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.
Peas are ready to harvest in approximately 60-70 days. When pods of the peas appear to be swelling with rounded pea forms visible, they are ready for picking. Take a test picking every day or so, and note the appearance of the pods with the sweetest peas. If the pods are left on the vines too long, they become tough and starchy. Pick black eyed peas slightly before maturity. They should still be a light green with a purplish eye. They are still easy to shell at this stage and taste delicious.