I have seen attachments like this with other companies. His dozer rake design for the skidsteer is nice. There are a ton of companies that make root plows for dozers/tractors.Siesta, don't know if you can get to his site, but he builds implements to clear Texas land! You might find interesting. https://www.facebook.com/HebbronvilleMachineShop
Land clearing practices differ from each property/use/soil/etc and if under USDA grants. My preferred way to clear property with good soil is to use a dozer and then followed up with a root plow then rake it