D. Brian Arnall
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View article: Split nitrogen applications provide no benefit over a single well timed application in rainfed winter wheat
Split nitrogen applications provide no benefit over a single well timed application in rainfed winter wheat Open
Optimizing nitrogen (N) fertilization strategies in winter wheat requires understanding the combination of application timings and rates. This is crucial for achieving the dual objectives of maximizing grain yield while maintaining adequat…
View article: Winter cover crops’ response to different cotton harvest aids
Winter cover crops’ response to different cotton harvest aids Open
With declining of the Ogallala Aquifer in the Central High Plains, cotton ( Gossypium hirsutum L.) has emerged as a low‐water‐demanding alternative to corn ( Zea mays ). However, cotton harvest leaves minimal cover on the soil surface foll…
View article: The Effect of Nitrogen Fertilizer Placement and Timing on Winter Wheat Grain Yield and Protein Concentration
The Effect of Nitrogen Fertilizer Placement and Timing on Winter Wheat Grain Yield and Protein Concentration Open
Nitrogen (N) fertilizer management in winter wheat production faces challenges from volatilization losses and sub-optimal application strategies. This is particularly problematic in the Southern Great Plains, where environmental conditions…
View article: Evaluation of static and sensor‐based nitrogen recommendation models for winter wheat
Evaluation of static and sensor‐based nitrogen recommendation models for winter wheat Open
Nitrogen (N) management is crucial to increase winter wheat production. Improved prediction of the economic optimal N rates (EONR) for winter wheat could increase N use efficiency and farmers' profits. However, characterization of the vari…
View article: Sensor-Based Bermudagrass Yield Prediction Models Using Random Forest Algorithm in Oklahoma
Sensor-Based Bermudagrass Yield Prediction Models Using Random Forest Algorithm in Oklahoma Open
The current available direct and indirect forage biomass estimation methods are prohibitive for producers because they are labor-intensive and time-consuming. Current literature states that (i) machine learning algorithms are promising in …
View article: Recovery of Beef Cattle Manure Nitrogen in a Long-Term Winter Wheat Fertility Study
Recovery of Beef Cattle Manure Nitrogen in a Long-Term Winter Wheat Fertility Study Open
Beef-cattle manure (BCM) can be an effective source of nitrogen (N) for crop production. However, N availability from manure can be difficult to quantify across varying environments. The Magruder Plots are a continuous winter wheat (Tritic…
View article: Optimizing Spray Technology and Nitrogen Sources for Wheat Grain Protein Enhancement
Optimizing Spray Technology and Nitrogen Sources for Wheat Grain Protein Enhancement Open
Increasing wheat (Triticum aestivum L.) grain protein concentration (GPC) without excessive nitrogen (N) inputs requires understanding the interactions between N source characteristics and application technology parameters. This study eval…
View article: Soil pH influence on cotton lint yield and quality
Soil pH influence on cotton lint yield and quality Open
Increases in cotton ( Gossypium hirsutum L.) production across Oklahoma due to various circumstances have led to cotton planted on soils that have been traditionally managed for differing crops, specifically winter wheat. Many of these soi…
View article: When should wheat phosphorus recommendations be based on build‐maintenance rather than sufficiency? An economic analysis
When should wheat phosphorus recommendations be based on build‐maintenance rather than sufficiency? An economic analysis Open
This article presents an economic analysis of two phosphorus (P) fertilizer recommendation approaches, sufficiency and build‐maintenance, in the context of Kansas and Oklahoma wheat ( Triticum aestivum L.). Sufficiency seeks to meet crop n…
View article: Field trial guidelines for evaluating enhanced efficiency fertilizers
Field trial guidelines for evaluating enhanced efficiency fertilizers Open
There are many fertilizer additives and alternatives that aim to increase plant nutrient use efficiency and reduce nutrient losses to the environment, here referred to collectively as enhanced efficiency fertilizers (EEFs). However, there …
View article: Micronutrients concentration and content in corn as affected by nitrogen, phosphorus, and potassium fertilization
Micronutrients concentration and content in corn as affected by nitrogen, phosphorus, and potassium fertilization Open
The interaction between nitrogen (N), phosphorus (P), and potassium (K) fertilizers significantly impacts the uptake of micronutrients in corn, influencing their availability in soil and uptake by plants. Understanding the interaction of m…
View article: Impacts of soil pH and extractable aluminum on winter canola production in the southern Great Plains
Impacts of soil pH and extractable aluminum on winter canola production in the southern Great Plains Open
Winter canola (Brassica napus L.) is a potential alternative to winter wheat in Oklahoma rotation systems as a means to overcome the negative impacts of continuous wheat systems. However, its performance may suffer in the acid soils that a…
View article: Replacing Fertilizer with Dried Distillers’ Grains in Stocker Cattle Systems on Southern Great Plains Old World Bluestem, USA
Replacing Fertilizer with Dried Distillers’ Grains in Stocker Cattle Systems on Southern Great Plains Old World Bluestem, USA Open
The objective was to examine the effects of dried distillers’ grains supplementation and fertilization strategies on the cattle performance and resource use efficiency of stocker cattle grazing on Plains Old World bluestem. Over 4 consecut…
View article: Nitrogen, Phosphorus, and Potassium Uptake in Rain-Fed Corn as Affected by NPK Fertilization
Nitrogen, Phosphorus, and Potassium Uptake in Rain-Fed Corn as Affected by NPK Fertilization Open
Effective nutrient management requires understanding nutrient uptake at various growth stages and nutrient removal by the harvested portion. Information on nutrient accumulation was provided by some older literature, and a few researchers …
View article: Evaluation of Nitrogen and Cropping System Management in Continuous Winter Wheat Forage Production Systems
