History of Solar System formation and evolution hypotheses - Lunar origins hypotheses. 1  Over the centuries, many scientific hypotheses have been advanced concerning the origin of Earth's Moon.
Regular irrigation keeps grass green. Improper fertilizing, nutrient deficiencies, diseases and insects can all cause yellow grass. No matter the cause, yellow grass detracts from your home's appearance. Identifying and correcting the issue is essential to restoring your lawn's health and appearance any time of year.
Gray Leaf Spot. Gray leaf spot, caused by Pyricularia grisea, causes bleached spots with dark margins on grass blades. St. Augustinegrass, fescues, ryegrasses and kikuyograss are impacted by gray leaf spot, which prefers warm temperatures, high humidity, and over-watered and over-fertilized lawns.