West-central Great Plains Research Articles

Grain Protein Content as an Indicator of N Sufficiency for Winter Wheat1

AbstractA great majority of the dryland winter wheat (Triticum aestivum L.) producers in the west central Great Plains currently do not use soil tests to determine N fertilizer needs although most producers have grain protein data from their fields. Field experiments with N rate as the variable were conducted throughout eastern Colorado over a 4‐year period with winter wheat grown under summer fallow cropping. The objective was to determine if grain protein content could be used as a post‐harvest indicator of sufficiency of N for maximum grain yield. The soil types were of the Paleustoll, Argiustoll, Paleargid, and Haplargid great groups. The yield and protein response data from the experimental locations were analyzed by an interaction chisquare procedure.Grain protein content was found to be an effective post‐harvest indicator of N nutrition adequacy for grain production. Both a critical level and a transitional zone of grain protein content were defined using interaction chi‐square analysis. The most critical level was determined to be 11.5% protein and the transition zone between the deficient and N sufficient populations of yield observations was between 11.1 to 12.0%. The amount of yield lost to N deficiency was not related to grain protein content. Workers in other geographic areas should be able to take existing N response data and develop similar guidelines appropriate for those areas.

The Spacing of Corn in the West Central Great Plains1

The Spacing of Corn in the West Central Great Plains¹

A Study of the Vegetation of the Mesa Region East of Pike's Peak: The Bouteloua Formation. II. Development of the Formation

Previous articleNext article FreeA Study of the Vegetation of the Mesa Region East of Pike's Peak: The Bouteloua Formation. II. Development of the FormationH. L. ShantzH. L. Shantz Search for more articles by this author PDFPDF PLUS Add to favoritesDownload CitationTrack CitationsPermissionsReprints Share onFacebookTwitterLinkedInRedditEmail SectionsMoreDetailsFiguresReferencesCited by Volume 42, Number 3Sep., 1906 Article DOIhttps://doi.org/10.1086/328960 Views: 81Total views on this site Citations: 4Citations are reported from Crossref Journal History This article was published in the Botanical Gazette (1876-1991), which is continued by International Journal of Plant Sciences (1992-present). PDF download Crossref reports the following articles citing this article:Gillian L. Rapson Tertiary succession: a new concept to help vegetation restoration, Restoration Ecology 31, no.11 (Aug 2022).https://doi.org/10.1111/rec.13683Margot W. Kaye, Connie A. Woodhouse, Stephen T. Jackson Persistence and expansion of ponderosa pine woodlands in the west-central Great Plains during the past two centuries, Journal of Biogeography 37, no.99 (Aug 2010): 1668–1683.https://doi.org/10.1111/j.1365-2699.2010.02327.xP. V. Wells Scarp Woodlands, Transported Grassland Soils, and Concept of Grassland Climate in the Great Plains Region, Science 148, no.36673667 (Apr 1965): 246–249.https://doi.org/10.1126/science.148.3667.246Eric Ashby Statistical ecology, The Botanical Review 2, no.55 (May 1936): 221–235.https://doi.org/10.1007/BF02867930