Had some timber work done this past February which included clear cutting some 22yr old pine. Would like to add a couple new 2 acre plots in these clear cuts & add fire lanes for some future burning as well. How long will it normally take these pine stumps to rot enough to blade em off with a dozier? Also need to terminate a small area of 17 yr old pine that was inaccessible. What is the herbicide of choice for girdling these pines? Thanks for all the info