There are more surprising photos from Doug Soldat this week. Where potassium fertilizer was applied, there is more snow mold. Where potassium was not applied, there is less snow mold.

This photo, starting in the top right plot with the lowest amount of snow mold, and going clockwise, is:

• top right, no K for six years
• bottom right, no K for six years but high K added from August to October 2016
• bottom left, high K for six years
• top left, high K for six years but no K after August 2016.

Tried something new this year. Top left high K for six yrs, but no K after Aug 2016. Bottom left high K six years. pic.twitter.com/AUbalXllLL

— Doug Soldat (@djsoldat) February 20, 2017

It's not so surprising, actually.

More snow mold than ever this year. Left: no K for six years. Right: 0.2 lbs K every other week. A4 bent pic.twitter.com/iZX2YLyxgw

— Doug Soldat (@djsoldat) February 20, 2017

Doug has been observing these results for some years now. See, for example:

• Spots of excitement in a boring experiment
• Every spring when the snow melts ...