A5017277591- Soil Carbon and Nitrogen Dynamics
- Agronomic Practices and Intercropping Systems
- Plant nutrient uptake and metabolism
- Legume Nitrogen Fixing Symbiosis
- Climate change impacts on agriculture
- Irrigation Practices and Water Management
- Agriculture Sustainability and Environmental Impact
- Crop Yield and Soil Fertility
- Rice Cultivation and Yield Improvement
- Plant Water Relations and Carbon Dynamics
- Plant-Microbe Interactions and Immunity
- Horticultural and Viticultural Research
- Agroforestry and silvopastoral systems
- Mycorrhizal Fungi and Plant Interactions
- Plant responses to elevated CO2
- Agricultural Innovations and Practices
- Plant and animal studies
- Nematode management and characterization studies
- Soil erosion and sediment transport
- Rangeland Management and Livestock Ecology
- Gut microbiota and health
- Organic Food and Agriculture
- Agricultural risk and resilience
- Potato Plant Research
- Plant Molecular Biology Research
University of California, Davis
2016-2025
International Rice Research Institute
2012-2024
Plant (United States)
2018-2020
Lawrence Berkeley National Laboratory
2018-2019
Planta
2019
University of Guelph
2011-2015
International Potato Center
2006-2008
A grand challenge facing humanity is how to produce food for a growing population in the face of changing climate and environmental degradation. Although empirical evidence remains sparse, management strategies that increase sustainability, such as increasing agroecosystem diversity through crop rotations, may also resilience weather extremes without sacrificing yields. We used multilevel regression analyses long-term yield datasets across continental precipitation gradient assess temporal...
Cropping sequence diversification provides a systems approach to reduce yield variations and improve resilience multiple environmental stresses. Yield advantages of more diverse crop rotations their synergistic effects with reduced tillage are well documented, but few studies have quantified the impact these management practices on yields stability when soil moisture is limiting or in excess. Using weather data obtained from 31-year long term rotation trial Ontario, we tested whether...
Abstract Background Rhizosphere microbial communities are key regulators of plant performance, yet few studies have assessed the impact different management approaches on rhizosphere microbiomes major crops. shaped by interactions between agricultural and host selection processes, but often consider these factors individually rather than in combination. We tested impacts (M) effects (R) community structure co-occurrence networks maize roots collected from long-term conventionally organically...
Abstract Increasing soil organic carbon (SOC) via inputs is a key strategy for increasing long‐term C storage and improving the climate change mitigation adaptation potential of agricultural systems. A trial in California's Mediterranean revealed impacts management on SOC maize‐tomato wheat–fallow cropping was measured at initiation experiment year 19, five depth increments down to 2 m, taking into account changes bulk density. Across entire m profile, systems did not with addition N...
Metagenomes encode an enormous diversity of proteins, reflecting a multiplicity functions and activities
Abstract Diversifying agriculture by rotating a greater number of crop species in sequence is promising practice to reduce negative impacts production on the environment and maintain yields. However, it unclear what extent cereal yields change with rotation diversity external nitrogen fertilization level over time, which functional groups crops provide most yield benefit. Here, using grain data small cereals maize from 32 long-term (10–63 years) experiments across Europe North America, we...
Continuously flooded rice systems are a major contributor to global production and food security. Allowing the soil dry periodically during growing season (such as with alternate wetting drying irrigation - AWD) has been shown decrease methane emissions, water usage, heavy metal accumulation in grain. However, effects of AWD on yields variable not well understood. A two-year study was established quantify impacts range treatments differing severity (degree between flooding events) yield (as...
Abstract Maize domestication and breeding have resulted in drastic well documented changes aboveground traits, but belowground effects on root system functioning rhizosphere microbial communities remain poorly understood, despite their critical importance for nutrient water acquisition. We investigated the community composition structure of ten Zea mays accessions along an evolutionary transect (two teosinte, three inbred maize lines, five modern hybrids) grown depleted soil from a low input...
Abstract Climate change adaptation requires building agricultural system resilience to warmer, drier climates. Increasing temporal plant diversity through crop rotation diversification increases yields of some crops under drought, but its potential enhance drought resistance and the underlying mechanisms remain unclear. We conducted a manipulation experiment using rainout shelters embedded within 36-year no-till in temperate climate measured suite soil developmental eco-physiological traits...
Small genes (<150 nucleotides) have been systematically overlooked in phage genomes. We employ a large-scale comparative genomics approach to predict >40,000 small-gene families ∼2.3 million genome contigs. find that small genomes are approximately 3-fold more prevalent than host prokaryotic Our enriches for translated microbiomes, suggesting the identified coding. More 9,000 encode potentially secreted or transmembrane proteins, 5,000 predicted anti-CRISPR and 500 antimicrobial proteins. By...
Abstract Diversified crop rotations have been suggested to reduce grain yield losses from the adverse climatic conditions increasingly common under climate change. Nevertheless, potential for change adaptation of different rotational diversity (CRD) remains undetermined. We quantified how affect small and maize yields CRDs in 32 long‐term (10–63 years) field experiments across Europe North America. Species‐diverse functionally rich more than compensated anomalous warm conditions, long dry...
There is interest in discovering root traits associated with acclimation to nutrient stress. Large systems, such as adult maize, have proven difficult be phenotyped comprehensively and over time, causing target missed. These challenges were overcome here using aeroponics, a system where roots grow the air misted solution. Applying an agriculturally relevant degree of low nitrogen (LN) stress, 30-day-old plants responded by increasing lengths individual crown (CRs) 63%, compensated 40%...
Growing multiple crops in rotation can increase the sustainability of agricultural systems and reduce risks from increasingly adverse weather. However, widespread adoption diverse rotations is limited by economic uncertainty, lack incentives, information about long-term outcomes. Here, we combined 36,000 yield observations 20 North American cropping experiments (434 site-years) to assess how greater crop diversity impacts productivity complete their component under varying growing...