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 price of stamps in 2016 is set to decrease for the first time in nearly a century. According to CNN Money, the United States Postal Service has announced that they will lower the cost of stamps from $0.49 to $0.47 on Sunday, April 10.