The fertilizer plans drawn up cover around 6.3 million decares, or 62 per cent of Norway's total farmland. This is an increase of over 1 million decares from the year before. How much of the total area in cultivation is covered by the plans varies from one county to the next.
In 1997, 44,500 Norwegian farms had fertilizer plans based on soil sampling. This comprises 56 per cent of all farms with at least five decares (one decare=0.2471 acres) of farmland in production. In 1990 only 25 per cent of Norway's farms had drawn up a fertilizer plan.
As in 1996, Nord-Trøndelag and Nordland municipalities have the highest coverage rates, with 69-70 per cent, while Vestfold, with 47 per cent, and Hordaland, with 52 per cent, have the lowest. Coverage rates are far higher for large farms. The plans cover 29 per cent of the farmland in production on farms with less than 50 decares of under cultivation and 73 per cent of the farmland on farms with at least 500 decares of productive agricultural land.
Weekly Bulletin issue no. 4, 1998