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An attempt to increase yield by controlling leaf‐area index
Author(s) -
WATSON D.J.,
FRENCH S.A.W.
Publication year - 1962
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1962.tb05981.x
Subject(s) - thinning , dry matter , yield (engineering) , biology , leaf area index , index (typography) , agronomy , horticulture , botany , ecology , physics , world wide web , computer science , thermodynamics
SUMMARY Previous work showed that the leaf‐area index ( L ) of kale crops in their later stages of growth can be much above the optimum for dry‐matter production, which was between 3 and 3.5. When L was held close to 3.5 during July‐September 1955, by repeated thinning of plants, the total yield of dry matter including thinnings was increased by about 6%. When thinning was more severe yield was not increased. In a similar period in 1956, thinning that held L between 3.5 and 4 or between 3 and 3.5 did not increase total yield of dry matter, because in this year optimal L was much higher than before. The explanation of the seasonal variation in optimal L is not known.