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Full-Text Articles in Physical Sciences and Mathematics
Soil Heterogeneity And Its Exploitation By Plants, Robert B. Jackson
Soil Heterogeneity And Its Exploitation By Plants, Robert B. Jackson
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
In this dissertation I first examine the ability of individual plants in the field to garner localized soil nutrients. I then measure actual soil variability around perennial plants and use various statistics to quantify the scale and degree of that variability.
Soil patches on opposite sides of Pseudoroegneria spicata tussocks were treated with distilled water or a nutrient solution containing N, P, or K in three field experiments. When P was augmented in the enriched soil patches, rates of P uptake increased significantly for roots from enriched patches compared with roots in control patches. Rates of ammonium and potassium uptake …
Effects Of Polyacrylamide On Rangeland Soils And Plants, Saud Leily R. Al-Rowaily
Effects Of Polyacrylamide On Rangeland Soils And Plants, Saud Leily R. Al-Rowaily
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The objectives of this study were to determine the effects of two forms of polyacrylamide (PAM) conditioners (Cross-linked and Non-cross-linked PAM) on evaporation, saturated hydraulic conductivity, water retention, crust and crack formation of soils, seed germination, and seedling and tubeling growth.
The two PAM conditioners, 0.2% concentration by weight, were mixed with seven soils of different textures (sandy loam, silt, silty clay loam, silt loam, fine sand, medium sand, and coarse sand) to investigate the effects on evaporation, saturated hydraulic conductivity, and water retention. Soil samples of different textures were brought to field capacity and placed in a growth chamber …