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0 60 120 180 240 300 360 420 480 540 600 Days after closure

FIGURE 4.25 Gas dynamics for the first enclosure experiment at Biosphere 2. Note the decline in oxygen before artificial additions were required. (From Cohen, J. E. and D. Tilman. 1996. Science 274:1150-1151. With permission.)

0 60 120 180 240 300 360 420 480 540 600 Days after closure

FIGURE 4.25 Gas dynamics for the first enclosure experiment at Biosphere 2. Note the decline in oxygen before artificial additions were required. (From Cohen, J. E. and D. Tilman. 1996. Science 274:1150-1151. With permission.)

Growing Soilless

Growing Soilless

This is an easy-to-follow, step-by-step guide to growing organic, healthy vegetable, herbs and house plants without soil. Clearly illustrated with black and white line drawings, the book covers every aspect of home hydroponic gardening.

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