158 Further Experiments on the Cultivation of Potatoes, 



Time of planting. 



Sets. 



Weight planted. 



, Deduct weight 

 Weight taken up. 'planted for clear 

 jproduce. 



1st week in March. -| 

 f 



1st week in April. \ 





T Cwt. lbs. 





Whole Tubers 

 Base of Tubers 

 Points of Tubers. 



1 11 22 

 1 0 89 

 0 10 44 



15 2 45 

 15 6 108 

 18 1 28 



13 11 23 



14 6 19 

 17 10 96 



Aver. 



1 0 89 



16 3 60£ 15 2 83£ 



Whole Tubers 

 Base of Tubers 

 Points of Tubers 



1 11 22 

 1 0 89 

 0 10 44 



15 14 74 

 14 11 18 

 14 8 74 



14 3 52 

 13 10 41 

 13 18 30 





1 0 89 



14 18 18 



13 17 41 



Difference in 



favour of the March plantation 



1 5 4£J 



It appears from the above, that the March plantation exceeds 

 that of April by 1 ton 5 cwt. 42y lbs. ; and farther, that the average 

 produce of the points of tubers exceeds that of whole tubers by 

 1 ton 16 cwt. 87 lbs., and of the base of tubers by 1 ton 15 cwt. 94£ 

 lbs. Consequently, the lowest produce is from the whole sets ; a 

 little above the latter is that from the base ; and the points of 

 the tubers rank considerably above either. This superiority appears 

 to take place in the March planting ; for of those planted in April 

 the whole tubers had the advantage with regard to produce. 



Sir George S. Mackenzie obtained a different result from 

 different parts of the tuber. Cuts from the base gave a return of 

 26 lbs. middle 20^ lbs. and points 24 lbs. ; but, from the following 

 communication, it appears that he was not fully satisfied in regard 

 to the experiment having been fairly made. 



" The experiment, the result of which I communicated last year, 

 comparing the respective produce of the cuts taken from the root 

 end, the middle, and the rose end of a Potatoe, was made, as I men- 

 tioned, by the gardener then in my service. Last spring I directed 

 the experiment to be repeated ; but my gardener misunderstand- 



