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 Maturity Bunching onions are typically ready for harvest 50 to 60 days after seeding, depending on environmental conditions, planting density, and cultivar.Shallots are generally ready for harvest 60 to 70 days after seeding.The most commonly used measure of harvest maturity are size of the plant and bulb diameter. The plant should have fully grown crisp green leaves with a minimum length of 30 cm (12 in). In some cultivars the leaf length may extend up to 60 cm (24 in).hallots are generally ready for harvest 60 to 70 days after seeding. The most commonly used measure of harvest maturity are size of the plant and bulb diameter. The plant should have fully grown crisp green leaves with a minimum length of 30 cm (12 in). In some cultivars the leaf length may extend up to 60 cm (24 in).