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.
Each Major League Baseball team maintains both a 25-man roster and a 40-man roster of players. Players on the 25-man roster are eligible to play in official major league games throughout the season. Once a player has been placed on a team's 40-man roster, a team has 3 option years on that player. 2  A player is considered to have used one of those three option years when he spends at least 20 days in the minors in any of those 3 seasons.