J. M. Powell
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View article: Afforestation on agricultural land in England: Applying the Theoretical Domains Framework and Behaviour Change Wheel to identify the enablers of change within farmer behaviour
Afforestation on agricultural land in England: Applying the Theoretical Domains Framework and Behaviour Change Wheel to identify the enablers of change within farmer behaviour Open
Increasing woodland creation and tree planting on agricultural land requires significant changes in farmer behaviour. Understanding the underlying factors influencing farmers' behaviour can help to inform the design and development of effe…
View article: Farming and Ranching through Wildfire: Producers' Critical Role in Fire Risk Management and Emergency Response
Farming and Ranching through Wildfire: Producers' Critical Role in Fire Risk Management and Emergency Response Open
Wildfires increasingly threaten California’s agricultural sector, posing serious risks to farming, ranching, and food systems. We conducted a survey of 505 California farmers and ranchers affected by wildfires between 2017 and 2023. Main f…
View article: Farming and ranching through wildfire: Producers’ critical role in fire risk management and emergency response
Farming and ranching through wildfire: Producers’ critical role in fire risk management and emergency response Open
Wildfires increasingly threaten California’s agricultural sector, posing serious risks to farming, ranching, and food systems. We conducted a survey of 505 California farmers and ranchers affected by wildfires between 2017 and 2023. Main f…
View article: Farming and Ranching through Wildfire: Producers' Critical Role in Fire Risk Management and Emergency Response
Farming and Ranching through Wildfire: Producers' Critical Role in Fire Risk Management and Emergency Response Open
Wildfires increasingly threaten California’s agricultural sector, posing serious risks to farming, ranching, and food systems. We conducted a survey of 505 California farmers and ranchers affected by wildfires between 2017 and 2023. Main f…
View article: Farming and Ranching through Wildfire: Producers' Critical Role in Fire Risk Management and Emergency Response
Farming and Ranching through Wildfire: Producers' Critical Role in Fire Risk Management and Emergency Response Open
Wildfires increasingly threaten California’s agricultural sector, posing serious risks to farming, ranching, and food systems. We conducted a survey of 505 California farmers and ranchers affected by wildfires between 2017 and 2023. Main f…
View article: Nonlinear models of 15N partitioning kinetics in late-lactation dairy cows from individually labeled feed ingredients
Nonlinear models of 15N partitioning kinetics in late-lactation dairy cows from individually labeled feed ingredients Open
Few studies have examined the N kinetics of individual feeds with stable isotope tracing. We hypothesized that N partitioning to milk and excreta pools as well as the rates of the processes that drive this partitioning would differ for alf…
View article: Soil greenhouse gas flux and nitrogen mineralization following manure application from tannin‐fed dairy cows
Soil greenhouse gas flux and nitrogen mineralization following manure application from tannin‐fed dairy cows Open
Growing concerns about environmental impacts of dairy farms have driven producers to address greenhouse gas (GHG) emissions and nitrogen (N) losses from soil following land application of dairy manure. Tannin dietary additives have proved …
View article: Estimating Excreted Nutrients to Improve Nutrient Management for Grazing System Dairy Farms
Estimating Excreted Nutrients to Improve Nutrient Management for Grazing System Dairy Farms Open
Improving nutrient management in grazing system dairy farms requires determining nutrient flows through animals, the placement of cows within farms and potential for collection, and the re-use and loss of nutrients. We applied a model inco…
View article: Nutrient Intake, Excretion and Use Efficiency of Grazing Lactating Herds on Commercial Dairy Farms
Nutrient Intake, Excretion and Use Efficiency of Grazing Lactating Herds on Commercial Dairy Farms Open
Estimating excreted nutrients is important for farm nutrient management, but seldom occurs on commercial grazing system farms due to difficulties in quantifying pasture intake. Nitrogen (N), phosphorus (P), potassium (K), sulphur (S), calc…
View article: Effects of feeding a quebracho–chestnut tannin extract on lactating cow performance and nitrogen utilization efficiency
Effects of feeding a quebracho–chestnut tannin extract on lactating cow performance and nitrogen utilization efficiency Open
The effects of feeding a quebracho-chestnut tannin extract mixture on performance and nitrogen (N) utilization were assessed with 36 multiparous lactating Holstein cows (mean ± standard deviation; 706 ± 59 kg of body weight; 126 ± 20 d in …
View article: Symposium review: Uncertainties in enteric methane inventories, measurement techniques, and prediction models
Symposium review: Uncertainties in enteric methane inventories, measurement techniques, and prediction models Open
Ruminant production systems are important contributors to anthropogenic methane (CH4) emissions, but there are large uncertainties in national and global livestock CH4 inventories. Sources of uncertainty in enteric CH4 emissions include an…
View article: Invited review: Sustainable forage and grain crop production for the US dairy industry
Invited review: Sustainable forage and grain crop production for the US dairy industry Open
A resilient US dairy industry will be underpinned by forage and crop production systems that are economically, environmentally, and socially sustainable. Land use for production of perennial and annual forages and grains for dairy cattle m…
View article: Greenhouse gas and ammonia emissions from digested and separated dairy manure during storage and after land application
Greenhouse gas and ammonia emissions from digested and separated dairy manure during storage and after land application Open
Manure management at dairy production facilities, including anaerobic digestion (AD) and solid-liquid separation (SLS), has shown strong potential for the abatement of greenhouse gas (GHG) and ammonia (NH3) emissions. However, previous stu…
View article: Environmental degradation ‘sustainability’ and the Murray-Darlling basin
Environmental degradation ‘sustainability’ and the Murray-Darlling basin Open
Much of Australia’s agriculture depends on the Murray-Darling Basin, but the Basin ‘s land and water resources are now seriously stressed. A shift to sustainable use of these resources requires lower rates of exploitation. This shift will …