Stock carried on the farm, which is at 1335 Puketoi Rd, last year included 6300 Romney ewes, 2100 ewe lambs and 750 steers.
The judges said stock condition was excellent and the station kept comprehensive records of stock production, often on a paddock-by-paddock basis.
They noted that climatic conditions in the district were highly variable and some areas of Rangedale, which rises from 300 to 700m above sea level, were very exposed.
Correct land use was a real focus for the station, the judges said.
Two quite different soil types had been identified and these were carefully managed to minimise any detrimental effects, they said. Cattle were wintered on limestone soils to avoid pugging pasture, while sheep were wintered predominantly on papa-based country.
The judges said farm staff showed an excellent understanding of the soils on the farm, with soil testing undertaken regularly and fertiliser applied accordingly.
As well as winning the Horizons supreme title, Rangedale also won the Dalrymple Habitat Award and the Horizons Regional Council Award, for the farm's integration of trees.
The Horizons competition was open to all farms in the Horizons regional council catchment.
The winner of the Wellington event, open to farms in the Greater Wellington area, is due to be announced on April 26.
A field day on the winning property of that competition is set down for May 16.
The Ballance Farm Environment Awards are unlike other events, New Zealand Farm Environment Trust general manager David Natzke said.
"Entrants are not seeking major prizes or overseas trips," he said.
"Most instead are seeking to share their ideas and expertise with the wider farming community.
"They are seeking to have a ruler run over their enterprise to provide a personal benchmark."
