The USDA Agricultural Research Service (ARS) is working with NASA to help develop a system of estimating crop residue from satellite imagery. The current boots on the ground system is very labor intensive (details in the article) and so a satellite based system would be great time and cost saver. Every since the launch failure of the Orbiting Carbon Observatory, I have been following remote sensing schemes a little more closely, because we need data to make good decisions, whether about cropping schemes, or carbon valuation, or even as in the case of another NASA project, the amount of turf in the USA. Crop residue is important both to the health of the soil, and for the function is plays in carbon sequestration, which is one of the primarly ways in which agriculture can help arrest climate change...sustainable agriculture, that is, which is results in net carbon capture (via the buildup of organic matter in the soil) while no-till merely reduces the carbon footprint of conventional ag, I wish I could say that this study was done to provide the data to quantify these carbon balances and move us toward a carbon credit program to reward farmers (on a cash basis) for conservation tillage, but alas, the reason for the study is to "identify farm fields that can sustain more residue removal for ethanol production." It used to be that one of the signs of a bad farmer was that he sold off his manure and hay -- which meant his land was exporting fertility and would deteriorate over time. Nowadays, with synthetic fertilizers and CAFOs, that whole system is a thing of the past...or at least for a while longer until we are forced back to some sort of rudimentary husbandry at least, but the rising cost of energy. There was a time when we grew our energy, and that time will return.
