Results of another large and well-replicated trial described in Fig. 4.24 show that increasing the number of birds placed per
square metre at 17 days reduced growth to 46 days, and analysis of the data provides the following estimates of the effect of space in the range 4–8 birds per m2 on growth and cumulative feed intake to 46 days, with live weight and feed intake expressed as a percentage of live weight and cumulative feed intake of birds placed at 4.1 birds per m2