Document Type

Thesis - Open Access

Award Date


Degree Name

Master of Science (MS)

Department / School



Experiments with oats have shown approximately equal yields from a wide range of seeding rates. Also, oats usually respond to an adequate supply of plant food elements. Yield is a product. As Grafius (12) pointed out, the yield of oats may be represented geometrically as the volume of a rectangular parallelepiped with edges X1= number of panicles per unit area, X2= average number of seeds per panicle, and X3= average weight per seed. Multiplied together X1X2X3 equals Y, yield. All changes in the yield components need not be expressed as changes in yield, but all changes in yield must be accompanied by changes in one or more of the components. Therefore, if a single variety seeded at several different rate exhibits approximately equal yields, the yield constancy may be due to changes in one or more of the components. The objectives of this study were to: 1. Investigate the effects of seeding rate and fertility level on yield and yield components. 2. Determine the relative importance of the yield components in influencing yield. 3. Determine the response of certain other agronomic characteristics, namely, heading date, lodging, maturity date, plant height, seedlings per unit area, test weight, and panicles per plant, to seeding rate and fertility level. 4. Evaluate the relationships among yield, yield components and other agronomic characteristics.

Library of Congress Subject Headings





South Dakota State University