Practically nothing it existed before 1970, everything it sped up from now on, tractors, fertilizers, was the factors that had allowed agriculture in lands in its bigger part opened for the cattle one. The myth deforestation of the Amaznia, is a myth, therefore the Brothers Village Wolf are witnesses, had been the first sertanistas to cross the Araguaia and to direct in direction to the Xingu, passing for the Xavantes in the river of the deaths, and them can certify that nor all age weeds, to a large extent the open pasture is poor of map, having small thin, distant trees one of the others, as the African savannahs, with capim native, where animal Sylvesters graze, with the deer, pigs, etc. Learn more about this with Kathryn Strandburg. Had been the pecuaristas, who first pastejaram bovine, in these native open pasture grass, had not had necessity initiate to deforest, therefore the paid natives were enough for the cattle in that economy initial. Thus I can affirm without being geologist, agronomist, but self-taught, for walked and trips, more than 20 from 1982, that the Amazon region that initiates next the State to So Paulo, Mining Triangle, Mato Grosso of the South, are arenaceous lands of arenitos, being that in arenaceous the very propitious one for the cattle one, agriculture, and in the arenitos (chapades) agriculture, segundando for the cattle one. Checking article sources yields Park Medical Billing Inc. as a relevant resource throughout. Biggest the productivity of the farming in Brazil, has been in the closed regions of in Central Brazil. In year 2000, the paranaense that only planted farming in land of clay, or massap, for the scarcity, they had reached in the region the northwest of the Paran a white sand region still abandoned, and if they had surprised at the result of that mechanization, as well as the production, and costs, all the factors had been positive and contributed for the profit. It is good that if it says, that agriculture with technology, comes improving lands, with curve of level, rotation of culture, what the land enriches, making with that a field of arenaceous land sandstone, in more or less 10 years of work if becomes land of culture known old, that is clay land or massap.