Report on the Cultivation of Potatoes. 501 



3 cwt. of mineral superphosphate, and 1 cwt. of potash, per 

 acre, besides a top-dressing^ of 1 cwt. of nitrate of soda, and 

 2 cwt. of superphosphate before earthing up ! 



X. — NoETH OF Scotland. 



Under this heading I have classified two reports, neither of 

 which requires detailed notice, as most of the replies to the 

 questions differ only in points of detail from those received from 

 the Lothian gi-owers. 



The first of these reports has been sent by Lieut. -Col. Ogilvy, 

 but it describes the experience of JNIr. James McGregor, tenant 

 of the farm of Carmichaels, in the parish of Longforgan, Perth- 

 shire, and manager for Lieut. -Col. Ogilvy, who since 1870 has 

 occupied the adjoining farm of Millhill. 



About 25 acres of potatoes have been grown annually, at an 

 interval of 5, 6, or 7 years from the last potato-crop on the same 

 land, according as the seeds in the following course have been 

 left for 1, 2, or 3 years : — oats after grass, potatoes, wheat, 

 turnips, barley, and seeds left for one or more years as just stated. 



The other report is from Mr. T. Yool, of Coulard Bank, Elgin, 

 who grows annually from 100 to 110 acres of potatoes, at an 

 interval of six or seven years, the course being, on clay-loams, the 

 same as that just described, the seeds being left one year only ; on 

 the lighter loams the seeds are left two years and followed by oats, 

 then potatoes, Sec; and on the lightest land the potatoes follow 

 the second-year seeds, oats being omitted from the rotation. 



The following are notes of a special experiment made last year 

 on Col. Ogilvy's farm at Millhill : — 



Notes of Experiments with, Regent Potatoes — Crop 1873, at the Farm of 

 Millhill, Inchture. 



1. Eesult of the examination, on lifting from tlie pit on the 17th December, 

 1873, of the crop of Eegent potatoes grown at Millhill Farm on a drill 110 

 yards in length, and planted in December 1872 with diseased imcut seed 

 9 inches deep; manured with farmyard dung at the rate of 12 tons to the 

 imperial acre: — 



Good 235 lbs. 



Diseased 107 „ 



Total Crop 342 „ 



2. Eesult of the examination, on the same date, of the crop from an 

 adjoining drill of equal length, planted at the same time as Xo. 1 with sound 

 uncut seed, 9 inches deep ; manured with farmyard dung at the rate of 

 12 tons to the imperial acre : — 



Good 267 lbs. 



Diseased 146 „ 



Total Crop 413 „ 



