Saw these rolls of hay as I was driving into Kissimmee Prairie Preserve State Park and just knew what I wanted to do with them.

With the first version I converted it non-destructively to black & white using adjustment layers.

Then I decided that I wanted to practice colorizing.

So, I upped it to 16bits, duped background, changed the hue to blue (colorized) and added mask. Changed blend mode to color and then did that 3 more times, changing layer names as I went.
Blue, green, red, gold, merging all visible layers at this point.

For more details as to Primary Colorizing, see wonderful tutorial at: (this is the print version, which is easier to follow)

http://www.worth1000.com/tutorial.asp?sid=161015&print=1

I then used the High Pass method for sharpening:
Duplicate layer and desaturate.
Change layer mode to Soft Light.
Apply High Pass Filter (Filter > Other > High Pass), used low setting - 1.2

Flattened image, cropped a little and resized