JOURNAL OF THE ROYAL BORTICULTURAL SOCIETY. 



2. New York and New Jersey formula v. Neiv Hampshire formula. — 

 The New York and New Jersey mixture produced a slightly heavier crop' 

 but at an increased cost, which practically did away with this advantage. 



The two recipes were as follows : — 



New York Mixture. 

 Nitrogen 8*9 per cent., 150 lb. nitrate of soda, 180 lb. sulphate of 

 ammonia. 



Phosphoric acid 8 per cent., 750 lb. bone black. 



Potash 10 per cent., 300 lb. muriate potash, 120 lb. makeweight. 



New Hampshire Mixture. 



Nitrogen 3 per cent., 150 lb. nitrate of soda, 112| lb. sulphate of 

 ammonia. 



Phosphoric acid 0 per cent., 565^ lb. bone black. 



Potash 10 per cent., 300 lb. muriate potash, 375 lb. makeweight. 



8. Anion nl of potash to use per acre. — Taking cost into consideration, 

 10 per cent., or 300 lb. muriate of potash per acre, gives the best results. 



4. All fertiliser in hill v. one-half in hill and one-half broadcast.- 

 The plot with all the fertiliser placed in the hill produced the largest crop 

 of marketable potatoes. 



5. With v. without farmyard manure. — The best results were obtained 

 by using 15 cords of farmyard manure and 750 lb. commercial fertiliser 

 per acre, and the advantage to the succeeding crop must also not be 

 forgotten in estimating the. value of the extra dressing. 



6. Ploughing v. harrowing in farmyard manure. — The plots ploughed 

 in bore 15 bushels per acre of marketable potatoes more than the average 

 of the others. 



7. Commercial fertiliser above v. below seed. — -Whether farmyard 

 manure is used or not, it is of equal importance that the chemical fertiliser 

 should be placed above the seed. 



8. Description of varieties. — ; Delaware ' as a main crop and ' White 

 Rose ' as an early potato are most highly recommended. 



9. Variety test. — ' Delaware ' gave the largest crop of the fifty-five 

 varieties tested. 



10. Modern culture. — The ideal potato soil is deep, friable, retentive 

 of moisture, and well drained. One hundred bushels of potatoes contain 

 about 12*6 lb. nitrogen, 4*5 lb. phosphoric acid, and 30 lb. potash. 

 Remembering this, a study of the nature of his own soil should enable 

 each grower to apply, at the lowest possible cost, the proper amount of 

 plant food required to produce a full crop. 



American growers are advised to plant standard and well- tested 

 varieties, and to leave the experiment stations to make trials of the new 

 sorts which are offered at fancy prices by seedsmen. 



Blight may be prevented by spraying with Bordeaux mixture. 



To destroy the potato beetle, add J to \ lb. Paris green to each 

 50 gallons of mixture. To prevent scab, avoid infected seed or tubers and 

 excess of stable manure. If infected stock is used, treat with formalin or 

 corrosive sublimate before planting. — M. L. H. 



