MANURES SUITED FOR SPECIAL CROPS 223 



Forage. The difficulties and expense of making hay, 

 and the heavy cost of root growing, combined with the 

 equally high cost of labour, are inducing farmers to turn their 

 attention more and more to the production of silage. For 

 this purpose various green crops are grown, which can be 

 loaded into the silo in small amounts at a time without 

 putting any great strain upon available labour. The har- 

 vesting is therefore extended over a much longer interval of 

 time. Where it is desirable to obtain large crops of green 

 fodder, fertilizers are very necessary, and generous dressings of 

 superphosphates, sulphate of ammonia and potash salts have 

 usually proved profitable. One of the difficulties of the 

 growth of root crops is the lack of sufficient rainfall in the 

 district, and lack of water will still trouble the man who 

 tries to grow large forage crops. 



Golf Courses. To establish a good surface on clay 

 soils through the green, 5 cwt. of basic slag every few years 

 makes the best foundation; but on the greens, i oz. of 

 sulphate of ammonia per square yard once a year is needed 

 to keep down clovers, which make putting erratic ; on the 

 fair way clovers are good. 



REFERENCES TO SECTION IV. 



" Notes on Manures for May," from the Rothamsted Experimental 

 Station, Journ. Bd. Agric., April, 1919, p. 83. 



Russell, " Characteristics of Good Nitrogenous Fertilizers," Journ. Soc. 

 Chem. Ind., 1918, p. 45 R. 



Hall, " Fertilizers and Manures," p. 300 (John Murray). 



Ashby, " A Contribution to the Study of Factors Affecting the Quality 

 and Composition of Potatoes," Journ. Agric. Science, 1905, i. 347-57. 



Hendrick, " Field Trials with Nitrogenous Manuring," Journ. Soc. Chem. 

 Ind., 1911, 523. 



Middleton, " Systems of Farming and the Production of Food," Journ. 

 Bd. Agric., 1915-16, p. 520. 



Wibberley, " Continuous Cropping," Journ. Bd. Agric., 1914-15, 

 p. 817. 



Robertson, " Trials on Grass Land with Open-Hearth Basic Slag and 

 Rock Phosphates," Journ. Bd. Agric., January, 1918, p. 1077. 



Somerville, " Poverty Bottom," Journ. Bd. Agric., 1917-18, p. 1186. 



" Manuring of Grass Land for Milk," Journ. Board Agric., March 1914, 

 p. 1103. 



Parke and Dyer, " Manuring of Meadow Hay," Journ. Board Agric., 

 November, 1913, p. 715. 



Collins, " Plant Products," p. 169 (this series). 



