Nbw York Agricultural Experiment Station. 341 



stable manure gives distinct advantages for forcing crops aside 

 from the available plant-food which is thereby added to the soil. 

 In this crop the yield, as a rule, increased vv^ith each increase of 

 manure, although not to a corresponding degree. With succeed- 

 ing crops the yield, where the larger amounts of manure were 

 used, oftentimes was less than that obtained with smaller 

 amounts, as we shall see later. The soils which received manure 

 only, at the rate of one-third their bulk, and which were packed 

 firmly into the boxes, gave a better yield than any other por- 

 tions; better even than those which received as much or more 

 manure combined with commercial fertilizers. Less increase 

 was seen with the corresponding loose soil, but even in this 

 case the yield on the sandy loam exceeded that where more 

 manure was used in combination with commercial fertilizers, 

 and on the clay loam it exceeded that obtained with an approxi- 

 mately equal amount of manure combined with the commercial 

 fertilizers. 



The relative value of the different forms of the nitrogenous 

 commercial fertilizers shown on the soils where no manure was 

 used did not hold good when these fertilizers were combined 

 with the stable manure. The addition of even 5 per ct. by weight 

 (11|^ per ct. by bulk) of the manure obscured the individual action 

 of the nitrogenous commercial fertilizers. Those who wish to 

 follow the results in this line more fully are referred to the data 

 set forth in Tables V to IX. 



Where manure was used the crop on the sandy loam was very 

 much below that obtained with similar treatment on the clay 

 loam. The soils which received no manure show an interesting 

 exception to this with this croj) but not with succeeding crops. 

 See Tables V to IX. 



SEASON OP 1899-1900. 



The experiments in 1899-1900 were conducted on the same 

 general plan as those of the preceding year. The few changes 

 mentioned below were introduced. The same soil was used. It 

 was prepared by dumping the box, adding to the soil the stable 

 manure or commercial fertilizer, if any was required, and after 



