The last small clearing job I did on our own property I pushed the debri into a few seperate piles in the middle of the new field, Aussie style, instead of into a windrow. It really worked much better, shortened the push, and burned hard and hot in the pile. It was easy pushing up the residue for re-burn. I just spread out an remaining dirt afterwards. Rows might be prefurable for some depending on immediate use.
My father was our fire warden. He was a conservationist before it was liberal to be. Pollution was a crime! Winter brush piles won't burn without accelerant. My favorite is three large old tires laid flat. Stacked, they each will hold some fluid. Gasoline in the bottom, diesel in the next, old crankcase oil in the top, pile brush on these. Pile size is limited only by proximity to valuables. Once the pile grows to appropriate size, a light splash of gasoline, and a match, you are in business. Do it at night, neighbors won't see smoke.
Dad died, a few years later I needed a fire permit. I usually subscribe to the apology is better than being refused philosophy. #1 son is too legal for my taste, he made the call. "Sure" was the answer! I was surprised. I went to pick up the paperwork. The new Warden asked if I had enough tires! I didn't know how to reply!
In winter you end up with a big hole up through your pile. Push it in from the perimeter. Be sure of your tracks. A friend lost a track from a worn out undercarriage. His LGP Deere 350 was converted to conventional tracks. These were badly worn. At the center of the fire he must have done the wrong thing.
