Minimalno obdobje, površin v prahi, mora obsegati vsaj eno vegetacijsko dobo poljščin, iz Uredbe (ES) št. 1251/1999. Za upoštevanje nekaterih posebnih okoliščin pa je treba predvideti uporabo zemljišč v prahi, preden se izteče minimalno obdobje prahe.
The minimum period for which land is to be set aside must extend at least over the growing cycle of the arable crops covered by Regulation (EC) No 1251/1999. However, in order to take certain specific circumstances into account, it should be possible for land set aside to be used before the minimum set-aside period expires.