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Table 2 Effect of pulsator ratio (60:40 and 67:33) and pulsation pattern (alternate = 2 × 2, simultaneous = 4 × 1) with WB and NB clusters on teat tissue changes (mm), mean milk yield (kg) and mean milking time (seconds) with mid-level milking - Experiment 2

From: Effect of liner design, pulsator setting, and vacuum level on bovine teat tissue changes and milking characteristics as measured by ultrasonography

Pulsator ratio 60:40 60:40 60:40 60:40 67:33 67:33 67:33 67:33   
Pulsation pattern 2 × 2 4 × 1 2 × 2 4 × 1 2 × 2 4 × 1 2 × 2 4 × 1   
Cluster type WB WB NB NB WB WB NB NB s.e.d  
Canal length 2.98 3.16 2.72 2.47 2.39 2.69 2.80 3.14 0.41  
Teat diameter 1.47 1.76 - 0.36 - 0.09 1.10 1.04 0.40 0.04 0.38  
Cistern diameter - 7.96 - 7.38 - 7.99 - 7.44 - 7.96 - 9.17 - 6.99 - 8.12 0.68  
Wall thickness 3.56 3.30 2.90 2.50 3.40 4.40 2.60 2.90 0.26  
Teat length 10.37 10.44 10.53 9.22 9.60 11.00 9.60 8.50 1.50  
Milk yield 16.93 17.02 16.45 15.36 17.62 17.26 16.35 16.39 0.42  
Mean milking time 495 488 650 629 484 468 581 572 25.8