HAPPY INDIA 



81 



It is always possible to get a good crop out of 

 land for two or three years by manures which excite 

 the reserve constituents of the ground, but which 

 exhaust it, therefore for a permanency it is necessary 

 to supply manures which will restore to the ground 

 the necessary minerals, but the ground-nut cake, 

 the super and the kainit give nitrogen, phosphoric 

 acid and potash. 



On page 335 Mr. Kenny quotes from reports of 

 the Department of Agriculture of the United States 

 experiments made in the United States, which show 

 that cotton may be grown with the following weights 

 per acre : 



PLANT FOODS TAKEN FROM 

 THE LAND BY THE CROP. 



Mr. Kenny remarks that, as regards the lint, it 

 takes so little out of the ground, that if all the rest 

 of the plant were restored to the earth the land 

 would not require manuring, but of course that is 

 not possible. The seeds are used to a great extent 



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