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| | Plants & Human Affairs |
 | | A good plant growth medium should retain sufficient moisture, provide adequate aeration (pore space), be firm enough to support the plant, not contain detrimental substances including toxins or diseases, be able to be sterilized, and have a uniform consistency. |
 | | As the density of the medium increases, the water held at field capacity:________ (increases, decreases, is not affected) |
 | | As the density of the medium increases, the air space at field capacity:_________ (increases, decrease, is not affected). |
| employees.csbsju.edu /ssaupe/biol106/Labs/grow_medium.htm (1134 words) |
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