. 



ROTATION OF CROPS. 



233 



LE 63. — Experiments on the Rotation of — Roots, Barley, Clover (or 

 Beans), or Fallow, and Wheat ;. in Agdell Field, Rothamsted. 8 courses, 

 32 years, 1852-1883. 



AVERAGE AMOUNTS OF PHOSPHORIC ACID PER ACRE PER ANNUM IN THE ROTATION 

 CROPS, COMPARED WITH THOSE IN THE CROP3 GROWN CONTINUOUSLY. 



BARLEY. 



( Rotation . 

 Gram -' Continuous . 



I Rotn. -for - cont 



Straw 



/"Rotation . 

 -J Continuous . 

 I Rotn. -for - cont 



/"Rotation . 



T'ltal -' Continuous 



I Rotn. -for -cont 



11.24 11.59 

 6.95 6.95 



1.87 

 1.10 



13.11 

 8.05 



2.03 

 1.10 



0.77 ! 0.93 



13.62 

 8.05 



11.02 



6.95 



1.82 

 1.10 



12.84 

 8.05 



9.89 

 6.95 



1.74 

 1.10 



0.64 

 11.632 

 8.05 



3.58 



12.29 

 10.00 



1.80 

 1.33 



0.4,7 



14.09 

 11.33 



11.91 

 10.00 



1.85 

 1.33 



13.76 

 11.33 



15.52 

 10.00 



2.32 

 1.33 



17.84 

 11.33 



16.16 

 10.00 



2.38 

 1.33 



18.54 

 11.33 



18.34 

 21.31 



2.87 

 3.30 



21.21 

 24.61 



-3.40 



18.63 

 21.31 



2.96 

 3.30 



21.59 

 24.61 



-3.02 



21.04 i 20.90 

 21.31 I 21.31 



3.68 

 3.30 



0.38 



24.72 

 24.61 



3.53 

 3.30 



24.43 

 24.61 



-0.18 



BEANS (6 COURSES), CLOVER (2 COURSES), OR FALLOW. 



Com 



/"Rotation . 

 - Continuous . 

 I Rotn. -for -cont, 



Straw 



Total 



( Rotation . 

 • Continuous . 

 ( Rotn. -for -cont 



/■Rotation . 

 1 Continuous 

 v Rotn. -for - cont 



Clover /Rotation - 



Uovel (Continuous 



Average of 8 courses, ) 

 beans and clover J 



5.15 

 2.11 

 3.04 

 1.17 

 0.63 

 0.54 

 6.32 

 2.74 

 _ ' >S 

 8.04 



6.75 



5.14 

 2.11 



1.17 

 0.63 



0.54 



6.31 

 2.74 



6.96- 



6.482 



6.8L 

 3.16 



1.78 

 0.95 



0.83 



8.59 

 4.11 



| 4.48 



20.30 



•I 



11.52 



8.18 

 3.16 



1.97 

 0.95 



10.15 

 4.11 



11.49 

 6.75 



1.99 

 1.24 



13.48 

 7.99 



31.09 



18.03 



13.05 

 6.75 



2.06 

 1.24 



15.11 

 7.99 





Calculated on average produce of 19 years, 1849-52 and 1856-70. 2 Probably crop too low owing to a dell. 



