44 SCIENTIFIC. REPORTS OF THE AGRICULTURAL RESEARCH 



Green manure used alone gave an increased total crop 

 of 65 per cent, but, notwithstanding this, when used in con- 

 junction with ammonium sulphate it had no appreciable 

 effect. 



The employment of ammonium sulphate as a manure 

 resulted in a considerable increase in the percentage of 

 nitrogen found in the grain, and the increase was ap- 

 proximately proportional to the amount of nitrogen added 

 as manure. The actual variation was 115 per cent, of 

 nitrogen in the grain from the no-manured pots to 2-39 per 

 cent, nitrogen in that from the pots manured at the rate 

 of 320 pounds nitrogen per acre. This very interesting 

 point is being subjected to further investigation. 



XII. Programme of work for 1920-21. 



Major subjecAs. 



1. Continuation of the investigations into the amount 

 and nature of drainage water from fallow and cropped 

 land. 



2. The influence of manurial treatment of the soil on 

 the composition of crops. 



3. The mode of action of phosphatic manures in calca- 

 reous and non-calcareous soils. 



4. A laboratory study of the changes occurring in 

 windrowed cane. 



Minor subjects. 



1. Checking the accuracy of certain methods of analysis 

 in confirmation to the general scheme drawn up at the Con- 

 ference of Agricultural Chemists. 



2. A study of the conditions governing the formation 

 of black alkali in soils irrigated by calcareous water. 



XIII. Publications. 



Harrison, TV. H. . Report on Agricultural Chemistry, 1 918-1 9 r 



for the Board of Scientific Advice. 



