II. EXPERIMENTS WITH COMMEEOIAL FER- 

 TILIZERS IN FORCING HEAD LETTUCE.* 



S. A. Beach. 



SUMMAEY. 



Stable manure with and without commercial fertilizers was 

 tried in clay loam mixtures and in sandy loam mixtures for forcing 

 head lettuce. Nitrate of soda was also used in varying quantities 

 in connection with stable manure, acid phosphate and sulphate of 

 potash. 



On clay loam mixed with 15.5 per cent stable manure by weight 

 a slight increase in growth followed the use of nitrate of soda but 

 with double this application of manure practically no advantage 

 followed the use of nitrate of soda, either on the clay loam or on 

 the sandy loam. 



No advantage was gained either on the clay loam or the sandy 

 loam from the addition of sulphate of potash and acid phosphate 

 when the soils had already received a heavy application of stable 

 manure. 



Excellent lettuce was produced on the sandy loam by using com- 

 mercial fertilizers with no stable manure. 



A heavy application of stable manure to the sandy loam put the 

 soil in poor mechanical condition and a crop of inferior lettuce 

 resulted. 



The mechanical condition of the clay loam was improved by a 

 heavy application of stable manure. This mixture produced much 

 better lettuce than was grown on the clay loam where commercial 

 fertilizers were used instead of stable manure. 



Reprint from Bulletin No. 146. 



