Close up of peletized calcium in Hubbard Brook LTER's watershed 1 on the forest floor shortly after application

Close up of peletized calcium in Hubbard Brook LTER's watershed 1

Close up of peletized calcium in Hubbard Brook LTER's watershed 1 on the forest floor shortly after application

From: 
Hubbard Brook LTER Begins 50-Year Study of Acid Rain