Haku
Viitteet 21-23 / 23
Effects of heavy nitrogen dressings upon release of potassium from soils cropped with ley grasses
(Agricultural Research CentreMaatalouden tutkimuskeskus, 1973)
The effect of rate of leys and intensity of nitrogen dressing in different crop rotations : results obtained in the years 1958-65 from a rotation trial established at Tikkurila in 1952
(Agricultural Research CentreMaatalouden tutkimuskeskus, 1967)
Nautakarjan laitumen typpilannoituksesta
(Agricultural Research CentreMaatalouden tutkimuskeskus, 1971)