Haku
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Effects of nitrogen fertilization on the Ca/P ratio of grass herbage
(Agricultural Research CentreMaatalouden tutkimuskeskus, 1977)
The effect of nitrogen fertilization on the copper/molybdenum ratio of grass herbage
(Agricultural Research CentreMaatalouden tutkimuskeskus, 1977)
Fertilizer value of silage effluent
(Agricultural Research CentreMaatalouden tutkimuskeskus, 1987)
Silage effluent: nutrient content and capacity to reduce ammonia loss when mixed with urine on slurry
(Agricultural Research CentreMaatalouden tutkimuskeskus, 1987)