352 EXPERIMENT STATION RECORD. 



The results with different manures were again in favor of bone meal and Si Itpeter. 

 Where the different fertilizers were applied in quantities furnishing 50 lbs. of nitro- 

 gen per acre, the net profit was not very high. Green manuring with jute and sun 

 hemp i ( 'rotatoria juncea I produced larger yield* than the application of 50 maunds of 



cow manure. Paddy sown at the rate of 30 lbs. per acre yielded 3,030 lbs. of grain 

 and 6,254 lbs. of straw: while a sow ing at the rate of tit' 11 is. per acre yielded 2,983 lbs. 

 of grain and 8,129 lbs. of straw. Among 6 varieties of paddy from different sources 

 Sukhavel and Kamode, both Bombay varieties, gave the most promising results. 



The results with potatoes show that castor cake applied alone gave the largest 

 yield. Rape cake and saltpeter gave a larger yield than rape cake alone. From the 

 data obtained saltpeter is regarded as an unsuitable fertilizer for potatoes. The only 

 profitable applications were farm-pitted cow manure, castor cake, and castor cake and 

 saltpeter. Green manuring either with or without other fertilizers was also profit- 

 able. "Whole tubers gave a better yield than cuttings. Five varieties varied in yield 

 from 8,820 lbs. to 21,156 lbs. per acre. Patna stood first in yield and profit. 



The Woburn field experiments, 1902, J. A. Voelcker (Jour. Roy. Agr. Sue. 

 England, 64 (1903), pp. 328-347, Jigs. 4)- — These experiments are in continuation of 

 previously reported work (E. S. R., 15, p. 765). 



The results with growing wheat and barley continuously under different annual 

 fertilizer treatment are tabulated and discussed. The fertilizers used in this con- 

 nection were ammonia salts, or equal quantities of sulphate of ammonia and muriate 

 of ammonia containing 50 lbs. of ammonia; nitrate of soda furnishing as much nitro- 

 gen as 50 lbs. of ammonia; and mixed minerals consisting of 3.5 cwt. of superphos- 

 phate of lime, 200 lbs. of sulphate of potash, 100 lbs. of sulphate of soda, and 100 lbs. 

 of sulphate of magnesia per acre. Rape cake was applied in quantities furnishing 

 50 or 100 lbs. of ammonia, and barnyard manure in quantities furnishing 200 lbs. of 

 ammonia per acre. 



In the tests with wheat this year nitrate of soda applied alone gave 25 bu. per 

 acre, or 1.5 bu. more than the average, and where mixed minerals were given with 

 it, 35.8 bu. per acre were obtained; but doubling the quantity of the nitrate in this 

 combination gave a smaller yield. Ammonia salts gave much less satisfactory results 

 than nitrate of soda, but the plat which had received lime at the rate of 2 tons per 

 acre in 1897, yielded 8 bu. more than the plat which this season had received 

 ammonia salts alone. The nitrate of soda plat also gave better results than ammonia 

 salts and minerals, and ammonia salts doubled in quantity. Barnyard manure gave 

 the best yield, 39.4 bu. per acre, being followed by the larger application of rape 

 cake with 37.5 bu. 



Hallett Pedigree barley was grown this season in these fertilizer tests. Ammonia 

 salts without lime gave low yields, less than 1 bu. per acre being obtained when 

 used alone. With the addition of lime applied in 1897, the yield was 29.6 bu. ; while 

 with mineral manures they gave a yield of 51.4 bu. per acre. The highest returns, 

 53.4 bu. per acre, were obtained from the plat receiving minerals annually and a 

 double quantity of ammonia salts every other year, including 1902. The barnyard 

 manure plat yielded 49.8 bu. and the heavily fertilized rape-cake plat, 48.3 bu. per 

 acre. 



In rotation experiments a fourth successive barley crop grown without manure 

 yielded at the rate of from 16 to 32.1 bu. per acre. The rotation test in progress on 

 Lansome Field resulted in the best yield of barley on the plats receiving decorticated 

 cotton cake as a top dressing. The use of maize meal remained without effect. 

 Mustard, rape, and tares were grown on this same held for green manuring. One- 

 half of each plat was fertilized at the rate of 3 cwt. of superphosphate and 2 cwt. of 

 kainit per acre. 



Mustard made a much better growth than the other crops, and the results for 6 

 vears show that the mustard has been a more effective green manure than the tares. 



