The Response of <i>Pinus radiata</i> to Manganese Applications at the Ruitersbos State Forest
C. de Rondea South African Forestry Research Institute, Saasveld Forestry Research , Private Bag X6515, George , 6530D B Jamesa South African Forestry Research Institute, Saasveld Forestry Research , Private Bag X6515, George , 6530N. T. Baylisa South African Forestry Research Institute, Saasveld Forestry Research , Private Bag X6515, George , 6530P. W. Langea South African Forestry Research Institute, Saasveld Forestry Research , Private Bag X6515, George , 6530
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ABI
Annotatsiya
SYNOPSIS Although ranked as a minor nutritional problem when compared to the serious phosphate shortages in the Cape forest regions, manganese deficiencies are recorded from time to time, and growth losses have been recorded in P. radiata. Species such as P. pinaster and P. elliottii only show yellowing of needles where extreme deficiencies occur. P. radiata recovers where marginal manganese deficiencies are present, but completely stagnates and eventually dies where deficiencies are more serious. Treament of P. radiata in the nursery before field planting and after establishment is discussed and recommendations are made to prevent or cure disorders.
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