James A. Larson
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View article: Budget and breakeven prices of winter canola and pennycress production in Tennessee
Budget and breakeven prices of winter canola and pennycress production in Tennessee Open
Canola ( Brassica napus ) and pennycress ( Thlaspi arvense L.) are winter oilseed crops that can be used to create sustainable aviation fuel. They have been grown successfully in the Upper Midwest and Great Plains and are garnering interes…
View article: A Techno-Economic Analysis Comparing a Hammermill and a Rotary Shear System to Process Woody Biomass for Biofuel Production
A Techno-Economic Analysis Comparing a Hammermill and a Rotary Shear System to Process Woody Biomass for Biofuel Production Open
Woody biomass feedstock processing, including sorting, drying, and size reduction of biomass to provide standardized reactor-ready biomass to the biorefinery, is crucial to biofuel conversion. This study compares two comminution technology…
View article: Potential allelopathic interactions from canola and pennycress postharvest roots and stubble
Potential allelopathic interactions from canola and pennycress postharvest roots and stubble Open
Winter oilseed Brassica plants have several documented allelochemicals; however, most literature revolves around the application of seed meal to fields, or the use of aerial parts of the plant. It is not clear if these chemicals interact w…
View article: National winter oilseeds review for potential in the US Mid‐South: Pennycress, Canola, and Camelina
National winter oilseeds review for potential in the US Mid‐South: Pennycress, Canola, and Camelina Open
Winter oilseeds are cool season Brassica crops currently being grown in the upper Midwest and North‐West of the United States. They have the potential to function as dual crops when grown in rotation with corn, soybean, and small grains. T…
View article: Exploring a Standardized Training Framework That Provides Individualized Student Experiences
Exploring a Standardized Training Framework That Provides Individualized Student Experiences Open
Since modern workplaces and universities are becoming increasingly diverse, there is mounting pressure for universities to provide intercultural competency training for students. Various approaches for teaching intercultural competencies e…
View article: Biofuel Discount Rates and Stochastic Techno-Economic Analysis for a Prospective Pennycress (Thlaspi arvense L.) Sustainable Aviation Fuel Supply Chain
Biofuel Discount Rates and Stochastic Techno-Economic Analysis for a Prospective Pennycress (Thlaspi arvense L.) Sustainable Aviation Fuel Supply Chain Open
The international aviation industry has the goal to gradually reduce carbon emissions mainly by using sustainable aviation fuel (SAF). However, currently SAF cannot be produced at competitive prices relative to petroleum-based jet fuel. Pe…
View article: Farmer Interest in and Willingness to Grow Pennycress as an Energy Feedstock
Farmer Interest in and Willingness to Grow Pennycress as an Energy Feedstock Open
Pennycress can be used as a renewable biomass because its harvested seeds can be converted into biofuel, supplying, for example the aviation industry. Pennycress can be adopted as a winter cover crop to make extra profit in addition to sum…
View article: Effects of Landscape, Soils, and Weather on Yields, Nitrogen Use, and Profitability with Sensor-Based Variable Rate Nitrogen Management in Cotton
Effects of Landscape, Soils, and Weather on Yields, Nitrogen Use, and Profitability with Sensor-Based Variable Rate Nitrogen Management in Cotton Open
Farmers may be reluctant to adopt variable rate nitrogen (VRN) management because of uncertain profits. This study assessed field landscape, soil, and weather effects on optical sensing (OS)-based VRN on cotton (Gossypium hirsutum L.) N ra…
View article: Impacts of uncertain feedstock quality on the economic feasibility of fast pyrolysis biorefineries with blended feedstocks and decentralized preprocessing sites in the Southeastern United States
Impacts of uncertain feedstock quality on the economic feasibility of fast pyrolysis biorefineries with blended feedstocks and decentralized preprocessing sites in the Southeastern United States Open
This study performs techno‐economic analysis and Monte Carlo simulations (MCS) to explore the effects that variations in biomass feedstock quality have on the economic feasibility of fast pyrolysis biorefineries using decentralized preproc…
View article: Cost and Profitability Analysis of a Prospective Pennycress to Sustainable Aviation Fuel Supply Chain in Southern USA
Cost and Profitability Analysis of a Prospective Pennycress to Sustainable Aviation Fuel Supply Chain in Southern USA Open
This study evaluates biorefinery bio-oil feedstock costs at the plant gate for a prospective field pennycress (Thlaspi arvense L.) to sustainable aviation fuel (SAF) supply chain. The biorefinery would supply SAF to the Nashville, Tennesse…
View article: Effects of Enhanced Efficiency Urea on No-tillage Corn Yields and Profit
Effects of Enhanced Efficiency Urea on No-tillage Corn Yields and Profit Open
Ammonium nitrate (AN) has been an important source of fertilizer nitrogen (N) in no-tillage crop production; however, security concerns have limited the availability of AN as a source of fertilizer N. Urea is a readily available source of …
