Chemical Weathering. Chemical weathering takes place in almost all types of rocks. Smaller rocks are more susceptible, however, because they have a greater amount of surface area. Chemical reactions break down the bonds holding the rocks together, causing them to fall apart, forming smaller and smaller pieces.
Autos generally are ready to harvest sooner than photoperiod. Most autos are ready to harvest 65-90 days after being sprouted from seed. Some super autos have been bred to grow very big and can take up to 100 days before harvest.
Harvest time for Sub Arctic Plenty, a determinate variety, is roughly 45 days from the transplanting date, and each tomato weighs about 4 ounces. Early Girl and Early Cascade are ready to pick in about 55 days.