A nut dropped on the ground will roll until it finds a crack to fall into. The tool you need is back at the shop. The more work you have to get done, the more likely it is to rain. It never hails on bare ground. Following a summer-long drought, the rainfall received during harvest will be equivalent to twice the accumulated moisture deficit for the entire growing season.
Weeds are the only plants that thrive in miserable weather.
The twitchgrass is always greener on your side of the fence. Problem weeds appear first at the back end of the field you visit least. The number of salesmen that will call on you on any given day will be directly proportional to the amount and urgency of the work you have to get done. Weed escapes increase exponentially once the corn is too big to cultivate. Spray drift is selectively attracted to soybean fields.