The majority of milling wheat and feed wheat crop had been planted with only a third of barley crop sown.
The survey also indicates confidence is high for future sowing and predicts a 13 percent increase for the 2018 harvest.
"Feed barley is certainly on the rebound and is returning to normal areas with a 51 per cent increase likely compared to the 2017 harvest," says Mr Guy.
The dairy industry revival was also a factor with arable farmers returning to staple crops to meet demand.
"We encourage farmers who have planted milling wheat to get in contact with the flour millers to start a dialogue about the coming harvest," says Mr Guy.
While there was reasonable tonnage of feed barley still available at the time of the survey (July 1), those in the market should be taking steps to secure grain before that surplus runs out.
"If you want to secure quality domestically produced grain, which is traceable, get in contact with your arable farmer.
"Current trends are suggesting there may soon be no uncommitted grain left in farm silos, especially in Southland, North Otago and the North Island," says Mr Guy.