LIST OF FIGURES 



FiGURE ' PAGE 



1. View of tractor and tiller 53 



2. Tiller in operation , 55 



3. Layout and numeric designation of poultry houses at the 



tilling site 56 



h. A tagged pupal trap after removal from manure pack 58 



5. Light trap opposite egg processing room 65 



6. Light trap betv/een egg cooler and house h 66 



7. Panel with guttering suspended by chains at the tilling 



site 68 



8. A pair of workers examining a hen for mites 70 



9. A close-up view of Figure 8 70 



10. The appearance of fairly dry manure after tilling 77 



11. Manure which has dried enough to form particles of various 



s i zes when t i 1 1 ed 79 



12. Experimental design for adding builder's sand and wood 



chips to houses 1 through A at the tilling site 81 



13- The appearance of chips before spreading 82 



\k. The appearance of chips after the initial tilling 82 



15- The appearance of manure collection areas at the tilling 



site after manure removal and subsequent flooding 85 



16. Addition of wood chips to flooded manure collection areas... 86 



17. Met results of the manure drying experiment with wood chips 



and t i 1 1 ing 88 



18. The manure in 3~B at the end of the experiment 90 



xi 1 



