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.hat is the current price of a US Postal Service stamp for a first-class letter? The current (Aug 2014) price of postage for a standard first-class letter is 49 cents. Check out the website of the United States Postal Service for a full rundown, including additional-ounce costs (see Related Links).