In addition, rates will differ based on how often you want pros to clean. Generally, the more times a house cleaner comes in a month, the lower the price per visit, though this is often a matter of $5 or $10 per clean. Some cleaners offer a discount if homeowners are willing to pay for multiple visits upfront, or if they sign a long-term contract.
In 1903, the newly-independent Panama sold the rights to the canal to the U.S. for $10 million. The U.S. military had a strong presence in the Panama Canal Zone until 1999, when all U.S. military bases were closed. The canal is still used for the transportation of military water vessels.
Irrigation is the artificial application of water to the land or soil. It is used to assist in the growing of agricultural crops, maintenance of landscapes, and revegetation of disturbed soils in dry areas and during periods of inadequate rainfall.rrigation systems are also used for dust suppression, disposal of sewage, and in mining. Irrigation is often studied together with drainage, which is the natural or artificial removal of surface and sub-surface water from a given area.