It's an agricultural term that sneaked into the economy. It comes from soy or soy, and is to favor its cultivation to the detriment of other vegetables that may be less profitable. This usually ends in a monoculture that in the medium or long term is detrimental to a region, but in the short term it brings an economic benefit from high demand. Hence we talk about "soxing the economy" when countries become almost exclusive exporters of soybeans to sustain their income.
