For saving space and soil, this method also has several
other benefits, including no soil-borne diseases, no
weeds to pull and no soil to till, run-of-the-mill side
benefits of soil-less gardening.

Rate of photosynthesis

This does not mean that the rate of photosynthesis will continue to increase with temperature rises. Generally, increases in temperature will affect other photosynthetic processes. Apart from faster growth, relatively high temperatures can cause a reduction in plant quality and yield, such as longer or thinner stems and smaller flowers.


While there is some variation in the results of different studies on the effects of increased C02 levels, the general conclusion must be that the effects are clearly beneficial.

There are several types of horticultural C02 enrichment systems available today. The most sophisticated units rely on very expensive infra-red technology to accurately measure C02 levels, feeding back this information to an electronically controlled C02 injection unit or generator in order to maintain a specified level Of C02 at all times. However, there is currently under development an automatic system which not only maintains a constant level Of C02 in the growing environment, but also adopts data such as the Gaastra curves to maintain the optimum photosynthetic response during the growth cycle of plants. Such a system will point the way to a future of maximal growth for chosen plant.

by: Steven Carruthers


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