Darwin on humus and the earthworm;
Darwin, Charles, 1809-1882.
Darwin on humus and the earthworm; the formation of vegetable mould through the action of worms with observations on their habits. With an introd. by Sir Albert Howard. - London : Faber and Faber, 1945 - 153 p. : illus. ; 23 cm.
First published in 1881 under title: The formation of vegetable mould through the action of worms.
Earthworms.
Humification.
QL391 / D37 1945
Darwin on humus and the earthworm; the formation of vegetable mould through the action of worms with observations on their habits. With an introd. by Sir Albert Howard. - London : Faber and Faber, 1945 - 153 p. : illus. ; 23 cm.
First published in 1881 under title: The formation of vegetable mould through the action of worms.
Earthworms.
Humification.
QL391 / D37 1945