The Woburn Field Experiments, 1914. 293 



malting standard, though the dearness of foreign barleys gave 

 to them a value higher than that which they would have 

 ordinarily obtained. The lowest quality was obtained, as 

 usual, with the plots to which nitrate of soda had been given, 

 notably 3a, ob, 9a, 9b. Between the other lots there was little 

 or nothing to choose. 



Rotation Experiments. — The Unexhausted Manurial 

 Value of Corn and Cake {Stackyard Field). 



(a) Series G. 1910, Sivedes^fed on by Sheep with Corn and 



Cake respectively ; 1911, Barley ; 1912, Green Crops ; 1913, 



Wheat; 1914, Sivedes. 



Subsequent to the removal of the wheat crop of 1913, the 

 land was ploughed and left until spring. On May 21, 1914, it 

 was sown with 3 cwt. per acre of superphosphate and 1 cwt. 

 per acre of sulphate of potash. Swede (" Invicta ") seed was 

 sown at the rate of 6 lb. per acre on May 30. The crop came 

 up fairly and was singled July 'o-'\%. During the summer 

 drought the roots suffered very greatly and needed rain very 

 much. " Finger and toe " also made its appearance to some 

 extent. By keeping the land constantly stirred, it was found 

 possible to just keep the roots "going,"' though the crop 

 obtained was necessarily a small one. The weights are given 

 in Table III. 



Table III. — Rotation Experiment. Series G (Stackyard 



Field). 



Produce of Swedes, 1914, after Wheat. 



The produce, as was expected, was but small, with practically 

 no difference showing between the two plots. Before beginning 

 another rotation it will be necessary to cart on swedes from 

 another field to make up the 12 tons per acre usually fed on 

 the land before putting in the spring crop of barley. 



The first rotation course of the new series being now con- 

 cluded, it will be well to review the results of the past four 

 years and see what differences, if any, have been brought out 



