without previously turning yellow. When Potash is only slightly deficient, the wrinkles 

 and brown spots are limited to the apex of the leaf. Leaves which are extremely 

 deficient in potash are brittle both in the fresh and in the dry condition. Tobacco 

 poor in Potash, glows badly or not at all and has an unpleasant odour, both of 

 which properties vary according to the intensity of the want. 



When there is poverty in the Nitrogenous constituent. Table 6, No. 3, the leaves 

 assume a light green to yellow green colour, but retain at the same time their 

 natural form. They dry always with a light brown colour first turning yellow. The 

 brown colouring becomes lighter as the nitrogen content decreases. Such leaves on 

 the whole, retain quite good glowing properties and good odour, although both of 

 these appear to suffer when the deficiency in nitrogen is great. If Phosphoric Acid is 

 not present in sufficient quantities. Table 7, No. 4, the leaves assume a dark green 

 colour, often with a mixture of a light reddish bronze tint. Small brown patches, 

 for the most part irregularly distributed, appear on the leaves. Finally at the margins, 

 usually first in the neighbourhood of the apex, larger dark brown places show them- 

 selves on the leaves, which then dry fairly quickly with a dark brown colour, without 

 any transitional yellow stage. Leaves whose phosphoric acid content is small, are 

 when dry, rather brittle; they are, however of good brand, although the odour suffers. 



Crop of dry leaves, average of 2 Control Experiments. 

 No. 1. Complete Manuring 37. 83grams No. 3. Nitrogen Starvation 20.09grams 



No. 2. Potash Starvation 30.37grams No. 4. Phosphoric Acid Starvation 18.55grams 



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