Welcome to DU! The truly grassroots left-of-center political community where regular people, not algorithms, drive the discussions and set the standards. Join the community: Create a free account Support DU (and get rid of ads!): Become a Star Member Latest Breaking News Editorials & Other Articles General Discussion The DU Lounge All Forums Issue Forums Culture Forums Alliance Forums Region Forums Support Forums Help & Search

GreatGazoo

(3,977 posts)
4. they are old school numbers -- if you divide by 2 you get PPM
Tue Apr 21, 2015, 02:43 PM
Apr 2015

so for example Phosphorous is 10.5 PPM

Recommendations

0 members have recommended this reply (displayed in chronological order):

Latest Discussions»Culture Forums»Gardening»Got a soil test...now if ...»Reply #4