Haku
Viitteet 1-2 / 2
Plant-available boron in soils and the boron requirement of spring oilseed rapes
(Agricultural Research CentreMaatalouden tutkimuskeskus, 1985)
Mineral composition and its relation to texture and to some chemical properties in Finnish subsoils
(Agricultural Research CentreMaatalouden tutkimuskeskus, 1974)