Objective plant growth indicators between dent and black lay

T. Tollenaar ttollena at plant.uoguelph.ca
Thu Sep 9 21:42:16 EST 1999


> Are there any easily obtained reliable plant growth stages between
> beginning dent and black layer for corn?  I'm aware of R5 and R6.
>


Indeed, 0 to 100% "milk line" score.


> Additionally, what are some reasonable expected ranges of kernel
> wt/day increases during the linear phase of grain fill. In other words,
> what value might be considered high.


Rates are between 0 and 12 mg/kernel/day (see for instance Tollenaar
and Bruulsema, 1988, Can. J. Plant Sci. 68: 935-940.


Thijs Tollenaar,
Professor and Head, Crop Science Div.
Dept. of Plant Agriculture
University of Guelph
Guelph, ON, Canada, N1G 2W1
tel. <91> (519) 824-4120, ext. 3851
fax  <91> (519) 763-8933
Home page:
      http://www.plant.uoguelph.ca/faculty/ttollena/



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