by pedalling_faster » Fri 20 Jun 2008, 08:54:37
$this->bbcode_second_pass_quote('green_achers', 'C')orrection on my post above. The worm casting liquid rate was actually about $16,000/#N. Not quite as bad. According to the article, the NPK numbers are extremely small. Not sure what this means, since I've always heard that worm castings are supposed to be very high in nutrients. Maybe it's because liquid fertilizers are mostly water.
available nutrients vs. nutrients locked up in tissue.
when the decomposed plants the worms eat come out the back end, they are ready for use as food, by a plant. helped along by various tiny organisms that transfer food chemicals to the plant's roots.
the fresh grass needs a few years of "cold composting" (like it would get on a forest floor) or 3 months of hot composting (where the bacteria heat up the compost pile) before the nutrients are close to being as available as in the earthworm castings.