A5019038551- Soil Carbon and Nitrogen Dynamics
- Mycorrhizal Fungi and Plant Interactions
- Soil and Water Nutrient Dynamics
- Soil Management and Crop Yield
- Crop Yield and Soil Fertility
- Plant Pathogens and Fungal Diseases
- Fungal Biology and Applications
- Plant nutrient uptake and metabolism
- Microbial bioremediation and biosurfactants
- Forest Ecology and Biodiversity Studies
- Plant-Microbe Interactions and Immunity
- Soil erosion and sediment transport
- Peatlands and Wetlands Ecology
- Soil and Unsaturated Flow
- Microbial Community Ecology and Physiology
- Ecology and Vegetation Dynamics Studies
- Legume Nitrogen Fixing Symbiosis
- Weed Control and Herbicide Applications
- Toxic Organic Pollutants Impact
- Agronomic Practices and Intercropping Systems
- Soil Geostatistics and Mapping
- Rangeland and Wildlife Management
- Turfgrass Adaptation and Management
- Molecular Biology Techniques and Applications
- Nematode management and characterization studies
University of Nebraska–Lincoln
2015-2024
Barkatullah University
2023
Indian Institute of Soybean Research
2023
Chinese Academy of Sciences
2016
University of Alberta
1994
University of British Columbia
1990-1991
Abstract The relationship between organic matter (OM) lability and temperature sensitivity is disputed, with recent observations suggesting that responses of relatively more resistant OM to increased could be greater than, equivalent to, or less than labile OM. This lack clear understanding limits the ability forecast carbon (C) cycle changes. Here, we derive a novel approach (denoted Q 10− q ) accounts for changes in quality during decomposition use it analyze data from three independent...
Abstract Cropping and tillage management can increase atmospheric CO 2 , N O, CH 4 concentrations, contribute to global warming destruction of the ozone layer. Fluxes these gases in vented surface chambers, water‐filled pore space (WFPS) temperature survace soil were measured weekly from a long‐term winter wheat ( Triticum aestivum L.)‐fallow rotation system under chemical (no‐tillage) mechanical (noninversion subtillage at 7 10 cm or moldboard plowing 15 cm) follow compared with those...
Maintaining or improving soil properties is becoming increasingly important to sustain modern agriculture under increasing demands preserve biodiversity and environmental quality. Enhancing the inherent capacity of a buffer changes against anthropogenic stresses extreme climatic events such as droughts, intense rainstorms, heat waves, floods also priority. Managing organic carbon (SOC) through optimized management practices one strategy enhance ecosystem services. Increasing C storage in not...
Previous studies have demonstrated benefits of individual cover crop species, but the value diverse mixtures has received less attention. The objectives this research were to determine effects spring‐sown mixture diversity and mechanical termination method on and/or cash productivity, soil moisture N, profitability in an organic cropping system. An experiment was conducted between 2009 2011 near Mead, NE, where two (2CC), four (4CC), six (6CC), eight (8CC) or a summer annual weed included...
Abstract Global maize production alters an enormous soil organic C ( SOC ) stock, ultimately affecting greenhouse gas concentrations and the capacity of agroecosystems to buffer climate variability. Inorganic N fertilizer is perhaps most important factor within maize‐based systems due its effects on crop residue mineralization. Using a continuous cropping system with 13 year gradient (0–269 kg ha −1 yr that created large range in inputs (3.60–9.94 Mg dry matter ), we provide first agronomic...
Bacilli are commonly used as plant growth-promoting agents but can be limited in effectiveness to certain crop and soil environments. The objectives of this study were (1) identify Bacillus strains that consistent promoting the growth corn, wheat, soybean (2) determine whether physiological traits expressed vitro predictive promotion efficacy/consistency for selecting effective strains. Twelve isolated from wheat rhizospheres evaluated greenhouse pot tests with nonsterile their effects on...
