94 Use of Liquor from Gasworks. [may, 



only may give nearly as good results as dung and artificials on 

 the following root crop, especially if this is swedes, but when 

 all the crops of the rotation are taken into account there is a 

 distinct advantage in the combination. Professor Gilchrist 

 therefore suggests that lo to 12 tons dung, 4 cwt, slag, cwt. 

 superphosphate, J- cwt. nitrate, and \ cwt. sulphate of ammonia, 

 represent a fair dressing for swedes and turnips. The artificials 

 would all be applied in the drills and the dung in the drills or 

 previously. 



For potatoes, i cwt. muriate of potash in the drills, and i cwt. 

 nitrate as a topdressing afterwards might be used in addition. 

 For mangels, 2 cwt. common salt and (on light soils only) I cwt. 

 muriate of potash maybe added in the drills, and cwt. nitrate 

 in two topdressings afterwards ; and for cabbages somewhat the 

 same manuring as for potatoes may be adopted. 



On the lighter and more hungry soils it may be advisable to 

 apply dung and only part of the artificials to the roots and to 

 reserve the greater part of the slag, half of the potash manure^ 

 and a small part of the nitrogenous manures for the seeds hay. 



Nitrate of soda or sulphate of ammonia may be used with 

 advantage to a moderate extent only as topdressings for the hay 

 and cereal crops when necessary. The results indicate that no 

 disadvantage follows from the use of these when a system of 

 liberal manuring is adhered to, but that they have not good 

 effects when the soil is in low" condition, or when continued 

 without other manures. 



The foregoing suggestions are framed so that they may admit 

 of easy modification. Local circumstances and prices must 

 determine which manures it will be advisable to use. 



Some experiments have been carried out at the Federal 

 Institute of Agricultural Chemistry at Lausanne* with a view of 

 testing the value for agricultural purposes 



Use of Liquor Qf j-j^g liquor from p;asworks. The water 

 from Gasworks. , . , . ^ 



used m the purification of coal-gas contains, 



among other products, a small quantity of ammonia, and that 



* Bu/l. Mensnel, French Dept. of Agric, March, 1906. 



