As investment in on-farm storage grows, new research shows why it is critical to maintain wheat seed in cool, dry conditions

Agriculture Victoria research scientist Dr Cassandra Walker was not surprised that her study into the impact of storage conditions found that wheat seed viability declined at higher temperatures.

But what did strike her was the significant role that moisture plays, and in particular the difference in viability between grain moisture levels of 11 and 14 per cent.

“We studied two moisture levels – the upper end of what is considered safe at 11 and 14 per cent – and clearly there’s a tipping point between them where grain viability is lost,” she says. “So moisture content has a big part to play, as well as temperature, in germination potential. You can preserve grain viability for longer with lower moisture levels.”