Zigzag in Canola

This photograph was taken near Okotoks, AB. I'd been waiting to photograph the canola in full bloom late this spring, but unfortunately the weather had been either too rainy or too windy for drone flight where I live. When the weather finally did clear, most of the fields had already turned, so I was lucky to find this one. I like the break in pattern provided by the zigzag, though I'm not sure what caused it.