Function. Plants also have a pH rating. Plants whose pH matches the soil's pH can take up nutrients more efficiently than plants with a pH rating different than the soil. Pine trees and the needles that they produce prefer acidic soil.
Price of a Stamp. The current price of a first class stamp is 49 cents. A domestic first class letter (1 oz.) is 49 cents. The price of each additional ounce is 21 cents. It will cost you 34 cents to send a domestic postcard.
The cost of a forever stamp is the current cost of a first class stamp. In January of 2013 that is 46 cents. It is valid for the first ounce of mail regardless of the actual price.he cost of a forever stamp is the current cost of a first class stamp. In January of 2013 that is 46 cents. It is valid for the first ounce of mail regardless of the actual price.