The Formation of Vegetable Mould Through the Action of Worms with Observations on Their Habits by Charles Darwin

Author:Charles Darwin [Darwin, Charles]
Language: eng
Format: epub
Published: 2016-08-15T00:00:00+00:00

(1.) Castings ejected near Nice within about a year, collected by Dr. King on a square foot of surface, calculated to yield per acre 14.58 tons.

(2.) Castings ejected during about 40 days on a square yard, in a field of poor pasture at the bottom of a large valley in the Chalk, calculated to yield annually per acre 18.12 tons.

(3.) Castings collected from a square yard on an old terrace at Leith Hill Place, during 369 days, calculated to yield annually per acre 7.56 tons.

(4.) Castings collected from a square yard on Leith Hill Common during 367 days, calculated to yield annually per acre 16.1 tons.

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