For the most part the Southern Ontario soybean crop is at the R5 - R6 stage of crop development.The R5 stage of growth is reached when seed in the plants top pods reaches 1/3 of a cm.in length.The R6 stage of development is reached when seeds fill the cavity within the plants top pods.The plant in the photo above and below could be considered to be the R6 stage of crop development.
Seed is filling the cavity of the pod in the above shot.This is considered the R6 stage of crop development.
In the above photo seed has not yet filled the cavity of the pods but is more than .3 cm in length.This could be considered a plant mid way between the R5 and R6 stage of reproductive growth.
These plants still have small pods at the top no more than 3/4 of an inch in length.These could be considered to be in the R4-R5 stage of crop development.
This plant too is in the R4-R5 stage of crop growth.Yields can be significantly impacted by stresses in this period.August is the crucial month for soybean pod fill and for the most part we have had very favourable weather during the pod fill period.Though we started with slow growth from May through to late June we have not experienced any severe drought stress to really hurt soybean pod fill.If anything the 2 biggest diseases we have experienced is white mould and SDS ( Sudden Death Syndrome )Soybean Yields for most growers should be respectable.
Sunday, August 30, 2009
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