Bui. 41, Hawaii Agr. Expt. Station. 
Plate IV. 
Fig. 1.— Comparative Influence of Phosphates, Experiment II, Millet I. 
Left to right paired pots: Check; sodium phosphate at rates of 0.007, 0.014, and 0.021 per 
cent P2O5. 
Fiq. 2— Influence of Cowpeas on the Availability of Phosphate Rock, 
Experiment II, Millet I. 
Left to right paired pots: Phosphate rock at the rate of 0.007 per cent P2O5 without cowpeas; 
same with cowpeas; phosphate rock 0.014 per cent P2O5 without cowpeas; same with 
cowpeas. 
