A Turf GvX calculator

Twenty years ago, it made sense to me to apply the same rate of fertilizer at each application. I usually did so on a schedule that started at what I considered the beginning of the growing season, and I continued that fertilizer rate through to the end of the season, with a few minor adjustments.

Such an approach seems ridiculous to me today, because it's obvious that the growing conditions change from the start through to the end of the…