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Calculation of the Rate and Duration of Grain Filling in Corn ( Zea mays L.) 1
Author(s) -
Johnson D. R.,
Tanner J. W.
Publication year - 1972
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/cropsci1972.0011183x001200040028x
Subject(s) - zea mays , yield (engineering) , agronomy , biology , grain yield , dry matter , poaceae , zoology , materials science , metallurgy
Grain yield in corn ( Zea mays L.) is a function of the rate and duration of dry matter accumulation in the grain. We developed a technique for calculating these two components, based upon a regression analysis of yield over time. At least 90% of the grain accumulated linearly beginning 2½ weeks after silking. The duration of the actual grain‐filling period can be calculated from the final yield plus two or three sampling dates between 3 and 6 weeks after silking.