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Seasonal Variations of Nutrient Content of Armand Pine Needles

Zhang Shuoxin (Dep.of Forest Resource Conservation)  
Describes the seasonal variations and absolute nutrient contents of Armand pine(pinus armandi Franch.)needles.The percentage content of nutrient elements of Armand pine needles were stable from September to October .Sample numbers varied with needle age and contained elements, varied with needle age and contained elements.
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