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 6 of 6 for “"soil spatial variability"”.
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Soil Spatial Variability: Structures, Models, and Their Effects on Crop Yield Variability
… variables accounted for more than 80% of total soil variability. Component regression accounted for about 52%, and 39% of soybean and corn yields variability respectively. Particle size distribution and organic matter by influencing moisture and nutrient dynamics, were the most important factors …
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Simulação do fenômeno de infiltração em modelos chuva-vazão
… natural saturation K sat - were estimated from soil characteristic curves (matric potential x moisture retention). These curves can be obtained through Rawls, Brakensiek and Saxton's (1982) regression models, using particle size distribution, bulk density, organic matter percentage, and moisture …
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Spatial Variability Analysis and Reclamation of Saline-Sodic Soils in the Northern Great Plains
… to the development of sodic and saline/sodic soils in the Northern Great Plains. The objectives of this dissertation were: 1) determine the impact of surface chemical treatments and cover crop on crop yields and soil remediation; 2) determine and describe soil spatial variability and develop a …
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Numerical modeling of a bridge system & its application for performance-based earthquake engineering
… to lateral spreading. In most of these cases, soil pile-structure interaction (SPSI) has played an important role. SPSI is affected by soil conditions (e.g., competent soil or liquefiable soil) and loading conditions (e.g., earthquake intensity, motion characteristics, and shaking orientation). …
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Quantitative multifactor analysis of planter settings and row unit design for corn stand establishment in precision agriculture
… technologies, challenges associated with variability in seed placement accuracy, seed depth, and overall population uniformity persist. This variability is attributed to intricate interactions among planter operational parameters, soil heterogeneity, and the design of mechanical …
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SPATIAL VARIABILITY OF THERMAL PROPERTIES IN RECLAMATION COVER SYSTEMS
Soil cover systems are an integral part of a mine reclamation program and are increasing in area. Knowledge of temperatures and thermal properties in the cover system provide important information regarding the energy balance, thermal regime, as well as preliminary insight into soil water content. …