Monday, July 27, 2009

We've witnessed a stronger than usual relationship between plant height and seeding rate this year at the Pioneer demonstration farm near Chatham,Ontario.The shorter soybeans in all photos above were planted at 100,000 seed drop in 20 inch rows while the taller soybeans were planted at 260,000 seed drop. We have conducted plant population studies from 100,000 to 275,000 seed drop for years now and yet we have never quite experienced the differential in plant height that we are seeing this year.Of course the real proof of whether higher plant populations would have paid this year will come through at harvest.Our previous work would say that no more than 175,000 seed drop is needed to optimize yields on these Beverly Silt Loam soils at Chatham.

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