Based on precision validation of the EPIC model,dynamic changes of water productivity of biomass,available soil water amount in 0-10 m soil layers and soil moisture distribution in soil profile of artificial Chinese pine tree(Pinus tabulaeformis Carr.)forestland in the north Shaanxi were simulated with EPIC model in 45 years period,to uncover the law for changes of water productivity and soil s desiccating efficiency.The results showed that:(1) Water productivity of 1 year-old to 13 year-old artificial fore...
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