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Maybe it's because I turned 40? Anyway, here is an interesting display of coffee chemistry applied to soil ammendment. Basically, all soil in Cerrado has great structure but lacks organic material, Nitrogen and Calcium (among other things). It is iron rich, but out of balance. Soil is tested and custom formulations are created for each Fazenda, sometimes for each separate plot on the Fazenda. There's science to the coffee of Cerrado, but you won't see indiscriminate use of chemcals and pesticides, you won't see ariel spraying of crops. 100% organic in cerrado would, I believe, be impossible given the soil condition. But every farm is very discrete about using soil amendment and EVERY farm I have seens uses extensive composting techniques, and encourage non-competing ground cover between the coffee plants.