ioo PLANT PRODUCTS 



the experiments should have a fairly accurately known 

 composition, as otherwise much ol the labour will be thrown 

 away. A useful type of experiment would be, one plot 

 of lime, a second plot basic slag, a third plot with sulphate 

 of ammonia, a fourth plot with potash manure, and a fifth 

 plot with no manure at all. These might be all cross- 

 dressed with other manures, or even with the same manures 

 applied over again. If the same manures are applied over 

 again in the cross-dressing as in the first dressing, one will 

 get, of course, a double dressing in one case, and a compound 

 dressing in another, but each case will have to depend upon 

 its own merits. The term " reclamation of land " is some- 

 times restricted to warping. The process of warping consists 

 in flooding and silting up swamps. Where hill streams or 

 tidal estuaries exist, the low-lying land can be flooded from 

 time to time, and a large quantity of silt deposited. Such 

 silt is very fertile. No general principles can be dictated 

 on this subject, it is a question of management. 



REFERENCES TO SECTION III 



Leather, " Memoirs of the Department of Agriculture in India," June, 



1917. "The Pot-Culture House," p. 43. (Thacker, Spink and Co., Calcutta.) 

 Hilgard, " Soils," pp. 399 and 422. (Macmillan.) 

 McConnell, " Agricultural Note Book," p. 81. (Crosby Lockwood.) 

 Gorham, "Reclaiming the Waste," pp. 118, 142. (Country Life.) 

 Stokes, "Some Cases of Infertility in Peaty Soils," Journ. Board 



Agriculture, 1913-14, p. 672. 



" The Reclamation of Waste Land," Journ. Board Agriculture, 1914-15, 



p. 681. 



Howard, "The Irrigation of Alluvial Soils," Agric. Journ. Ind., 1917, 



p. 185. 



Carey and Oliver, "Tidal Lands." (Blackie.) 



