Comment Re:An economic and environmental disaster (Score 5, Insightful) 99
The fertilizers used on lawns is blamed for the red tide outbreaks by feeding the organisms, it is believed.
Not to mention that most people (pro landscapers included) dump a lot more phosphorus than is necessary. A mature lawn needs very little phosphorus fertilizer, and in most areas none at all because the soil has enough. Using a phosphorus free fertilizer, which still contains the nutrients the plant needs such as nitrogen and potassium, is sufficient in most areas. And yet, general purpose fertilizer is often used (flowers and fruit needs phosphorus), and even fertilizer marketed for lawns usually unnecessarily contains fertilizer. And that's all about marketing and distribution. The fertilizer companies want to produce stuff they can market everywhere. Additionally, what are most people who don't know anybody going to buy, the fertilizer that says "27-3-10" or the one that says "27-0-10." The former of course, because 3 is better than 0! And lots of "lawn food" products contain plenty just for good measure without even having the N-P-K ratio on the label.
Education in this area would go a loooong way. Educate the public, the professional landscapers, and the fertilizer suppliers. There are even some municipalities where it's illegal to dump phosphorus containing fertilizer on lawns. Yes, it's easy to get away with breaking that ordinance (especially with the pretty labels at Home Depot), but what having the ordnance does in particular is educate the landscapers who will then buy phosphorus free fertilizer, which will in turn educate (to some degree) the public, and make phosphorus free fertilizer more available and the de facto standard.