Management of beneficial and/or essential trace elements, such as Se and Zn, is challenging, and it is complicated by the fact that the margin of safety between the levels that will cause dietary deficiency, and those that result in toxicity, is narrow. This research focused on …
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An alternative to synthetic nitrogen (N) fertilizer is the use of legumes with rhizobia bacterial symbionts that fix soil atmospheric N into plant-available forms. In this study we evaluated biological nitrogen fixation by strains of Rhizobium leguminosarum associated with breed…
This study is aimed at addressing the capability of using remote sensing data in detecting and tracking soil salinization variability using a series of experimental methodologies. In a controlled experiment, the spectral reflectance changes associated with salt crust formation o…
Poultry litter is an important nutrient source in crop production. However, the traditional practice of broadcasting poultry litter on the soil surface could result in nutrient losses in runoff as well as substantial ammonia volatilization losses, which could adversely affect bo…
Biochar —a carbon byproduct of thermal, anaerobic decomposition of dried biomass—is being proposed as a beneficial soil amendment, capable of improving various agronomic parameters in agroecosystems. While research studies abound on biochar impacts in soils and crops of humid re…
Practical solutions to soil pollution by the petroleum industry are still to be fully realised. With new, unresolved and recurring cases, remediation options that are readily available, cost effective and environmentally friendly are required. Analytical methods for quick and ea…
Cementitious Stabilization has been widely used to improve the strength and durability of granular materials for the construction and rehabilitation of pavement structures. Improved mechanical properties and durability of the stabilized materials combined with relatively low cos…
Forests play a central role in global biogeochemical cycling by storing carbon (C) and retaining nutrients. Yet, we have limited understanding of how shifts in forest composition (owing to global environmental changes) will affect ecosystem functioning. A long history of researc…
Groundwater contamination has many sources, the routine agricultural application of fertilizers and pesticides are recognized as significant sources. This field study was initiated and designed to evaluate if there were differences among different irrigation technologies on wate…
Soil biota account for ~25% of global biodiversity and underpins a wide range of ecosystem services. Here defined as soil-dwelling bacteria, archaea, fungi, protists, animals, and viruses, soil biota have often been overlooked and generalised in biodiversity surveys and studies …
This thesis investigates whether or not track workers living at a railroad station in Inyo County, California, cultivated gardens. Kearsarge, the site chosen for this investigation, was a station on the Carson & Colorado/Southern Pacific Narrow Gauge Railroad from 1883 until 196…
Grasslands over a quarter of land free area and due to large carbon (C) stock they represent a key global C pool. Grassland soil C sequestration is an alternative method for reduction of atmospheric carbon dioxide (CO2) which can also deliver other benefits including greater eco…
Herbivory by migratory animals in high-latitude ecosystems is known to impact greenhouse gas emissions from soils. However, few studies quantify the relationships between changes herbivores make to plant communities and soil conditions, and the biological interactions soil organ…
Nitrate contamination of surface and groundwater has become a serious concern in many agricultural areas throughout the world. The major source of nitrate contamination is believed to be nitrogen fertilizer from agricultural fields. Best Management Practices have been developed …
Soil properties functionally associated with soil quality are largely controlled by active organic carbon. In this study a simple test of active carbon was evaluated as a of soil quality. Sixty-one soils representing a wide range of properties were analyzed for total and active …
This study mainly deals with agricultural practices and farmers' strategies to adapt to diverse and complex agro-ecological and socio-economic environments in a selected village in Bangladesh. It seeks to elucidate the complex choices of the new agricultural technology introduce…
Liquefaction is a major earthquake-induced hazard that has been studied extensively through the years but still poses significant challenges to researchers and practitioners, even for level-ground free-field conditions. Case histories, laboratory tests at different scales, from …
More than 150 year after the Irish potato famine, blight caused by Phytophthora infestans (Mont.) de Bary has re-emerged as a major disease worldwide. In Morocco, tomatoes (Lycorpersicum esculentum Mill.) and potatoes (Solanum tuberosum L.) have become an important segment of th…
The pollution of soils by trace elements and heavy metals is a grave environmental problem, mainly due to their toxic and accumulative properties. The levels of lead, cadmium, copper, chromium, nickel, zinc and cobalt, extractable with 0.5 M acetic acid, have been determined in …