FIELD CROPS. 



661 



Each pot contained 9,000 gm. of dry soil, consisting of 90 per cent of sand and 10 per 

 cent of humus clay. A general fertilizer application of 1 gm. each of ammonium 

 sulphate and ammonium nitrate, 2 gm. of double superphosphate, 1 gm. of magne- 

 sium sulphate, and 10 gm. of calcium carbonate was given each pot. 



A series of 6 pots was used for each individual test, and the data given in the table 

 below have reference to an entire series: 



The influence of different potash salts and common salt on potatoes and fodder beets. 



Fertilizers applied per series 

 of pots. 



Potatoes. 



Yield of 



tubers. 



Dry matter. 



Starch. 



Fodder beets. 



"belt* 



No potash 



5.571 gm. KoO as potassium sul- 

 phate 



5.571 gm. K.0 as potassium sul- 

 phate+30 gm. of sodium 

 chlorid 



11.142 gm. KoO as potassium sul- 

 phate 



11.142 gm. K 2 as potassium sul- 

 phate+30 gm. of sodium 

 chlorid 



11.142 gm. KoO as potassium 

 chiorid 



11.142 gm. K.0 as kainit 



11.142 gm. KoO as potassium sili- 

 cate 



11.142 gm. KoO as potassium car- 

 bonate 



11.142 gm. KoO as sugarhouse 

 refuse : 



Gm. 



1285. 7 



2470. 3 



2913. 4 



2630. 6 



3080. 4 



2693. 7 



2524.2 



2530. 5 

 2463.8 



Gm. 



291.7 



594.4 



735.3 



627.4 



774. 8 

 634.6 



593. 7 



581.0 



570.9 



P. ct. 

 22.69 



24. 06 

 25.24 



23.85 



25.15 

 23.56 



23.52 



22.96 



23. 17 



Gm. 



217.2 



451.1 

 566. 4 



596. 1 

 478.4 



447.3 



434.2 



428.0 



P.ct. 

 16. 89 



18.74 



is. 26 

 19. 14 



IS. 05 



19. 35 

 17.76 



17. 72 



17.16 



17.37 



(int. 

 1128.6 



3081.2 

 3105. 6 



4122.6 



3247.8 

 3834.6 



3109.1 



2883.6 

 2497. 5 



Gm. 

 117. 4 



381.8 

 307.1 



439.1 



361.2 



422.6 



394.2 

 344.3 



589.7 



P.ct. 

 10.40 



11.30 



12.39 

 9.89 



10.65 



11.12 



11.02 



12.68 

 11. 94 ■ 

 11.60 



The addition of sodium chlorid to a small application of potassium sulphate 

 slightly increased the yield of potatoes, and with a large application of the sulphate 

 it decidedly decreased the yield. With beets there was an increase of yield, espe- 

 cially with the larger application. 



The dry matter (and starch) in potatoes was decreased by the use of salt, but the 



dry matter of beets was slightly increased by its use. The sodium content of the 



leaves and vines only of potatoes was increased by use of salt, while the general soda 



content of beets was increased. On the other hand, the chlorin content of both 



l 

 leaves and vines and the tubers of potatoes was increased. Kainit gave poorer results 



on potatoes and better results on beets than pure salts. The assimilation of soda and 



chlorin was similar to that observed in case of addition of salt to the pure sulphate. 



The silicate and carbonate of potash and molasses-refuse fertilizer gave poorest 

 results on potatoes. On beets the two former were but slightly inferior to pure sul- 

 phate and chlorid, while the molasses-refuse fertilizer gave poorer results. 



Report on tests of varieties of potatoes, R. S. Seton ( Yorkshire Col., Leeds, and 

 Eart and West Ridings Joint Agr. Council [Pamphlet'] 35, 1902-3, pp. 13). — It is con- 

 cluded from the results that Up-to-date, British Queen, Scottish Triumph, General 

 Roberts, Charles Fidlder, Conquest, Challenge, and British Lion are reliable varieties. 

 Sets yielded as good crops as whole seed. Liming the cut surface of sets is recom- 

 mended when these can not be planted immediately. 



A comparison of crops from seed of 4 varieties grown atGarforth for 3 years,. and of 

 seed of the same varieties procured this season from the same original source, showed 

 a marked increase in favor of the new seed, and it is suggested that the same stock 

 should not be used on the same farm for more than 3 years. The crop from the new 

 seed was also free from diseased tubers, while in the crop from the old seed the per- 

 centage of diseased tubers ranged from 13.82 to 33.19. 



