AND NlTKOtiEN ON THE GKOWTII OF TUKXir.S. 



07 



change was more marked by 1st October ; but, otherwise, tliere 

 was little alteration in the appearance of the relative positions 

 the plots occnijied a month earlier. Owing to blanks in some of 

 the plots, I could not well give a fair comparison by pulling and 

 weighing the whole plot, and the thin spots of soil, predominat- 

 ing more in some plots than others, would liave also been 

 against a fair average. I therefore chose a portion of the 

 three central drills of each plot, apparently grown on average 

 soil, extending collectively to the length of one whole drill of a 

 l)lot, or the j-^,,th part of an acre; by doing so I was enabled 

 to till up any blank in tlie piece weighed by an average turnip 

 out of the adjoining drill. I then got rid of any extra thin or 

 deep pieces of soil, and also avoided weighing any of the outside 

 drills, where the manures of the neighbouring plots may have 

 been slightly overlapped. I procured the assistance of one or 

 two practical gentlemen, and we bestowed the greatest attention 

 on the selection of the pieces weighed, and also in the shawing 

 and weighing of tlie roots and shaws. The subjoined table 

 si lows the weights of the various plots immediately after being 

 pulled. 



