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GRASS GROWTH IN MID‐SUMMER: A RE‐INTERPRETATION OF PUBLISHED DATA *
Author(s) -
Brougham R W.,
Glenda A. C.
Publication year - 1967
Publication title -
grass and forage science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.716
H-Index - 56
eISSN - 1365-2494
pISSN - 0142-5242
DOI - 10.1111/j.1365-2494.1967.tb00510.x
Subject(s) - interception , perennial plant , leaf area index , growth rate , sigmoid function , mathematics , agronomy , biology , environmental science , ecology , geometry , computer science , machine learning , artificial neural network
In a recent paper by Anslow it was concluded that there was no significant relationship between Leaf‐area Index, light interception and growth rate in a perennial ryegrass sward. The author further concluded that higher growth rates would not be obtained by attention to this relationship. The data presented by Anslow are re‐examined in this paper and the results of the analysis showed that: (a) recovery growth of the swards followed a sigmoid pattern of growth, (b) at low values of LAI growth rate was low and maximum growth rate was attained when most of the visible light was intercepted by leaves, and (c) the relationship between yield and LAI was linear, indicating that leaf‐area increase after defoliation also followed a sigmoid pattern. These results are discussed in relation to Anslow's interpretation.