Haku
Viitteet 1-2 / 2
Soil factors affecting the calcium strontium ratio in plants
(Agricultural Research CentreMaatalouden tutkimuskeskus, 1969)
The effect of magnesium, potassium and nitrogen fertilizers on the contents and ratios of nutrients in spring cereals and grassland crops
(Agricultural Research CentreMaatalouden tutkimuskeskus, 1979)