The difference is the result of higher accumulation rates. (skepticalscience.com)
The experiments also indicated that high - rate application of manures resulted in high accumulation of not only nonextractable N but also leachable N (including nitrate and EON), consequently intensifying leaching - dominated N loss. (sciencedaily.com)
There are a few sites, such as the Santa Barbara Basin, with high accumulation rates (and anoxic bottoms to discourage the worms) that have resolutions that occasionally achieve fifty year discriminations. (williamcalvin.com)