10 SCIENCE BULLETIN, No. 10. 



accepted for New South Wales conditions, and referring solely to the wheat 

 crop. It is of interest to know that the Department of Agriculture in the 

 Transvaal, after numerous analyses of soils of known cropping powers, 

 arrived at the conclusion that if the amount of available P 2 O B fell below 

 005 per cent., a phosphatic fertiliser was required for the maize crop. 



In conclusion, the results obtained from the small number of soils treated 

 are sufficient to indicate that further research along similar lines, but 

 covering a much wider range of soils, is desirable, and likely to lead to 

 results of value. 



My grateful thanks are due and hereby tendered to Professor Watt and 

 Mr. G. Wright, Lecturer in Agricultural Chemistry, for the constant help 

 and advice given while carrying out the work. 



: William AppleipiteG.d irk. (Jovernuu-nt Printer. 1913. 



