Harvesting multiple selective

Multiple selective harvesting has long been recognized to increase grape quality. Chaptal (1801), restating established principles, wrote ... 

Further insight on the frequency of multiple residues is evident in Table 14.4, which shows the number of residues found per sample for selected foods tested in 2004 by the PDP. Conventional apples were found to contain, on average, 3.6 residues, while the one positive organic sample had a very minute level of the post-harvest fungicide thiabendazole. The level of residue found in the one positive organic apple sample was 0.0002 parts per million, while the mean thiabendazole residue found in 641 positive conventional samples was 0.43 ppm, over 2100 times higher than the level found in the organic sample. 

The removal of tops, limbs, and cull trees in a selective log harvest, while improving the visual impact, will destroy the cover needed for small animals and birds. A multiple use management approach is necessary when implementing increased forest utilization, but at some sacrifice in yield. Not every acre can be utilized to its fullest potential for biomass production. 

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