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Published in Crop Sci 9:440-443 (1969)
© 1969 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Alfalfa Yield Components in Solid Seedings1

D. A. Miller, J. P. Shrivastava and J. A. Jackobs2

Prediction of yield and two components of yield of alfalfa, (Medicago saliva L.), in solid-seeded stands at Urbana, Ill. revealed the following: (1) On the basis of five independent variables studied, spring crown area of the plant (X1), dry weight of the previous harvest (X2), distance of the nearest neighbor (X3), potential area of the plant (X4), and number of steins of the nearest neighbor (X5), one could predict more reliably the total dry matter yield of a plant (Y1), and its number of stems (Y2) than the weight per stem (Y3). (2) The effect of the independent variables was not of the same magnitude for different harvests of a variety nor for different varieties. (3) Crown area and yield of the previous harvest were the most important variables influencing the yield and two components of yield. (4) Potential area of the plant was not an important predictor of yield in individual harvests, but was significant when considered on a seasonal basis. (5) The number of stems of the nearest neighbor was a better predictor of plant yield and its components than distance of this neighbor.

Key Words: Inter-plant competition • Yield predictions • Selection

1 Contribution from Department of Agronomy, University of Illinois, Urbana, Ill. 61801.

2 Assoc. Prof, of Plant Genetics, Research Assistant (now Assoc. Prof, of Agrostology, J. N. Krishi Vishwa Vidyalaya, Jabalpur, India), and Professor of Forage Production, University of Illinois.

Received for publication November 6, 1968.




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