On the Groicth of Barley hy different Manures, 8fc. 499 



obtained after many successive turnip crops, which had been 

 respectively grown, without manure, anil with an excessive 

 supply of mineral manures : — 



; Table XIII. 



Produce of Unmanubed Barley, in the continuous Series in Hoos-Fielu, 

 compared with that after many Crops of Turnips either Uumanured or with Mineral 

 Manures. 



Produce of Barley per Acre. 



Total Average 

 (3 Years.) Annual. 



Increase, or Loss, 

 per Acre. 



Total 

 (3 years.) 



Average 

 Annual. 



Dressed Com per Acre, in Bushels and Pecks. 



Hoos-Field— Unmanured Plots . . . 



Barn-Field ( ^S'''' Unmanured Turnips 



I Alter Mnieral-manured 1 u 



bsh. pk. 



Total Com, per Acre, lbs. 



Hoos-Field — Unmanured Plots . . . 

 T3._„ T7j„i,i /After Unmanured Turnips 

 l^arn-Ji'ieia ^ ^^^^^ Mineral-manured fur 



1547 

 1149 

 1185 



1940 

 1012 

 1077 



1934 

 1016 

 1078 



5421 

 3177 

 3340 



1807 

 1059 

 1113 



Total Straw, per Acre, lbs. 



Hoos-Field— Unmanured Plots 



■D™ „ T7i„i,i / After Unmanured Turnips . . 

 iJarn-l-ield '^ ^^^^^ Mineral-manured Turnips 



Total Produce (Com and Straw) per Acre, lbs. 



Hoos-Field— Unmanured Plots 



■Ro.„ TTJoi,! /After Unmanured Turnips . . 

 iJarn-1- leia y ^^^^^ Mineral-manured Turnips 



3412 4335 

 2057 2542 

 2618 2474 



3868 

 2172 

 2206 



11615 

 7371 

 729S 



3872 

 2457 

 2432 



Comparing the produce of barley on the unmanured plots in 

 the two fields, and without going into the detail of the separate 

 years, it is seen that, although in the field of continuous barley 

 experiments, there was an annual average produce over the three 

 years, of 31 bushels 3f pecks of dressed corn, or 1807 lbs. total 

 corn, there were, after the ten meagre crops of turnips, only 

 18 bushels 3f pecks of dressed, and 1059 lbs. of total corn. Of 

 straw, the average annual yield for the three years was 2065 lbs. 

 in the field of continuous barley, and only 1398 lbs. after the 

 turnips. We have then, less than two-thirds as much corn, and 

 just about two-thirds as much straw, after the ten years' turnips, 

 as in the'field whence much more corn had been recently taken. 

 In fact, a produce of scarcely 19 bushels per acre per annum of 



