Class Publications Nitrogen Use Efficiency, Nitrogen Fertilizers, NUE, Nitrogen and the Environment
 Journal Articles on-line
YEAR Journal Article Title
2017 World Phosphorus use Efficiency in Cereal Crops Agronomy Journal, 2017, 109:1-8(2017)
2016 Source Estimates of Global Warming and Associated Errors

Global Warming, Review and Interpretation of Contrasting Estimates (in process)
2015 Relationship between Mean Square Errors and Wheat Grain Yields in Two Long-term Nutrient Management Experiments. J. Plant Nutr. doi:10.1080/01904167.2016.1257638.

 Hand Planter for maize (Zea mays L.) in the developing world. J. Plant Nutrition. 39:1233-1239.

2013 Nitrogen Fertilizer Management for Improved Grain Quality and Yield in Winter Wheat in Oklahoma (ID: 754039 DOI:10.1080/01904167.2012.754039). J. Plant Nutr. 36:749-761.
2009 Cereal nitrogen use efficiency in Sub Saharan Africa. J. Plant Nutr. 32:2107-2122
2007 Weather, Fertilizer, Previous Year Yield, and Fertilizer Levels Affect Ensuing Year Fertilizer Response of Wheat  Agron. J. 2007 99: 1607-1614. (pdf)
2007 The Magruder Plots, Untangling the Puzzle.  (Agron J. 1191-1198)
2003 Nitrogen Balance in the Magruder Plots Following 109 Years in Continuous Winter Wheat  J. Plant Nutr.  26:1561-1580. (pdf)
2001 Estimated land area increase of agricultural ecosystems to sequester excess atmospheric carbon dioxide. Commun. Soil Sci. Plant Anal. 32:1803-1812. (pdf)
1999 Estimated Increase in Atmospheric Carbon Dioxide Due to worldwide decrease in Soil Organic Matter
  Atmospheric CO2