172 THE POTATO 



verted by deep trenching. Any crop except pota- 

 toes may be grown. 



"Whichever of these methods may be adopted 

 it is desirable, when potatoes are next planted in 

 the garden, that the sets should be dusted over 

 with sulphur, and as they lie in the drills should be 

 freely sprinkled with sulphur before they are cov- 

 ered in. Before the potatoes are earthed up, the 

 surface of the soil round the haulms should be 

 sprinkled with sulphur. 



"Gardens in which even a single diseased potato 

 has been found, the course recommended in the 

 foregoing paragraphs should be adopted; but if no 

 other land for growing potatoes is procurable, and 

 occupiers of gardens and allotments are obliged to 

 grow potatoes on land on which disease has been 

 seen, they should apply gas-lime in autumn or 

 early winter at the rate of three pounds to 'the 

 square yard. After the sets have been placed 

 in the drills they should be freely sprinkled with 

 sulphur. Before the plants are ' earthed up' the 

 ground should again be sprinkled with sulphur. 



"Some varieties of potatoes are not affected by 

 wart disease, or are very slightly affected. The 

 varieties known as * Snowdrop, ' ' Conquest, ' 'Abun- 

 dance/ 'Langworthy,' "What's Wanted/ and 

 'Golden Wonder,' have escaped infection, when 

 such other sorts as * Up-to-date, ' ' Northern Star, ' 

 'British Queen,' 'Royal Kidney,' 'King Edward 

 VII.,' 'Epicure,' 'Express,' 'Ninety-fold,' and 

 'May Queen,' planted in the same soil have been 

 severely attacked. Early potatoes often escape 

 attack the first two or three years, i. e., until the 

 soil gets badly infected. 



"If an early potato be required 'Snowdrop' or 

 'Conquest' should be planted; if a late variety, 



