1921.] 



Manures in January. 



963 



lisers increase the resistance of the plant to the attacks of the 

 wilt organism. 



At the Cheshun^i Experimental Station liberal treatment with 

 potassic fertilisers makes the tomato plant more resistant to the 

 bacterial stripe disease : the numbers of plants affected out of 

 a total of 120 in each plot were* : — 



Potassic fertihsers often afford the simplest method of dealing 

 with fungoid diseases, and they are usually more effective than 

 other fertilisers under glass. 



Are Mineral Phosphates Effective as Fertilisers? — This ques- 

 tion is now being asked by a number of farmers, and details of 

 some of the experiments are given from time to time in these 

 notes. Broadly speaking the result at present is : Where basic slag 

 cannot he obtained in sufficient quantity it is icorth while trying 

 mineral ^phosphates, provided that they are sufficiently finely 

 ground. Judging from the trials already made there is reason 

 to expect that they will prove useful on heavy clay grazing land 

 where the he^'bage is in poor condition. They may also prove 

 useful (though the evidence at present is not complete) on arable 

 land for the growth of swedes and turnips. Judging from foreign 

 experience they should also prove useful on sour soils badly 

 deficient in lime. 



Variety. 



Comet... 

 Kondine Red ... 



Complete 

 Fertiliser. 



40 

 13 



Xo Pota.'isic 

 PertiUser. 



78 



33 



* S. G. Pdine and F. W. Bewley, AnaaU of Applied Biology, 1919.6.185. 



