8 



Table I. 



Yield of Nitrogen per acre per anyiuin in various Crops grown at Bothani- 

 sted, without Nitrogenoiis Manure. 



Crups, &c. 



Wheat.. 



Barley .... - 



L 



Boot-crops •< 



Beans . . 



L 



Clover 



••••{ 



Barley .... "I 

 Clover . . . . / 



Barley. 



Botation . . < 

 7 courses. ■ 



Condition of Manuring, &c, 



Unmanured 



r 



I 



Complex mineral manure. 



Unmanured 



Complex mineral manure. 



Complex mineral 



Duration of Experi- 

 ment. 



8 years, 1844-51 

 12 years, 1852 -'63 

 12 years, 1864-75 

 24 years, 1852-75 

 32 years, 1844-75 



12 years, 1852-'63 

 12 years, 1864-75 

 24 years, 1852-75 



12 years, 1852-'63 

 12 years, 1864-75 

 24 years, 1852-75 



12 years, 1852-'63 

 12 years, 1864-75 

 24 years, 1852-75 



'Turnips 8 years, 1845-'52 



(Barley) 3 years, 1853-'55 



Turnips 15 years, 1856-70* 



manure "j Sugar beet ... 5 years, 1871-75 



I Mangels 5 years, 1876-'80 



(.Total 36 years, 1845-'80 



Unmanured 



Complex mineral manure , 



Unmanured 



Complex mineral manui'e , 



Unmanured . 



Unmanured . 



Barley after 

 after barley . 



{ 



f After barley . . 

 '" \ After clover . . 

 clover more than 



} 



1. Turnips ' 



2. Barley 



3. Clover or beans 



4. Wheat 



Unmanured . 



Superphos- "I 



phate .. J 



12 years, 1847-'58 

 12 years, 1859-70t 

 24 years, 1847-70 



12 years, 1847 -'58 

 12 years, 1859-'70t 

 24 years, 1847-'70 



22 years, 1849-'70t 

 22 years, 1849-'7o| 



1 year, 1873 

 1 year, 1873 



1 year, 1874 

 1 year, 1874 



28 years, 1848-75 

 28 years, 1847-75 



Average 



Nitrogen per 



Acre per 



annum. 



lbs. 

 25-2 

 22-6 

 159 

 19 

 20' 



•3 



•7 



27 

 17 

 22 



22-0 

 14-6 

 18-3 



26-0 

 18-8 

 22-4 



42-0 

 (24-3) 

 18-5 

 13 1 

 15-5 

 25-2 



48-1 

 14-6 

 31-3 



61-5 

 29 5 

 45-5 



30-5 

 39-8 



37 3 

 151-3 



39-1 

 69-4 



30-3 



36-8 

 45-2 



* Thirteen years' crop, two years failed. 



t Nine years' beans, one year wheat, two years' fallow. 



X Six years' clover, one year wheat, three years' barley, twelve years' fallow. 



