128 RESULTS WITH TURNIPS 



The favourable effect of potash manures on the composi- 

 tion of the root is again apparent. The roots grown with 

 phosphates and ammonia, without potash, are the most watery 

 in the series. 



4. Practical Remarks : Ample illustrations have been 

 given in the foregoing pages of the wonderful capacity of the 

 turnip for obtaining nitrogen from the soil when grown on land 

 w r ell prepared by tillage, and of the handsome return which is 

 consequently obtained under favourable circumstances from 

 manures supplying only phosphates, or phosphates and potash. 

 There is no doubt that this capacity of the turnip for obtaining 

 the nitrogen \vhich it requires from the soil has not been realised 

 by farmers. The directors of the numerous experiments which 

 have recently been made on turnip culture in Scotland and 

 the North of England all unite in condemning as unprofitable 

 the very large applications of dung and artificials which are 

 frequently employed by farmers, and point out that instead of 

 putting the whole of the manure for a rotation on the turnip 

 crop, much greater profit may be obtained by distributing a 

 part of this manure among the crops following the turnips. 



That farmyard manure is an excellent manure for turnips 

 no one can deny, and on some land it is indispensable for the 

 production of a full crop ; nevertheless, when reckoned at its 

 money value, the return yielded by farmyard manure in the 

 crop produced is generally but small. 



On land in a favourable physical condition, and good heart, 

 and in a district not usually suffering from drought, turnips 

 can be economically produced by phosphatic manures, to 

 which potash and ammonia salts may generally be added with 

 decided advantage. If, however, the ammonia salt is to give 

 a profitable return it must be used only in small quantity. 

 Mr. F. J. Cooke of Norfolk, speaking of swedes, says : " 3 to 

 4 cw T ts. per acre of superphosphate, i cwt. of sulphate of 

 ammonia, and \ cwt. of muriate of potash, is an admirably 

 complete and economical dressing for general use." Professor 

 Wright of Glasgow recommends to the Scotch farmers, 6 cwts. 

 of superphosphate, i cwt. of sulphate of potash, with i cwt. 

 nitrate of soda, or 861bs. of sulphate of ammonia. Dr. 



