NZSM Online

Get TurboNote+ desktop sticky notes

Interclue makes your browsing smarter, faster, more informative

SciTech Daily Review

Webcentre Ltd: Web solutions, Smart software, Quality graphics

Quick Dips

Wheat Protein Boosted

A late application of nitrogen increases wheat protein levels and grain size, according to a Massey University crop agronomist, by keeping the crop greener and photosynthesising longer after flowering. While nitrogen is commonly applied at sowing, a second application just prior to the boot stage produces increased yields.

Tests on three trial sites showed protein content rising from 10.7% to 12.0%, a useful increase, as payments are based on protein content. The extra $250 per hectare netted by the "added value" would make it economically viable to buy and apply the nitrogen.

The procedure appeared to be effective in areas of heavy soil, like the Manawatu, although researchers in the South Island have found similar results. Soil fertility was an important factor.

"If existing fertility is very high, for example a paddock coming out of pasture, nitrogen is unlikely to give a yield increase, and the protein content may lift beyond where you're picking up premiums," warns agronomist James Millner.

Georgina Hall, Massey University