01239naa a2200157 a 450000100080000000500110000800800410001910000170006024500830007726000090016052008090016965000180097865000090099670000180100577300580102312798232025-03-24       1959    bl uuuu     u00u1 u    #d1 aBROWN, G. A.  aA study of stub length and occlusion depth following pruning in Pinus radiata.  c1959  aTwo experiments are described in which the three tools commonly used in pruning operations, the saw, shears, and axe, were compared. In Experiment 1, the projection of the stubs beyond a datum line was measured in relation to branch diameter for each tool used by each of three operators in turn. It was found that appreciable significant differences existed between the resulting linear regression of stub length on branch diameter for the various operator-tool combinations. In Experiment 2 the depth of tissue from stub face to clear wood was measured in relation to stub diameter in stubs pruned by each tool. It was found that only with shears is there a significant regression of occlusion depth on branch diameter. Significant differences existed between the occlusion depths needed for each tool.  aPinus Radiata  aPoda1 aPAWSEY, C. K.  tAustralian Forestry, Canberragv. 23, p. 63-80, 1959.