George Strait has the most #1 hits at 57 and counting. Nobody else comes close. Conway Twitty actually had the most until 2006 with 55 #1 hits. The Beatles are the musical act with the most songs to reach No. 1 on the Billboard singles chart. Mariah Carey has 18 such #1 hits and Elvis Presley 17.
Primary succession begins on rock formations, such as volcanoes or mountains, or in a place with no organisms or soil. This creates conditions nearer optimum for vascular plant growth; pedogenesis or the formation of soil is the most important process.
Primary Succession vs. Secondary Succession Primary Succession is a type of ecological succession that happens to the area that is devoid of vegetation, and is barren or lifeless. On the other hand, Secondary Succession happens to the area that has the preexisting soil and had previously inhabited before the disturbance or intervention that led to reduction and devastation of initial inhabitants and their habitat.