R
R. W. Mullen
Researcher at Oklahoma State University–Stillwater
Publications - 20
Citations - 2295
R. W. Mullen is an academic researcher from Oklahoma State University–Stillwater. The author has contributed to research in topics: Soil water & Carbon dioxide in Earth's atmosphere. The author has an hindex of 15, co-authored 20 publications receiving 2097 citations.
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Journal ArticleDOI
Improving Nitrogen Use Efficiency in Cereal Grain Production with Optical Sensing and Variable Rate Application
William R. Raun,John B. Solie,Gordon V. Johnson,Marvin L. Stone,R. W. Mullen,K. W. Freeman,Wade Everett Thomason,E. V. Lukina +7 more
TL;DR: In this article, the validity of using in-season estimates of grain yield (INSEY) and a response index (RI) to modulate N at 1-m 2 spatial resolution was evaluated.
Journal ArticleDOI
Optical Sensor‐Based Algorithm for Crop Nitrogen Fertilization
William R. Raun,John B. Solie,Marvin L. Stone,K. L. Martin,K. W. Freeman,R. W. Mullen,Hailin Zhang,James S. Schepers,Gordon V. Johnson +8 more
TL;DR: The WheatN.1.0 algorithm as discussed by the authors combines some of the current concepts for N management in cereal production into an applied algorithm. But it does not follow any kind of generalized methodology that guarantees maximum nitrogen use efficiency (NUE).
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Corn response to nitrogen is influenced by soil texture and weather
Nicolas Tremblay,Yacine Bouroubi,Carl Bélec,R. W. Mullen,Newell R. Kitchen,Wade Everett Thomason,Steve Ebelhar,David B. Mengel,William R. Raun,Dennis D. Francis,Earl D. Vories,Ivan Ortiz-Monasterio +11 more
TL;DR: In this article, the influence of soil and weather parameters on N responses of corn across 51 studies involving the same N rate treatments which were carried out in a diversity of North American locations between 2006 and 2009.
Journal ArticleDOI
Nitrogen fertilization optimization algorithm based on in-season estimates of yield and plant nitrogen uptake
E. V. Lukina,K. W. Freeman,K. J. Wynn,Wade Everett Thomason,R. W. Mullen,Marvin L. Stone,John B. Solie,A. R. Klatt,Gordon V. Johnson,Ronald L. Elliott,William R. Raun +10 more
TL;DR: In this article, an alternative method of determining fertilizer N rates using estimates of early-season plant N uptake and potential yield determined from in-season spectral measurements collected between January and April.
Journal ArticleDOI
Influence of Late-Season Foliar Nitrogen Applications on Yield and Grain Nitrogen in Winter Wheat
Curt W. Woolfolk,William R. Raun,Gordon V. Johnson,Wade Everett Thomason,R. W. Mullen,Kathie J. Wynn,K. W. Freeman +6 more
TL;DR: In this article, the effects of late-season foliar N applications on grain yield, total grain N, straw yield, and total straw N were evaluated at two locations in Oklahoma in 1997-1998, 1998-1999, and 1999-2000.