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 52 for “"Field capacity"”.
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Numerical study of improved methods of in-field capacity assessment of reinforced concrete bridges
… extremely difficult. Improving the accuracy of capacity assessments of reinforced concrete bridges when information regarding the design and construction of the bridge is limited or not available would be useful in a number of situations, including military operations and disaster response. The …
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Effect of O3 fumigation on photosynthesis and growth of quinoa and its interaction with drought and elevated CO2
… by subjecting quinoa to severe drought (10% field capacity), moderate drought (20% field capacity), watered (75% field capacity) and well-watered (90% field capacity) conditions in the ambient environment. In a separate set of experiments well-watered and drought-induced quinoa plants were …
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Starter Fertilizers for No-Till and Minimum-Till Corn
… 61 to 67$\sp\circ$F. Wetting the root zone to field capacity within 48 hours after planting enhanced the effectiveness of seed-placed fertilizers by increasing early plant growth and reducing the potential for injury.
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Pine Seedling Survival and Growth Related to Moisture Retention of Eight Texas Forest Soils
… Soil moisture retention constants nearer to field capacity tensions may give better indications of survival and development in droughty areas than moisture constants nearer to wilting point tensions. Likewise, water consumption (evapotranspiration) during favorable moisture conditions and …
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BIOCHAR AMENDMENT TO IMPROVE SOIL PRODUCTIVITY WITH PARTICULAR EMPHASIS ON THE INFLUENCE OF SOIL TYPE
… soil types, adding up to 2.5% biochar improved field capacity by up to 42% (15% on average) and available water capacity by up to 48% (22% on average), but silty soils were less responsive. BD was reduced by up to 19% (10% on average). In a three-season outdoor pot trial with spring wheat …
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The relationship between soil components and soil physical constants of some Manitoba soils
… content. These were related to apparent density, field capacity, permanent wilting percentage, available moisture (dry weight basis), available moisture (volume fraction) and moisture retained at 1/4, 1/3, 1/2, 1, 3, 7 and 15 atmospheres tension by multiple regression analyses. The relationships …
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Parameter uncertainty in nonpoint source pollution modeling
… developed for predicting saturated conductivity, field capacity, and wilting point using sand and clay content, porosity, and organic matter as regressors. Evaluation of the regression equations indicated acceptable predictions of field-scale variability in field capacity and wilting point but not …
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Solid Waste Degradation, Compaction and Water Holding Capacity
… and rapid increase in landfill volumetric capacity. It also offers significant reduction in post closure management activities as leachate treatment, LFG impact on the environment and improves the potential for land reuse. The regulatory 30 year post-closure period is believed to account …
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Physiological and genetic investigations of iron deficiency in field peas (Pisum sativum L.).
… the long term for all sensitive crops including field peas. The present study was conducted to investigate various aspects of the genetic tolerance of field pea cultivars Santi and Parafield, in particular, with the objective of providing the information to implement an efficient breeding …
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Deficit Irrigation Strategies on young orange trees (cv Tarocco Sciara)
… plant and treatments, (iii) SWC was below the field capacity, (iv) trunk diameters were quite similar among the analysed plants.
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Soilless media for seed germination and growth of tomato transplants, and for the rooting of certain herbaceous stem cuttings
… moss and sand. The available moisture, porosity,field capacity and permanent wilting point of these 2b media were determined. This information was compared with the results from the germination and growth study of tomato plants. Weblite was a constituent of the seven best media for germination. …
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Development of a continuous, physically-based distributed parameter, nonpoint source model
… the Ritchie equation. If soil moisture exceeds field capacity, the model computes percolation based on the degree of soil saturation. Nutrient losses include nitrate, sediment-bound and dissolved ammonium; sediment-bound TKN, and sediment-bound and dissolved phosphorus. A linear equilibrium is …
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The growth, yield and water use responses of lentils (Lens culinaris Medic.) to irrigation
In a field trial conducted at Lincoln, New Zealand, during 1984/85, the water relations and the growth and yield responses of lentils (Lens culinaris Medic.) to irrigation were investigated. The cultivars Titore and Olympic were sown in May (autumn) and September (spring) and were grown with or …
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Soil-Specific, Late-Season Nitrogen and Potassium Applications to Increase Corn Yields in the Mid-Atlantic Coastal Plain
… period beginning at tassel, soils must be near field capacity at the start of the period and receive above-average (75th percentile) rainfall during the period.
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Effects of soil moisture and al-nitrilotriacetate on yeild chemical composition and digestibility of ryegrass (Lolium multiflorum, L.) by meadow voles
… with two soil moisture levels (flooding and 80% field capacity) and two Al rates (0 and 135 mg/kg) as Al-NTA. Flooding increased Al, Fe, Cu, Ca and fiber and decreased dry matter yield, Mg, K and Zn concentrations. Treatment with 135 mg/kg Al had no effect on Al in plants, but decreased Ca and P …
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Can soil factors of Namibian fairy circles explain the absence of vegetation from them?
… experiments were carried out in the field and soil collected in the field (from on-, off-circle and ant nests) was analysed for nutrients, field capacity, drying rate and used in a growth experiment (using wheat) in the glasshouse of the University of Cape Town. No distinct …
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A comparison of the performance of Namibia-specific conservation and conventional tillage technologies as used for pearl millet production in northern Namibia
… The first objective is to compare the field performances compare the field performances of the two technologies each for the NSCT and CV on (i) depth of cut, (ii) width of cut, (iii) draught of the power source (iv) efficiency and v) effective field capacity under Ogongo conditions. …
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Velocity and celerity in a forested headwater catchment : a combined experimental and modelling approach
… characterised by fractured bedrock. Our field experiments proved the importance of bedrock cleavage orientation in controlling subsurface flow direction and demonstrated the importance of quantifying the extent of fractures as well as their orientation relative to dominant topographically …
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A novel hypothesis for plant capacitance
… water content. At water contents approaching field capacity, substrate capacitances were at least an order of magnitude greater than those of plant tissues. Wetting the substrate locally around a plant stem base was both necessary and sufficient to record maximum capacitance, which was …
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Atributos físicos e biológicos do solo sob diferentes condições de uso nas várzeas de Sousa (PB)
… and water retention in the soil, specifically, field capacity, wilting point, and available water. According to the results obtained, it can be seen that the biological part of the overall microbial diversity was larger in the area under native vegetation, with highlights on the fungal genus …
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