HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Porter, M. A. Articles by Milliken, G. M. Search for Related Content PubMed Articles by Porter, M. A. Articles by Milliken, G. M. Agricola Articles by Porter, M. A. Articles by Milliken, G. M.

Prediction of Wheat Grain Protein Content from Climatic and Edaphic Variables¹

Grain protein in wheat (Triticum aestivum L.) has important funtional and nutritional roles and methods to predict its content would be valuable to both producers and users. We developed statistical models to predict grain protein content of hard red winter wheat from soil fertility conditions during anthesis and climatic conditions during grain filling. Soil and grain samples were collected from two irrigated field locations and nine dryland field locations containing 12 wheat cultivars during three growing seasons. A number of models were constructed using SAS procedures. In the best model, five edaphic parameters—P, K, and nitrate concentration from 15 to 46 cm in the profile and organic matter contents from 0 to 15 cm and 15 to 46 cm in the profile—significantly predicted the response surface. There were significant location, year, and location x year effects, but climatic variables did not significantly affect the prediction surface in the set of experiments. The model can be used to predict wheat grain protein content, to identify factors that influence protein content, and to aid in managing wheat for higher protein content.

Key Words: Triticum aestivum L. • N • P • K • General linear model • Statistical analysis system

² Graduate research assistant and professor, Dep. of Agronomy, and professors, Dep. of Statistics, respectively.

Received for publication January 22, 1982.