[ 发表于: Pollution ]
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Foliar symptoms on Norway spruce and relationships to magnesium deficiencies
1990
Ke, J. (Pennsylvania State Univ., University Park, PA (USA). Dept. of Plant Pathology) | Skelly, J.M.
Wageningen University & Research - Netherlands
Nutritional disturbances and declining Armand Pine in southwestern China
1990
Guangjing, M. (Chinese Academy of Forestry, Beijing (China). Research Inst. of Forestry)
Wageningen University & Research - Netherlands