View article: Isolating phyllotactic patterns embedded in the secondary growth of\n sweet cherry (Prunus avium L.) using magnetic resonance imaging
Isolating phyllotactic patterns embedded in the secondary growth of\n sweet cherry (Prunus avium L.) using magnetic resonance imaging Open
Epicormic branches arise from dormant buds patterned during the growth of\nprevious years. Dormant epicormic buds remain on the surface of trees, pushed\noutward from the pith during secondary growth, but maintaining vascular\nconnections.…
View article: Variable-Rate Application on Fertilizer Use in Cotton Production
Variable-Rate Application on Fertilizer Use in Cotton Production Open
Precision agriculture technologies are increasingly important in cotton production because input prices continue to rise. Farmers increase input efficiency using precision agriculture technologies by adjusting inputs to match soil fertilit…
View article: Automatic Section Control Technologies and GPS Auto-guidance Systems Adoption in Cotton Production
Automatic Section Control Technologies and GPS Auto-guidance Systems Adoption in Cotton Production Open
Using data from a survey of cotton producers in 14 US states, and a bivariate probit regression, this study examined the effects of the following measured parameters on the adoption of Automatic Section Control (ASC) technologies and GPS A…
View article: Influence of Cover Crop and Tillage Systems on Optimal Nitrogen Rate for Tennessee Cotton Considering Risk
Influence of Cover Crop and Tillage Systems on Optimal Nitrogen Rate for Tennessee Cotton Considering Risk Open
Upland cotton fields have minimal amounts of crop residue after harvest to cover the soil surface, which exposes the soil and increases the risk of soil erosion. This is especially challenging in the Mid-South U.S. where cotton is commonly…
View article: Changes in the Use of Precision Farming Information Sources Among Cotton Farmers and Implications for Extension
Changes in the Use of Precision Farming Information Sources Among Cotton Farmers and Implications for Extension Open
Using information from precision farmer surveys conducted in the southern United States in 2005 and 2013, we evaluated changes in the use of precision farming information sources among cotton producers. Although Extension remains an import…
View article: TEMPORAL FREQUENCY OF SOIL TEST INFORMATION EFFECTS ON RETURNS TO POTASSIUM FERTILIZATION IN COTTON PRODUCTION
TEMPORAL FREQUENCY OF SOIL TEST INFORMATION EFFECTS ON RETURNS TO POTASSIUM FERTILIZATION IN COTTON PRODUCTION Open
Little research exists on the optimal temporal frequency between soil tests, given empirical data on potassium (K) carryover and its interaction with cotton yield. We evaluate how decreasing the temporal frequency between obtaining K soil …
View article: Temporal Frequency of Soil Test Information Effects on Returns to Potassium Fertilization in Cotton Production
Temporal Frequency of Soil Test Information Effects on Returns to Potassium Fertilization in Cotton Production Open
Little research exists on the optimal temporal frequency between soil tests, given empirical data on potassium (K) carryover and its interaction with cotton yield. We evaluate how decreasing the temporal frequency between obtaining K soil …
View article: Precision Farming Adoption Trends in the Southern U.S.
Precision Farming Adoption Trends in the Southern U.S. Open
Studies investigating temporal and geographic adoption of precision farming technologies (PFT) are valuable for researchers, consultants, and farmers to make more informed production decisions. Focusing on southern U.S. cotton producers, t…
View article: Tennessee and Mississippi Upland Cotton Producer Willingness to Participate in Hypothetical Crop Insurance Programs
Tennessee and Mississippi Upland Cotton Producer Willingness to Participate in Hypothetical Crop Insurance Programs Open
Changes under the Agricultural Act of 2014 have reconnected federally subsidized crop insurance to conservation compliance and eliminated direct payments that were tied to conservation compliance. The net effects of these changes on compli…
View article: RISK AND RETURNS OF SPRING AND FALL CALVING FOR BEEF CATTLE IN TENNESSEE
RISK AND RETURNS OF SPRING AND FALL CALVING FOR BEEF CATTLE IN TENNESSEE Open
We determined the profitability and risk for spring- and fall-calving beef cows in Tennessee. Simulation models were developed using 19 years of data and considered the seasonality of cattle prices and feed prices for least-cost feed ratio…
View article: Upland Cotton Producers’ Willingness to participate in a BMP/STAX Pilot Program
Upland Cotton Producers’ Willingness to participate in a BMP/STAX Pilot Program Open
Changes in the 2014 Farm Bill have reconnected federally-subsidized crop insurance to conservation compliance and eliminated direct payments that were tied to conservation compliance. The net effects of these changes on producers’ incentiv…
View article: Factors Influencing the Adoption of Automatic Section Control Technologies and GPS Auto-Guidance Systems in Cotton Production
Factors Influencing the Adoption of Automatic Section Control Technologies and GPS Auto-Guidance Systems in Cotton Production Open
This study examines the factors influencing the adoption of ASC technologies and AG systems among cotton producers in the Southern United Sates. The data used is from a survey of cotton producers in 14 states. Using a random intercept biva…