They dont state spoil in the game, but they are recorded in the log files as spoiled cuz they werent picked when the new crop came up.

So if you have 120 left to harvest when the new crop of 800 comes up - you wont have 920 -- you will have 800 like you would if they were all harvested - so the 120 that werent gathered are "spoiled" or lost. The log file for the game will say something like "120 crops spoiled", but your actual game screen will not say anything at all.