Nutrient imbalances in agricultural practices

Posted by Michelle:

I came across a policy discussion relating to nutrients (primarily N) in agricultural processes. The original article appeared in Science in June, with responses in the most recent issue (30 October 2009). The idea of reclaiming N in human waste for agriculture is not new, but obviously a topic that makes people uncomfortable. I had not realized that in urban centers alone, the N in human waste is equal to the amount of N fixed for agricultural purposes. What follows then is the problem of distribution, in other words, how do we get urban N to agricultural areas? Talk about recycling!


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