Field Experiments in Manuriny, 1903-4. 585 



by oiie sweep of the binder. There were 24 plots in each field, pro- 

 tected by two additional outside border plots. The plan presented 

 below was forwarded early in the season to each farmer who had 

 made application to carry out the tests, and instructions for preparing- 

 the necessary area and a statement of conditions accompanied the 

 plan. 



390 feet long (6 chains). Total area Iji, acres. 

 Each plot is ji, of an acre. 



The farmer was required to have the field in readiness on the 

 arrival of the officer. Although uniformity was maintained as regards 

 the size and ai'rangement of the field throughout the whole of the 

 South, there were variations introduced as regards the manures used. 

 These variations were with the object of meeting differences in 

 climatic conditions, and taking in a wider range of tests than would 

 be possible in a single field of the area specified. There were 

 therefore, three sets of manures made up, designated G, and 02 

 respectively. The sets and 02 differed little in their make up. In 

 the 02 set potash was given in the form of the sulphate instead of the 

 chloride. The combinations employed in the three sets are given 

 below. The numbers of the plots correspond with the numbers on the 

 plan. 



Manures Used in the Yaeious Sets. 



Set G. 



Manures Used per Acre. 



Plot 1. — 1 cwt. ordinary superphosphate. 

 „ 2. — No manure. 



,, 3. — 2 cwt. ordinary superphosphate. 

 ,, 4. — 3 „ ordinary superphosphate. 

 ,, 5. — No manure. 



6. — -2 cwt. ordinary superphosphate. 



f; ,, potash sulphate. 

 7. — 1 ,, ordinary superphosphate 



^ ,, potash sulphate. 

 8. — No manure. 

 9. — % cwt. potash sulphate. 



1 „ sulphate of ammonia. 



