I suspect it's highly variable. In some places or conditions, land use change is the primary factor. In others, it's AGW. In yet others, it's about equal.

al climate scientists think CC is the cause of desertification deforestation and poor farming and grazing methods are to blame as well and this also is caused by humans

Good question, we will have to weigh the difference between land use and climate change in the very near future. I will be following your answers for help in that department, thanks for the question

That question does not even make sense.