Experiments upon Swedes. 



iy 



Experiments upon White Swedes, in Field No. 19, Royal Agricultural 

 College Farm, Cirencester. 



PER ACRE. 



To Plot I. .. 3 cwt. of phospho-Peruvian Guano, No. 1. 

 II. .. 3 No. 2. 

 III. .. 1J No. 1. 

 IV. .. 3 No. 3. 

 V. .. 3 No. 4. 

 VI. .. 4 cwt. of Binn's patent manure. 

 VII. .. 3 of superphosphate. 

 VIII. . . 3 of fine bone-dust. 

 IX. .. 3 cwt. of superphosphate, made by dissolving the same fine 



bone-dust used in No. VIII., in 50 per cent, of sulphuric acid. 

 X. .. 3 cwts. of bone-superphosphate (purchased). 

 XI. .. Nothing. 

 XII. .. 3 cwt. of home-made superphosphate, made from coprolites 



and fine bone-dust. 



XIII. .. 1 cwt. of sulphate of ammonia. 

 XIV. .. 1| cwt. of sulphate of ammonia, and 1 cwt. of bone-ash, 



dissolved in sulphuric acid. 

 XV. .. 1J cwt. of bone-ash, dissolved in sulphuric acid, without 



ammonia. 



XVI. .. 4 cwt. of gypsum. 

 XVII. .. 4 cwt. of wool-manure for turnips. 

 XVIII. .. 9 cwt. of red ashes alone (the same quantity of ashes was 



used with the manures in the other experiments). 

 XIX. . . 4 cwt. of poudrette de Bondy (Paris nightsoil manure). 

 XX. .. 3 cwt. of Peruvian guano. 



On each plot a good plant was obtained, and the crop singled 

 on the 16th of July, with the exception of the plots upon which 

 sulphate of ammonia and Peruvian guano were employed. The 

 plants here were not far enough advanced to be singled. We 

 have here presented to us another instance, which shows that 

 ammoniacal manures, even when used in moderate quantities, 

 retard the growth of turnips in their first period of existence. 

 Special care, I may mention, was taken in these experiments 

 thoroughly to mix the ammoniacal and other manures with ashes, 

 and to prevent the seed from coming into direct contact with the 

 artificial manures. 



The appearance of the crop was observed from time to time, 

 and the turnips of each plot taken up on the 19th of November : 

 after trimming and cleaning, the whole produce of each plot was 

 carefully weighed. 



The result of these weighings is embodied in the following 

 Table, which also contains the increase of each plot over the un- 

 manured portions. 



c 2 



