing knowledge more effectively than …
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Understanding the Impact of Plant Nutrition on Plant-Oomycete Interactions
Plants are surrounded by various threats from the environment such as pathogens, abiotic stresses, and animal attacks. Nutrient content and distribution are essential for plant growth and development as well as plant immunity. Pathogens extract nutrients from host plants to benefit their own growth …
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Instructional Design: Development, implementation and evaluation of a teaching sequence about plant nutrition in Saudi
… implement and evaluate a teaching sequence about plant nutrition for male Saudi students aged 15-16. Considering the Saudi context, conducting a study related to developing instructional materials is likely to be beneficial as the Ministry of Education is currently reforming science education, …
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An integrated plant nutrition system (IPNS) for corn and cannabis in the Mid-Atlantic USA
… derived from different resources. The integrated plant nutrition system (IPNS) thrives tailoring plant nutrition and soil fertility management, taking advantage of the conjunctive and harmonious use of inorganic, organic and biological resources. We hypothesize that the synergetic effects of the …
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Stock plant nutrition and stem cutting water relations during propagation of four woody nursery crops
To evaluate the effects of stock plant nutrition and propagation medium moisture content on stem cutting propagation, two separate studies were conducted. In one study, stem cuttings of Juniperus horizontalis Moench ‘Wiltonii’, Rhododendron (Lindl.) Planch ‘Hino-Crimson’, and Ilex crenata …
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The Effect of Plant Nutrition on the Reproductive Rate and Susceptibility to Malathion of Two Strains of the Two-Spotted Spider Mite, Tetranychus telarius (L.)
Studies were conducted to determine the effect of plant nutrition on the reproductive rate and susceptibility to malathion of two strains of the two-spotted spider mite. The two strains of mites used as test organisms are characterized by their widely different levels of susceptibility to …
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Oxalic acid production by the ectomycorrhizal fungus Hebeloma westraliensis and its role in the nutrient acquisition and growth of Eucalyptus diversicolor in calcareous soil
… review of mycorrhizal enhancement of the mineral nutrition of host plants. Particular attention was paid to the role of mycorrhizae in acquiring P from inorganic phosphates. Two experiments were designed to study a mechanism by which the ectomycorrhizal fungus Hebeloma westraliensis can enhance …
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Effect of Microbial Exopolysaccharides in Soil on Metal Availability to Plants (Copper, Cadmium, Binding)
… metallic cations--some that are necessary for plant nutrition, and others that are pollutant metals of anthropogenic origin. This research sought the answers to three questions: (1) What is the affinity and capacity of exopolysaccharides for bound metals? (2) Do exopolysaccharides persist in …
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Economic Feasibility of Sub-surfaced Poultry Litter
… United States and a cheaper source of plant nutrition than fertilizer when proximal to application sites, the novel application of litter below the soil surface, while costly, allows for greater nutrient retention than broadcasting. Since quantifying costs and benefits of sub-surface …
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Uptake of Sulphur-35 by pasture plants from different depths in two Canterbury soils under field conditions : A dissertation submitted in partial fulfilment of the requirements for the Degree of Bachelor of Agricultural Science (Honours) in the University of Canterbury
… that the subsoil is an important source of plant nutrients. However, soil tests in New Zealand are usually made on samples from the top 15cm or so and no information is obtained concerning the subsoil fertility and its possible contribution to plant nutrition. The main aim of the present …
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Genetic Control of the Response to Sulfur, Nitrogen, and Phosphorus Supply in Arabidopsis thaliana
… known genes which were not previously related to plant nutrition. Additionally, previously undescribed genes were identified disruption of which results in changes in the anion accumulation phenotype. To characterise arabidopsis response to sulfate and/or nitrate deficiency a collection of …
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Sub-Antarctic plant-soil interactions in a changing world: plant N acquisition and growth under warming on Marion Island
… soil decomposition processes result in N-limited plant productivity and soils replete in organic N (oN, e.g., amino acids) but not inorganic N (iN, i.e., NH4 + and NO3 - ). Recent advances in our understanding of plant N use have shown that cold ecosystem plants meet the bulk of their N …
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Concentration and distribution of organic phosphorus through a grassland catchment transfer continuum
… potential to be important pools of P to support plant nutrition, as well as potential contributors to P transfer and therefore water pollution risks.
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Examination of synergism in nitrate and orthophosphate removal in bioreactors
… watersheds. Due to their important role in plant nutrition, the two main nutrients generally associated with these impacts are nitrogen and phosphorus resulting from high application rates as well as high potential for transport to receiving waters. For these reasons, there is a demand for …
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Natural zeolitites in combination with struvite precipitation technology for the recovery of nutrients from agricultural wastewaters
… to dispose of, to “resources”, useful for plant nutrition, but, despite this, 80% of municipal wastewaters globally produced are still discarded in the environment, without having been subjected to any treatment. On the other hand, the thoughtless use of excreta and derived materials for …
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The contribution of fog to the moisture and nutritional supply of Arthraerua leubnitziae in the central Namib Desert, Namibia
… the importance of fog as a source of water for plants, it is also associated with particulates that may contain essential nutrients for plants. Furthermore, dry deposition can be an important input of nutrients to many ecosystems, but without water, dust deposited on leaves or on soil is …
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Effects of Organic Soil Amendments on Soil Physiochemical and Crop Physiological Properties of Field Grown Corn (Zea mays) and Soybean (Glycine Max)
… stress through their hormone-like effects on plant metabolism. The objectives of this study were to calculate N mineralization rates of composted and non-composted organic materials used in this long-term field study, and to determine differences in soil physiochemical properties, corn and …
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Agronomic management to improve corn productivity under high-yielding environments
… corn grower makes today are: 1) which hybrid to plant, 2) what population to plant, and 3) what nitrogen (N) program to use. Hybrid selection is a critical management decision made by farmers because for any given year the spread in grain yield among current commercial hybrids that year can be …
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Characterization of ammoniumtransporters in Arabidopsis thaliana
Nitrogen is often a limiting factor for plant growth due to its heterogenous distribution in the soil and to seasonal and diurnal changes in growth rates. In most soils, NH4+ and NO3 – are the predominant sources of inorganic nitrogen that are available for plant nutrition. In this context, plants …
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Optimizing nutrient availability for high-yield corn production
… factors that affect nutrient availability to plants, ultimately influencing how well a plant can partition nutrients into the required plant tissues. In order to sustain adequate nutrient uptake, assessment of several different management factors will help determine how each would contribute …
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