slow-oxidation-grass Published April 28, 2012 at 640 × 480 in Brittle Grassland Pasture Update: Photo Essay Here is a picture from over the fence in an area without herbivores. You can see the slow-oxidation in the grey color of the older grass. Here is a picture from over the fence in an area without herbivores. You can see the slow-oxidation in the grey color of the older grass.