76 



On the Inorganic Constituents of Plants, 



average value is about £14 per ton, hence the above quantity 

 would cost £2. 2s. per acre. The produce was 



Whole crop per rod 47 7 per acre 3 7 87 



Grain 10 11 15 34 



Straw 30 13 2 3 107 



Chaff 5 15 8 58 



The proportion of grain to the whole crop therefore was as 

 2257 to 10000. One thousand seeds weighed 651 grains. The 

 standard measure full weighed 41 95 grains, hence the bushel would 

 weigh 60 lbs. 



This salt decidedly produced a beneficial effect on the wheat ; 

 the plants were large and flourishing, the straw appeared stiffer 

 than most of the others, and when the wheat had come into ear 

 and the grains were ripening, the remarkable change in colour 

 adverted to when describing the effect produced by Muriate of 

 Potash, was observed. 



22. Sulphate of Potash and Silicate of Potash. These sub- 

 stances were applied at the rate of 3 cwt. of the former and 1| 

 cwt. of the latter, the produce was 



The proportion of grain to the whole crop was therefore as 

 1836 to 10000. One thousand seeds weighed 610 grains. The 

 standard measure full weighed 4069 grains. Hence the bushel would 

 weigh 58^ lbs. The plants in this square were very large and 

 healthy, the straw was remarkably stiff, and the ears were larger 

 and full. On comparing together all the squares manured with 

 Silicate of Potash, the plants in this square appeared the finest. 



23. Nitrate of Soda. This salt was applied at the rate of 3 cwt. 

 per acre. At the present price of £17. per ton, this quantity 

 would cost £2. 11*. The produce was 



