Distribution of available soil nutrients in Duolun County located in the interlaced area of agriculture and pasture and reclaimation measure

Sixty-one topsoil samples around Duolun County were collected and analyzed．The results show that soil organic matter content averages 3．10g／kg(0．89～13．68g／kg)，alkaline hydrolytic nitrogen 26．6mg／kg(50．1～ 1325．0mg／kg)，Olsen-P 4．89mg／kg (1．0～ 15．0mg／kg)，available potassium 126．0mg／kg，available zinc 0．68mg／kg (0．18～ 4．18mg／kg)，available manganese 12．9mg／kg(2．44～34．57 mg／kg)，water soluble boron 0．49mg／kg(0．12～0．94mg／kg)，and available molybdenum 0．05mg／kg(0．027～0．091mg／kg)．Evaluations according to the above results indicate that 32．7％ of the soil samples are deficient in available N ，58．9％ in P ，19．5％ in K ，88．7％ in Zn，52．7％ in boron，24．3％in Mn．Distribution map of the available soil nutrients are drawn and reclamation measures are recommended also ．