Table 2.
Summary of manure loading into and removal from the storage bays of the conventional cage (CC), aviary (AV), and enriched colony (EC) houses during the 2 flock cycles.
| Period | Manure loaded or removed* | Housing system | ||
|---|---|---|---|---|
| Conventional cage (CC) | Aviary (AV) | Enriched colony (EC) | ||
| November 2011 to May 2012 | Manure loaded (tonne) | 723 | 703 | 676 |
| Manure removed (tonne) | 531 | 509 | 498 | |
| % of total output | 6% | 32% | 26% | |
| Equivalent no. of hens | 11,600 | 14,700 | 11,700 | |
| August 2012 to March 2013 | Manure loaded (tonne) | 798 | 681 | 698 |
| Manure removed (tonne) | 548 | 502 | 504 | |
| % of total output | 7% | 28% | 26% | |
| Equivalent no. of hens | 13,600 | 13,300 | 12,200 | |
| April 2013 to August 2013 | Manure loaded (tonne) | 943 | 688 | 728 |
| Manure removed (tonne) | 730 | 504 | 583 | |
| % of total output | 15% | 54% | 54% | |
| Equivalent no. of hens | 29,700 | 24,500 | 24,500 | |
*Manure loaded is the total mass of manure placed into each storage bay over the monitoring period. Manure removed is the total mass of manure removed from each storage bay at the end of the monitoring period.