Want to talk about soil? Join us for Open Call every Tuesday until Mar. 30 and our kick-off call on this topic on Feb. 2! Click here for details on how to join!


Author Comment Last activity Moderation
masolaric "Dear Warren, I upload some picture of teh setup and also the spectrum... The light is not refracted... ¿What do you think about the problem? tha..." | Read more » over 6 years ago