View Full Table | Close Full ViewTable 1.

P values from the analysis of variance for the effect of years after pruning olives trees, pruning treatment and years × pruning treatment on yield and shaker performance (vibrating time and harvesting efficiency).

 
Source Yield Vibrating time Harvesting efficiency
Year 0.0000† 0.0000 0.0000
Pruning treatment 0.0045 0.0002 0.1076
Year × pruning treatment 0.0037 0.0010 0.4005
P values that suggest significance of the effects requiring multiple comparison are in italics.



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Influence of the interaction of years after pruning olives trees × pruning treatment on olive yield per tree (kg tree−1).

 
Treatment 1997 1998 1999 2000 2001 2002 2003 2004
Manual 26.4hi† 10.9j 43.8cf 21.2ij 16.9ij 43.6cf 19.7ij 58.7ab
Mechanical 26.8hi 20.6ij 51.4bd 18.2ij 35.8eh 33.2fh 41.0df 63.9a
Mechanical + manual 28.2gi 17.4ij 45.1ce 20.0ij 35.0eh 35.9eh 38.5eg 53.0bc
Means followed by the same letter are not significantly different by Duncan multiple range test at the 5% level.



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Influence of years after pruning olive trees on shaker performance in terms of harvesting efficiency (percentage of fruit removed) and vibrating time (s tree−1).

 
Year after pruning Harvesting efficiency Vibrating time
Pruning year 88.6b† 5.0d
first 96.4a 7.2c
second 80.9cd 11.2b
third 79.9cd 7.6c
fourth 80.2cd 7.0c
fifth 72.3e 10.4b
sixth 83.2c 9.8b
seventh 76.4de 23.5a
Means followed by the same letter are not significantly different by Duncan multiple range test at the 5% level.



View Full Table | Close Full ViewTable 4.

Influence of the interaction years after pruning olives trees × pruning treatment shaker vibrating time (s tree−1).

 
Treatment 1997 1998 1999 2000 2001 2002 2003 2004
Manual 4.7j† 6.1hj 10.6cd 7.4gh 6.0hj 11.1cd 8.4eg 21.6b
Mechanical 5.6ij 8.3fg 12.1c 7.7gh 7.3gi 10.1de 11.1cd 22.6b
Mechanical + manual 4.9j 7.2gi 11.0cd 7.8gh 7.7gh 10.1d 9.9df 26.4a
Means followed by the same letter are not significantly different by Duncan multiple range test at the 5% level.