So here is the second study. I layered on top of the underpainted background, while still keeping it very very loose.
This captures my original intent more closely. I was taken by how the grasses' top edge was reading as a warm red-brown against a green backdrop, and the color transition from the mostly sienna field to that point. I also like how the layers of the pasture start as horizontal and then move to vertical.
As the autumn colors transition, I hope to do a few more studies of this, playing with the loose quality but trying to convey the textures somewhat.
Both of these, by the way, are in my Stillman and Birn Zeta sketchbook, 81/2 x 11". Mostly Daniel Smith watercolors.