Heat Accumulation for April 2010 Planting Season

This year has seen some of the earliest planting that most people in the agricultural community can remember.  The accumulated heat has set records for most of the province.  Below is data accumulated by Syngenta Seeds and WINS through sites sponsored by the company throughout Ontario. 

It is generally accepted that hybrids require about 180 to 200 heat units accumulation from planting to emergence.

These graphs show most of the province was very close to these numbers for the month of April and accumulations were considerably ahead of normal.  The lack of moisture accumulation through the months of March and April has been a concern with many soils being drier than normal for this time of year.  Some moisture has fallen the first week of May but we are still behind normal, and stands may show uneven emergence as a result.


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