Some fantastic micro-photographs of marijuana leaves. This photograph stood out for me as it's a common point of discussion among'st growers. How to get rid of the chemical taste left after using synthetic fertilizers on your crop.
Most synthetic fertilizers leave a "salt/chemical" buildup which needs to be flushed out of the plant before harvest. If it's isn't flushed, chemical crystals remain giving the herb a "harsh taste". This picture shows why it might be wise to start growing all your edibles organically. When grown using organic fertilizers no chemicals are left in, or on the plant.
I would assume this same idea holds true for most crops grown with chemical fertilizers. This does not even take into account possible synthetic pesticides being used.
More photos here:http://www.leafscience.com/2014/04/22/heres-marijuana-looks-like-microscope/