Each pot received a dressing of 10 grams Carbonate of lime, 0.120 grams of Magnesia 

 (Mg O) in the form of Magnesium Sulphate, besides a complete mixture of: 

 2.800 grams Nitrogen (N) as Nitrate of Calcium 



16.450 grams Potash (K,0) as Sulphate of Potash 



0.426 grams Phosphoric Acid (P2OS) as Monocalcic Phosphate 

 with Nitrogen deficient, as in complete manuring, but only 0.700 grams Nitrogen (N) 

 with Potash deficient, as in complete manuring, but only 0.188 grams Potash (KjO) 

 with Phosphoric Acid deficient, as in complete manuring, but only 0.142 grams Phos- 

 phoric Acid (P^Oj). 

 The plants depicted on the tables ripened prematurely and were without tops. Each table 

 shows one of the plants (No. 1) receiving complete manure. With complete manure the 

 tobacco plant shows large, juicy green leaves which turn first into yellow and finally 

 die with a light brown or brown colour. Leaves broken off at the beginning of 

 ripening when normally dried, assume similar colouring, burn well, and smell good. 

 With lack of nutrition the plants are always backwards in growth; the leaves, 

 however, vary in their behaviour according to the nature of the want. With Potash 

 starvation. Table 5, No. 2, the leaves curl inwards towards the lower side and 

 the margins become drawn in, — a feature which varies with the intensity of the 

 Potash deficiency. Before this happens, however, yellow spots begin to appear 

 between the veins on the leaf and these turn soon into brown or grey-white. The leaf 

 margins may also be easily torn. The whole leaf finally dries up a brown colour 



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