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Alfalfa Yield Components in Solid Seedings 1
Author(s) -
Miller D. A.,
Shrivastava J. P.,
Jackobs J. A.
Publication year - 1969
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1969.0011183x000900040016x
Subject(s) - yield (engineering) , crown (dentistry) , dry matter , biology , k nearest neighbors algorithm , dry weight , horticulture , agronomy , mathematics , botany , physics , medicine , dentistry , artificial intelligence , computer science , thermodynamics
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 (X 1 ), dry weight of the previous harvest (X 2 ), distance of the nearest neighbor (X 3 ), potential area of the plant (X 4 ), and number of steins of the nearest neighbor (X 5 ), one could predict more reliably the total dry matter yield of a plant (Y 1 ), and its number of stems (Y 2 ) than the weight per stem (Y 3 ). ( 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.