ABSTRACT Accumulation of soluble salts resulting from fertilizer N may affect microbial production 2 O and CO in soils. This study was conducted to determine the effects electrical conductivity (EC) water content on five soils under intensive cropping. Surface maize fields were washed, repacked brought 60% or 90% water‐filled pore space (WFPS). Salt mixtures added achieve an initial situ soil EC 0.5, 1.0, 1.5 2.0 dS m −1 The cores incubated at 25°C for 10 d. Average decreased with increasing...
Abstract Little is known about the relative contributions of episodic tillage and precipitation events to annual greenhouse gas emissions from soil. Consequently, we measured carbon dioxide (CO 2 ), nitrous oxide (N O), methane (CH 4 ) fluxes soil in wheat‐fallow cropping system western Nebraska using vented surface chambers, before immediately after wetting with 5.1 cm water, during fallow period 1995/1996. Replicated management treatments included no‐tillage, subtillage, plow representing...
The uncertainty associated with how projected climate change will affect global C cycling could have a large impact on predictions of soil stocks. purpose our study was to determine various decomposition and chemistry characteristics relate organic matter (SOM) temperature sensitivity. We accomplished this objective using long‐term incubations at three temperatures (15, 25, 35°C) pyrolysis molecular beam mass spectrometry (py‐MBMS) 12 soils from 6 sites along mean annual (MAT) gradient...
The diversity-productivity, diversity-invasibility, and diversity-stability hypotheses propose that increasing species diversity should lead, respectively, to increased average biomass productivity, invasion resistance, stability. We tested these three in the context of cover crop mixtures, evaluating effects mixture on aboveground biomass, weed suppression, Twenty forty treatments were replicated or four times at eleven sites using eighteen representing each from six pre-defined functional...
The relationship between inorganic fertilization and soil aggregation is not well understood. We studied cumulative nitrogen (N) impacts on aggregation, organic C (SOC), pH, their relationships under irrigated rainfed experiments in Nebraska after 27 28 yr, respectively. dominant series were Crete silt loam at the site, Coleridge silty clay site. continuous corn (Zea mays L.) chisel plow (CP) ridge till (RidgeT) receiving 0, 75, 150, 300 kg N ha−1 yr−1 corn–soybean [Glycine max (L.) Merr.]...
The North Central Education and Research Activity Committee (NCERA-59) was formed in 1952 to address how soil organic matter formation management practices affect structure productivity. It is this capacity that we comment on the science supporting quality associated health assessment for agricultural lands with goal of hastening progress important field. Even though suite indicators being applied by U.S. efforts closely mirrors 'minimum data set' developed recommended mid-1990s, question...
Crop rotations have well-known aboveground and belowground benefits. At regional to continental scales, the unifying mechanisms of how diversified alter soil organic matter (SOM) dynamics not been demonstrated. We assessed increasing crop rotational diversity across a soil-climate gradient affected integrated response SOM chemistry, microbial community composition, its enzymatic potential degrade SOM. Agroecosystems with same (all sampled during corn phase) shared similarities in molecular...
We exploited the unique ecological niche of oil fly larval guts to isolate a strain Staphylococcus haemolyticus which may be most solvent-tolerant gram-positive bacterium yet described. This organism is able tolerate 100% toluene, benzene, and p-xylene on plate overlays saturating levels these solvents in monophasic liquid cultures. A comparison membrane fatty acids by gas chromatography after growth media with without toluene showed that cells continuously exposed solvent proportion anteiso...
Stratification of nutrient availability, especially P, that develops with continuous no‐till (NT) can affect runoff concentration and possibly uptake. The effects composted manure application one‐time tillage NT on the distribution soil chemical properties, root colonization by arbuscular mycorrhizae (AM), plant P uptake were determined. Research was conducted Typic Argiudoll Mollic Hapludalf soils under rainfed corn ( Zea mays L.) or sorghum [ Sorghum bicolor (L.) Moench.] rotated soybean...