Abstract of United States Experiment Station Food f 



Record. Plant8 



27 



From Massachusetts Station Report, 1905. 



Mixed oats and peas were grown this year in connection 

 with comparative tests of different sources of Nitrogen, and 

 on the basis of yields secured the materials ranked as fol- 

 lows: Nitrate of Soda, dried blood, sulphate of ammonia, 

 and barnyard manure. Based on the increase of all the crops 

 since the beginning of the experiments the relative rank was : 

 Nitrate of Soda 100, dried blood 68.72, sulphate of am- 

 monia 60.78, barnyard manure 80.58. 



On the grass lands receiving different fertilizer treat- 

 ment in rotation the average yield of hay was at the rate of 

 4,840 Ibs. per acre for all 3 systems of manuring. The aver- 

 age yield in this test from 1893 to 1905, inclusive, was 6,479 

 Ibs. An application of Nitrate of Soda, after harvesting the 

 first crop of grass, gave but a relatively small increase in 

 yield, but, in one instance, where applied at the rate of 150 

 Ibs. per acre an increase of nearly I ton of rowen, or consid- 

 erably more than sufficient to pay the cost of the fertilizer 

 was obtained. The results in determining the relative value 

 for garden crops with fertilizers supplying respectively Nitro- 

 gen and potash, when used with manure, show that on the 

 basis of total crops produced the standing of the different 

 Nitrogen fertilizers is, for the early crops, Nitrate of Soda 

 100, dried blood 95.67, sulphate of ammonia 63.08, and for 

 late crops Nitrate of Soda 100, dried blood 98.77, sulphate 

 of ammonia 79.52. For 15 years the relative standing of the 

 fertilizers supplying potash is, for early crops, sulphate of 

 potash 100, muriate of potash 94.66, and for late crops sul- 

 phate of potash 97.09, and muriate of potash 100. 



From United States Experiment Station Record, 

 November, 1906. 



The results of plat experiments with wheat here re- 

 ported indicate that the Nitrate alone in 2 applications was 

 more effective than a mixture of Nitrate of Soda and sulphate 

 of ammonia. 



