As most of our ground is rough and rocky we are limited to raking one windrow at a time to make sure it is on ground that won't destroy the baler pickup. We put two to three rows together depending on the crop. The best rakes we have used as far as speed, clean fields, and being able to move heavy, wet windrows are the Fella rotary rakes. They do make them up to 40 ft wide if you can use that size but the are pricey.