Word: nitrogen
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Dates: during 1990-1999
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...even though the plants are growing more quickly, they are not as healthy, because they lack sufficient nitrogen, which is converted to plant protein...
...high carbon-to-nitrogen ratio in these plants means that they are nitrogen-deficient, because a greater amount of nitrogen is needed to sustain the larger plant...
Consequently, higher levels of carbon dioxide in the atmosphere mean that corn, which is surrounded by a denser growth of weeds, requires more herbicides. Wheat, however, which is more nitrogen-deficient and slightly less healthy, requires higher doses of fertilizer...
...nitrogen deficiency will not only affect the plants, but the ecosystem as well, Bazzaz says...
First, with the amount of nitrogen in plant tissues decreasing, the circulation of nutrients in nature will slow down...