Black Holes: Facts, Theory & Definition. Black holes are some of the strangest and most fascinating objects found in outer space. They are objects of extreme density, with such strong gravitational attraction that even light cannot escape from their grasp if it comes near enough.
Chemigation is the injection any chemical such as nitrogen, phosphorus or a pesticide into irrigation water and applied to the land using the irrigation system. The proper use of chemigation is recognized as a Best Management Practice (BMP) for irrigated agriculture.
Fumigation is not a do-it-yourself project. During the termite fumigation procedure, the professional will cover your home with a tent that is made of vinyl-coated tarps. Fumigation tents are used to minimize leakage of the fumigant, confining it to the infested structure. Sulfuryl fluoride is the fumigant used to treat residential buildings.