Secrets of the soil /
Tompkins, Peter.
Secrets of the soil / Peter Tompkins & Christopher Bird. - London : Viking Arkana, c1991. - xxiv, 444 p. : ill.
0670835617
91065068
Soils.
Soil management.
Organic farming.
Agricultural ecology.
Secrets of the soil / Peter Tompkins & Christopher Bird. - London : Viking Arkana, c1991. - xxiv, 444 p. : ill.
0670835617
91065068
Soils.
Soil management.
Organic farming.
Agricultural ecology.