William Weir 

 Table III. Weights of first crop, Wheat. 



249 



After the wheat was cut the soils were thrown out of the pots, mixed 

 up afresh and replaced as before. Mustard was then sown (still in 

 August), during rather dry weather, and was grown in the open. Only 

 on Harpenden Field Soil was any appreciable yield obtained : on the 

 extracted soil the plants scarcely grew beyond the seed-leaf stage. On 

 both allotment soils the crops were poor. The mustard was pulled on 

 October 8th and dried and weighed as before. 



Table IV. Weights of second crop, Mustard. 



Table V. Weights of third crop. Rye. 



The soils were then cultivated but iiot otherwise disturbed. On 

 October 13th all the pots were sown with rye, which grew in the glass- 

 house till 18th February, 1915, when the plants, 10 to each pot, were 



