1921.] 



Report on Potato Trials, 1920. 



B57 



Scott and King George, the best second earlies ; and Kerr's Pink, 

 Timvald Perfection and Majestic are the best maincrop or late 

 varieties. 



On examining the average yields on light, medium and heavy 

 soils for the whole Country, the following conclusions are 

 indicated : — 



(a) Early Varieties. — In the case of first earlies, the variety 

 Eyicure maintains its accredited position as the heaviest cropping 

 early variety. It is only surpassed by Kerfs Pink when in 

 competition on light soils with second earUes, maincrop and late 

 varieties. On heavy soils it still retains first place, and apart 

 from the fact that it is a susceptible variety, it shows great power 

 of adaptability. Duke of York has cropped heavier than the 

 immune varieties, and appears to be at its best on a medium 

 soil. Xinetyfold also crops heavier on all soils than the early 

 immunes. Snowdroj) is the heaviest cropper amongst the im- 

 munes on light and heavy soils. Dargill Early takes the third 

 place amongst the immunes on Hght soils, the first place on 

 medium soils, and second place on heavy soils. A rran Rose takes 

 second place amongst early immunes on light soils, second place 

 on medium soils and third place on heavy soils. 



(b) Second Earlies. — Amongst second earUes Great Scott holds 

 the premier position, being the heaviest average cropper on light 

 and medium soils, and only falls to the second place on heavy 

 soils. King George takes the second place on light and medium 

 soils and third place on heavy soils. Arran Comrade takes first 

 place on heavy soils, with the very creditable average of 10 tons 

 10 cwt. per acre. It would appear to be the most suitable im- 

 mune second early for a heavy soil, although Great Scott and 

 King George closely follow it. 



(c) Main Crop and Late Varieties. — Amongst these K^?^r^s Pink 

 clearly demonstrates its superiority as a cropper and is on an 

 average 1 ton 17 cwt. per acre ahead of all varieties on the three 

 types of soil. It is of interest to note that this variety with a 

 long season of growth gives the heaviest average on light soils. 

 Tinirald Perfection takes second place on light and heavy soils 

 but is beaten by Majestic on medium soils. Golden Wonder 

 takes fourth place on all three types of soil. Faronrite has done 

 badly and has cjiven the poorest results of any of the immunes. 



Characteristics. — The addition of a section giving tlie 

 characteristics of the varieties tested would increase the value 

 of the report but would occupy too much space. Such informa- 

 tion is given in the Supplement of the Joi rnal on the Cultiva- 

 tion. Composition and Diseases of the Potato, price Gd. 



