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.
For the medical mnemonic, see DOTS (mnemonic). DOTS (directly observed treatment, short-course), also known as TB-DOTS, is the name given to the tuberculosis control strategy recommended by the World Health Organization. According to WHO, The most cost-effective way to stop the spread of TB in communities with a high incidence is by curing it.