Earlier initiation of spring growth and increased dry matter production of mixed prairie are important to the livestock industry, particularly in the northern Plains where the winter feeding period is often prolonged. The effect of N and P levels on growth rate and production of mixed prairie was studied over an 8-year period at the Northern Great Plains Research Center near Mandan, North Dakota. Annual application of N had no effect on growth rate prior to May 1; however, during the May 1-May 15 period, and during each successive growth period, rate of growth increased as N level increased up to 160 lb elemental N/acre (160-N). By May 15, plots receiving 40-N produced more dry matter than did plots without N by June 1. As the season progressed, the production lag of the nonfertilized plots became greater. The yield level reached on June 15 by plots receiving 40-N was not attained by the 0-N plots until July 15. Yield levels reached by fertilized plots on July 1 were never attained by nonfertilized plots. This material was digitized as part of a cooperative project between the Society for Range Management and the University of Arizona Libraries. The Journal of Range Management archives are made available by the Society for Range Management and the University of Arizona Libraries. Contact lbry-journals@email.arizona.edu for further information. Migrated from OJS platform August 2020
Scholarly peer-reviewed articles published by the Society for Range Management. Access articles on a rolling-window basis from vol. 1, 1948 up to 5 years from the current year. Formerly Journal of Range Management (JRM). More recent content is available by subscription from SRM.