The pH of water determines the solubility (amount that can be dissolved in the water) and biological availability (amount that can be utilized by aquatic life) of chemical constituents such as nutrients (phosphorus, nitrogen, and carbon) and heavy metals (lead, copper, cadmium, etc.).
No clue as to find out how many professional players are in those countries. Baseball in the US This information is for the US only: For Major League Players - There are 30 Major League teams each with a 40 man roster. 30 x 40 = 1200 Then, on average, each team has 6 farm teams in its system with a roster of 25 to 30 players. So 6 x 30 x 30 = 5400.
In baseball, more than any other sport, numbers matter. Here: 56, .400, 3,000. If you're a serious student of the game, you know what those mean, instinctively, without context or clarification. Now, with MLB's collective bargaining agreement set to expire after the 2016 season, another number is getting attention: 162. For more than 50 years, that's how many games have been crammed into the regular-season schedule. It's a grind, a marathon, a spring-to-autumn endurance test.