New York Agricultural Experiment Station. 329 



phate alone or in combination with either nitrate of soda or 

 muriate of potash or both, all in liberal quantities, did not give 

 as good a crop as a soil made of sod composted with one-fourth 

 its bulk of stable manure; but where a very heavy application 

 of raw bone meal was made the yield was 7 per ct. greater than 

 with the compost. The acid phosphate, muriate of potash and 

 nitrate of soda combination gave a yield nearly equal to that on 

 the compost, but with the other applications the yield was much 

 reduced. 



In the next experiment the black loam soil was mixed with an 

 equal bulk of stable manure, and gave a considerably better crop 

 than was secured from the use of raw bone meal alone or com- 

 bined with either nitrate of soda or muriate of potash, but a 

 poorer yield than that from the three fertilizers combined. 



Nine different fertilizers or fertilizer combinations were 

 tested in the next experiment. Manure made up half the bulk 

 of one soil, five-eighths that of another. In the first crop both 

 manured soils gave poorer yields than any other fertilizer or 

 combination; in the second crop, on the unchanged soils, the 

 pots containing one-half manure ranked seventh in yield, those 

 containing five-eighths manure, first. The comparatively slight 

 ditTerences in the higher yields of the previously mentioned ex- 

 periments might be attributed to differences in the kind of plant- 

 food or to variations in vigor of the plants. Some other ex- 

 planation must be given for the great deficiency in yield on the 

 manure pots in the first crop in this test, especially since one of 

 the manured soils without more plant-food gave the largest 

 yield in the second crop. The extremely low yields with manure 

 in the first crop parallel some of our results showing deleterious 

 effect when excessive quantities of manure were used, with 

 superior results from less manure. 



For immediate results nitrate of soda did better than dried 

 blood, but where a second crop was grown without repeating the 

 application of the fertilizers the dried blood gave the better 

 results. 