Evaluation of Nitrogen and Cropping System Management in Continuous Winter Wheat Forage Production Systems Open
In the central Great Plains, winter wheat is used for over-winter grazing for cattle and sheep until the late spring months, when livestock are moved to grass pasture. As the popularity of summer cover crops increases, interest in their us…
View article: Impact of long-term fertilization in no-till on the stratification of soil acidity and related parameters
Impact of long-term fertilization in no-till on the stratification of soil acidity and related parameters Open
The increasing cost of fuel and machinery used in conventional tillage systems makes no-till management (NT) an enticing alternative for small-grain producers. However, the application of fertilizers to the soil surface under NT has been s…
View article: Evaluation of Mehlich-3 as a Multi-Element Extractant of Micronutrients and Sulfur in a Soil–Ryegrass System Amended with Varying Biochar Rates from Two Feedstocks
Evaluation of Mehlich-3 as a Multi-Element Extractant of Micronutrients and Sulfur in a Soil–Ryegrass System Amended with Varying Biochar Rates from Two Feedstocks Open
Mehlich-3 (M-3) is used as a universal nutrient extractant due to its ability to simultaneously extract multiple elements. This study aimed to assess M-3 for the simultaneous determination of plant-available zinc (Zn), copper (Cu), iron (F…
View article: Producers’ adoption behaviors for precision agriculture (PA) technologies to improve nitrogen use efficiency: Diffusion of Innovations theory as an explanatory lens
Producers’ adoption behaviors for precision agriculture (PA) technologies to improve nitrogen use efficiency: Diffusion of Innovations theory as an explanatory lens Open
Advancements in precision agriculture technologies enable producers to achieve higher yields; however, in some cases, these innovations have not reached widespread adoption despite years of availability. We sought to understand producers’ …
View article: Impact of in-furrow fertilizers on winter wheat grain yield and mineral concentration
Impact of in-furrow fertilizers on winter wheat grain yield and mineral concentration Open
Placement of fertilizer in the seed furrow to increase nutrient availability is a common practice in row-crop production. While in-furrow application of fertilizer is widely utilized in the production of winter wheat ( Triticum aestivum L.…
View article: Recovery of Grain Yield and Protein with Fertilizer Application Post Nitrogen Stress in Winter Wheat (Triticum aestivum L.)
Recovery of Grain Yield and Protein with Fertilizer Application Post Nitrogen Stress in Winter Wheat (Triticum aestivum L.) Open
Unfavorable weather conditions and lack of appropriate farm machinery often delay N application. This results in nitrogen (N) deficiency during the vegetative and early reproductive growth stages of winter wheat. The objective of this stud…
View article: Biochar Applied with Inorganic Nitrogen Improves Soil Carbon, Nitrate and Ammonium Content of a Sandy Loam Temperate Soil
Biochar Applied with Inorganic Nitrogen Improves Soil Carbon, Nitrate and Ammonium Content of a Sandy Loam Temperate Soil Open
Biochar is suggested to improve soil properties. However, its combination with inorganic nitrogen (N) fertilizer in temperate soils is not well understood. This study compared the effect of fertilizer N-biochar-combinations (NBC) and ferti…
View article: Soil sampling depth impact on phosphorus yield response prediction in winter wheat
Soil sampling depth impact on phosphorus yield response prediction in winter wheat Open
Nutrient stratification of no‐till managed soil can affect soil test analysis levels of plant‐available phosphorus (P). Research has suggested sampling to different depths due to soil acidity, but little work has been conducted to investig…
View article: On farm evaluation of preplant soil test P and K in double‐crop soybeans
On farm evaluation of preplant soil test P and K in double‐crop soybeans Open
Many producers in the southern Great Plains choose to plant summer crops immediately following the harvest of winter crops to increase farm revenue. The practice, referred to as double cropping, is often done with limited inputs to reduce …
View article: Evaluation of temporal variability on tissue nutrient concentrations of canola
Evaluation of temporal variability on tissue nutrient concentrations of canola Open
The use of plant tissue analysis as a tool for diagnosing nutrient deficiency has steadily gained interest by producers and crop advisors in Oklahoma. A study was conducted during the 2012–2013 and 2015–2016 growing seasons at two location…
View article: Predicting Winter Wheat Grain Yield Using Fractional Green Canopy Cover (FGCC)
Predicting Winter Wheat Grain Yield Using Fractional Green Canopy Cover (FGCC) Open
Optical sensors have grown in popularity for estimating plant health, and they form the basis of midseason yield estimations and nitrogen (N) fertilizer recommendations, such as the Oklahoma State University (OSU) nitrogen fertilization op…
View article: Evaluation of incorporated phosphorus fertilizer recommendations on no‐till managed winter wheat
Evaluation of incorporated phosphorus fertilizer recommendations on no‐till managed winter wheat Open
The current Oklahoma State University Soil, Water, and Forage Analytical Laboratory (OSU) phosphorus (P) recommendations were developed for conventional tillage systems with P fertilizer incorporated in the soil. The rate recommendations w…
View article: Assessing forage bermudagrass cultivar tolerance to glyphosate application
Assessing forage bermudagrass cultivar tolerance to glyphosate application Open
In‐season weed control with glyphosate could be a feasible option if bermudagrass [ Cynodon dactylon (L.) Pers.] tolerance to glyphosate was better understood. The objective of this study was to evaluate the tolerance of bermudagrass culti…
View article: Banding of phosphorus as an alternative to lime for wheat in acid soil
Banding of phosphorus as an alternative to lime for wheat in acid soil Open
Soil acidification limits wheat ( Triticum aestivum L.) yields and continues to intensify due to N application and crop harvesting. Applying agricultural limestone (aglime) is the most common remedy for soil acidity but requires a substant…