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Document Type

Thesis - University Access Only

Award Date

1989

Degree Name

Master of Science (MS)

Department

Agronomy

First Advisor

Dale L. Reeves

Abstract

The genotype and its environment determine the variation in crop production. Significant crop-weather relationships can be obtained providing the meteorological factors involved are environmental factors on which crops are directly dependent. In the past, efforts to predict crop yield by utilizing weather factors were mainly devoted to wheat and rarely on other crops such as oats. Research on wheat revealed that no single weather variable explained much of the variation in yield, which is actually the cumulative effect of many variables operating at different stages of growth. Baier et al. pointed out that the effect of different weather variables operating at various stages of crop growth, is dependent upon the location where the crop was planted. Therefore, it is necessary to include as large a climatic area as the crop habitat in order to get meaningful and universally applicable weather-yield relationships. Feyerherm et al. developed a weather-yield function (WYF) to estimate the impact of weather on winter wheat yield to identify yield-limiting factors and to manage wheat for increased productivity. This WYF can be applied at a single location or averaged over locations to apply to a region. This study was initiated with the following objectives: (1) to develop models which predict oat yield, 1000-kernel weight, test weight, and the number of days from planting to heading, from environmental factors found in each location within the whole oat-belt (United States and Canada). (2) to examine the relationships between oat yield and 1000-kernel weight, test weight and the number of days from planting to heading. Kernel weight is a component of yield while test weight is usually considered a measure of grain quality. Days from planting to heading indicate earliness in maturity of the oat plants.

Library of Congress Subject Headings

Oats -- Climatic Factors

Oats -- Yield

Format

application/pdf

Number of Pages

83

Publisher

South Dakota State University

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