In 2007-13, to be eligible afforestation projects had to cover at least 0.5 ha and be a minimum of 20 metres wide, unless the land bordered a forest (Krol, 2013). This requirement was relaxed for 2014-20: it is now at least 0.1 ha regardless of whether land borders a forest. Highly subsidised collective and state-owned farms, which had accounted for about 20% of farmland, were restructured and many privatised, so that much marginal land was abandoned, especially in the north and west, making it potentially available for afforestation. It is estimated that fallow land increased nationwide from 1% of arable land in 1990 to 18% in 2002 (Kozak, 2010). So far afforestation has taken place on land of poor agricultural quality, with no assessment of its nature value in terms of biodiversity.