Abstract: The establishment of soil nutrient abundance index is the base of soil testing and fertilizer reeommen-lotion. From 2006 to 2008，198 rain fed potato 3414 field experiments were conducted in 8 counties of North YinshanareaInner Mongolia. The correlation between the soil nutrient concentration and the corresponding relative yield ofpotato tubers in different fertility levels was analyzed soil nutrient abundance indexes of North Yinshan area was es-tablished initially and recommendation rates were also calculated from the fertilizer effect functions. The total soil Nwas classified as 5 degrees of very low(<0.80g/kg)，low(0.80－ 1.19 g/kg)，medium(1.19－ 2.16 g/kg).

Key words: Rain fed potato, North YinshanSoil nutrients, Abundance index, Fertilization recommendation

CLC Number: 

• S532