Influence of Manures on Yield of Timothy Hay. 



271 



was 1.3 degrees below normal. It thus appears that the season of 1906 

 was the most favorable of the three for timothy, that 1907 was somewhat 

 less so and 1905 the least favorable. 



While it is true that during the favorable seasons the total yield of hay 

 and also the apparent increase due to fertilizers is greater than in the 

 unfavorable season, it does not follow that the percentage increase due to 

 fertilizers is also greater, as is shown in Table VI. On the contrary, 

 it is a very interesting fact that when the fertilizing materials were added 

 singly, the percentage increase due to this application gradually decreases 

 with but one exception, from year to year. When the fertilizers were 

 added in combinations of two, the same tendency is present, though not 

 so markedly, while the complete fertilizer showed very strongly the 

 opposite tendency. Tables VI and VII bring out this fact. 



TABLE VI 



Table Showing Percentage Increase in Yield of Timothy Hay Due to the 

 Various Fertilizing Elements for the Years 1905, 1906, 1907 



Elements Applied 



Percent- 

 age 

 of 

 Increase 

 1005 



Percent- 

 age 

 of 

 Increase 

 1Q06 



Percent- 

 age 

 of 



Increase 

 1007 



Nitrogen 



Phosphorus 



Potassium 



Nitrogen and phosphorus 



Nitrogen and potassium 



Phosphorus and potassium • 



Nitrogen, phosphorus and potassium 



Nitrogen, phosphorus doubled and potassium 



Nitrogen doubled, phosphorus doubled and potassium 



Nitrogen doubled, phosphorus and potassium 



Nitroger doubled, phosphorus and potassium 



Nitroge 1 quadrupled, phosphorus and potassium .... 



52 

 29 



43 

 69 



79 

 22 



■ o 

 69.2 



47.1 



107-3 

 165.6 



123.3 

 41 .1 



44-5 

 12.8 



29 



57 

 67 



49 



83 

 69 



143 

 130 



137 

 172 



19 

 23 

 19 



33 

 61 



30 

 103 



99 



133 

 139 

 146 

 197 



TABLE VII 



Giving Average Percentage Increase for the Fertilizing Elements Added 

 Singly, in Combinations of Two, and in Combinations of Three, for the 

 Years 1905, 1906, 1907 



Method of Application 



Fertilizers added singly 



Fertilizers added in combinations of two 

 Complete fertilizer 



Average 

 Percent- 

 age of 

 Increase 

 lOOS 



41.8 

 57-2 

 92 . 2 



Average 

 Percent- 

 age of 

 Increase 

 1006 



28.9 



58.3 

 122.7 



Average 

 Percent- 

 age of 

 Increase 

 1907 



20 .9 



42. I 



1363 



