ELEMENTS OF CROPS. 351 



OAT STRavV. 



Oat straw is estimated at about 15 cwts. per acre ; one part 

 becomes, when dried in vacuo, 0.713 ; one part burned leaves 0.0509 

 of ash : 



Carbon 49.93 50-25 



Hydrogen 5.32 5.48 



Oxygen 39.28 38.80 



Azote 0.38 0.38 



Ash 5.09 5.09 



100-00 100.00 



FIELD BEET OR MANGEL-WURZEL. 



On a freshly manured soil, the average produce of beet at Bechel- 

 bronn is 10 tons, 15 cwts. 1 qr. per acre. The worst crops do not 

 fall below 5 tons, 2 cwts. 1 qr. 14 lbs., and the best do not exceed 

 16 tons, 7 cwts. 1 qr., results which I took occasion to observe varied 

 sensibly from those obtained in different places. I stated that 

 Schwertz and Thaer make the average 14 tons, 14 cwts. 2 qrs. 16 

 lbs. McElinger, after taking the mean of ten years, adopts 11 tons, 

 1 cwt. 3 qrs. 6 lbs. At Roville, M. de Dombasle speaks of 7 tons, 

 3 cwts. 26 lbs. as the mean of seven years. 



At Bechelbronn, the leaves of the beet are not given to cattle ; 

 they are left upon the ground. A piece of beet-root weighing 1 oz. 

 16 dwts. was reduced to 4j\, say 5 dwts. after being stove dried. 

 After complete desiccation, at 230° F. one part of root became 0. 122 ; 

 one part of roo<^ left upon incineration 0.0624 of residuum : 



Carbon 42.75 42.93 



Hydrogen 5-77 5.94 



Oxygen 43.58 43.33 



Azote 1.66 1.66 



Ash 6.24 6.24 



100.00 190.00 



RYE. 



Rye is seldom introduced into the rotation at Bechelbronn. They 

 reckon its produce at 26 bushels per acre, when it has had a sup- 

 plementary dose of manure. The bushel weighs fully 58 lbs. I 

 have taken the proportion of grain to straw as 45 is to 100. One 

 part of rye, dried at 230° F. weighed 0.834; one part incinerated 

 left 0.0237 of ash: 



I. II. III. 



Carbon 46.35 45.72 46.38 



Hydrogen 5.38 .5.70 5.74 



Oxygen 44.21 44.52 43.82 



Azote 1.69 1.69 1.69 



Ash 2.37 2.37 2.37 



100.00 100.00 100.00 



RYE-STRAW. 



One part of straw, completely dried, weighed 0.813 • one part of 

 which, incinerated, left 0.0368 of ash : 



