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Relationship Between Coefficient of Variation Measured by Spectral Reflectance and Plant Density at Early Growth Stages
(Oklahoma State University, 2004-12-01)
Nitrogen use efficiency (NUE) is estimated to be 33% throughout the world, current precision nitrogen application through precision sensing methods can improve NUE to a level of 50%. Statistical analysis of sensor data has ...
Effect of Nitrogen on Rhizobacteria Associated with Wheat Shoot Productivity
(Oklahoma State University, 2012-05-01)
The effect of nitrogen fertilizer on rhizobacteria associated with wheat (Triticum aestivum) shoot productivity was determined by using pyrosequencing technique. Easpur Loam soils was treated with 112-kg/ha N or left ...
Starter Fertilizer Management for Corn and Soybean in the Southern Plains
(Oklahoma State University, 2012-12-01)
Early plant growth and grain yield may be depressed in no-till cropping systems compared to conventional tillage because of the poor nutrient availability early in the growing season. Oklahoma no-till corn (Zea mays L.) ...
Determination of Nitrogen Availability From Animal Manure Amended Soils
(Oklahoma State University, 2007-07-01)
This study was conducted to evaluate the effects of long term manure application on soil properties, winter wheat, grain yield, and to determine the N availability of land applied manure. Three different manure sources and ...
Maize (Zea-maize L.) Grain Yield Respond to Nitrogen Applied at Different Distances Away from the Row
(Oklahoma State University, 2010-05-01)
A one percent global increase in nitrogen use efficiency would be worth approximately 1 billion dollars (Raun and Johnson, 1999). It is thus important to apply nitrogen (N) midseason or split applied so as to improve ...
Geologic Controls on Nitrogen Isotopes in Marine Black Shale: a Case Study of the Woodford Shale, Anadarko Basin, Oklahoma
(Oklahoma State University, 2013-12-01)
Determining depositional environments of organic-rich black shale can enhance the identification of hydrocarbon producing intervals. Several methods have been utilized to identify depositional environments; however, for ...
Controls on Bud Activation and Tiller Initiation in Tallgrass Prairie: the Effect of Light and Nitrogen
(Oklahoma State University, 2010-12-01)
Chapter 1: Perennial grass populations in tallgrass prairie ecosystems are maintained primarily through vegetative outgrowth from their belowground bud banks. Resources in these ecosystems that have been found to limit ...
Using informative Bayesian priors and on-farm experimentation to predict optimal site-specific nitrogen rates
(2023-05)
Precise site-specific nitrogen applications will reduce excess nitrogen fertilizer run-off and have corresponding environmental benefits. Adoption of site-specific nitrogen application technology has been slow, and many ...
Long-term Prescribed Fire Does Not Alter Litter Decomposition and Bioavailable Nitrogen in Xeric Oak Forests
(Oklahoma State University, 2013-12-01)
The Cross Timbers is a patchwork of grassland, savanna, and xeric oak forest that stretch across Kansas, Oklahoma, and Texas. Historically a pyric ecosystem, burning of the Cross Timbers became infrequent. Currently, land ...
Mid-season Recovery to Nitrogen Stress in Winter Wheat
(Oklahoma State University, 2004-12-01)
Winter wheat yields are directly affected by the amount of nitrogen (N) that is available to them for growth. Past research has indicated that spring application of N is more effective than fall application for winter ...