TULIP-ROOT. 103 



Holmes, Uphall, Linlithgow, N. B., on June 15th, 1888, 

 shows that at that date " The unmanurecl land was giving the 

 most unhealthy crop ; that with steamed bone-flour came 

 next ; the plot treated with sulphate of ammonia had a 

 number of unhealthy plants, but was better than what was 

 unmanured ; and of the two others, both were doing very well 

 on the whole, but that treated with the mixture of sulphates 

 and phosphates was better than that treated with sulphate of 

 potash alone. 



" No. 1. Steamed Bone-flour, 3 cwt. ^Kr acre, got very 

 yellow for a while, but has now taken on a growth ; a number 

 of unhealthy plants on this plot. 



" No. 2. Sulphate of Potash, 55 j^er cent., 3 cwt. per acre, 

 was always fresh and green, and not an unhealthy plant on 

 the whole plot ; it is now, however, losing growth a little. 



" No. 3. No manure, has always been the worst, having a 

 great number of unheathy plants, and a sickly yellow appear- 

 ance. It is now mending a bit. 



"No. 4. Sulphate of Ammonia 1| cwt. per acre, has also a 

 number of unhealthy plants, though not so bad as No. 3. It 

 has now taken on a luxuriant growth. 



"No. 5. Mixture" (consisted of about 2 parts of sulphate 

 of potash, 55 per cent. ; 3 parts of sulphate of ammonia, 

 25 per cent. ; and 4 parts of phosphates, 48 per cent.) " has 

 been similar to No. 2 all spring, perhaps not quite so dark a 

 green. Plants healthy, with few exceptions. Gives promise 

 of being the largest crop of any of the plots." 



In experiments carried on in the preceding year, 1887, by 

 the same observer, the application of | cwt. of sulphate of 

 potash per acre, in addition to superphosphate and ammonia, 

 is noted as so marked, that the supply having run short 

 before the field was finished, the part that received the potash 

 grew on most luxuriantly, but the rest threatened to be a com- 

 plete failure. 



Nitrate of soda, at the rate of 1 cwt. per acre, is noted as 

 doing 7io (/oocZ, and after a fortnight of "growing weather," 

 bringing no improvement. Sulphate of potash, at the rate 

 of about g- cwt. per acre, brought good growth and a heavy 

 crop harvested. 



Dr. Kuhn concludes his valuable pamphlet, previously 

 quoted from (at p. 101), with the following summary : — 

 " Deep cultivation, rich manure, but with care not to use 

 wormlet-infested stable manure, and suitable rotation of crop, 

 are the best methods of combatting the evil ; their applica- 

 tion consistently carried out will be certain to succeed iu 

 time." 



