Haku
Viitteet 1-2 / 2
Acid-induced leaching of elements from cultivated soils
(Maatalouden tutkimuskeskus, 1991)
Acid ammonium acetate and acid ammonium acetate/EDTA as extractants for phosphorus-32, aluminum and iron in soils
(Agricultural Research CentreMaatalouden tutkimuskeskus, 1977)