II Sept., 1911.] Potato Experimental Fields. 1910-11, 



631 



During the growing period this plot was most promising in appearance, 

 showing the effect of the manures in a marked manner, but the results are 

 the most unsatisfactory and disappointing of the whole series. It will be 

 noted that the \arieties har\ested showed a very high percentage of diseased 

 tubers, ranging up to 64 per cent. I'nder such conditions, no value can be 

 attached to the action of the manun^ on the vield of the different sections. 



CoLAC Plot. 

 'J'his j)lol was planted on Messrs. J. and D. Rankin's farm, " The 

 Hill,'' on the 8th and 9th November. The soil was a rich volcanic. A 

 crop of barley had been harxested the pre^•ious year, and consequently the 

 land was in very good tilth. The \'arieties comprised New Zealand Pink- 

 eye, Sutton's Abundance, Adirondak. Brown's River. Orr's Wonder. Green 

 Mountain. Up-tri-Datt- and six seedling varieties raised bv Mr. Rvan of 

 Millbrook. 



III. — CoLAC Plot. 



Variftv. 



Black Prince 



New Zealand Pinkey( 



Rvan's Seedling (27) 

 |24) 

 (16) 

 (11) 

 (9) 

 (3) 



Sutton's Abundance 



Adiriindak 



Brown's River . . 



Orr's Wonder 



(Jreen Mountain 



Ip-to-Date 



Av. 



Sections. 



/ iHproi'cuniit of type of .vVrr ZcaUnid Pinheye. — This work was again 

 canird dut on the ("ol.ic plot. Thr following tal)le shows the re.sult : — 



From the alx)ve, it will bo .sotii tliat there is a very slight difference in 

 the percentage in favour of full < rowns over the deep crowns. Further, 

 it will !)(' noted that the ])cn'('ntage of the undesirable class is much larger 

 than an\ pn-vious (K'casion, and conilnns the opinion that this is largely 

 iliu- to weather conditions. 



rrcatmenr for Scab. -To test the cfl'ect of dipping seed potatoes f<'>r 

 ."^cab. a parcel of vt-ry scabl)y New Zealand Pinkeye seed was dipped in a 

 bath of i)luestone .solution (i lb. liluestone t<i lo gallons of water) for half 

 an hour. Owing to tin- attack of Blight it was difficult to obtain accurate 

 results, but from Table ^'. thev ap]VMr i<i b.' sli^hiU in f,i\onr of the 

 treated seed. 



