June 1941] Agricultural Research in New Hampshire 23 



the project was shifted to a different farm in 1940 and the design of the 

 experiment changed somewhat. The yield variations on plots treat- 

 ed in different ways in 1940 were slight, especially on those where 

 only the fertilizer formula was varied. This may be partly accounted 

 for by a relatively unfavorable growing season in the area. It is 

 perhaps of some significance that yields were highest in all cases 

 where the fertilizer was drilled, while yields were lowest for those 

 when the fertilizer was applied broadcast. However, inasmuch as 

 this is the first year of the experiment in its present form, not a great 

 deal of weight can be placed upon the results. 



(Purnell Fund) 



A Fertilizer Experiment with Dairy Farm Crops in the Connecticut 

 Valley (F. S. Prince, P. T. Blood, G. P. Percival, P. N. Scrip- 

 ture) 



The plots upon which this experiment has been conducted are 

 located on the Livingston farm at Claremont, New Hampshire. Since 

 the beginning of the project in 1930, no changes have been made in 

 the fertilizer treatment, although a variety of crops have been 

 grown on the plots. 



The fields were seeded to hay in 1937, and the 1938 crop showed 

 a fairly uniform stand of clover. However, by 1939 the clover had 

 disappeared from all plots except those which received potash. The 

 clover persisted on the potash-treated plots in 1940, making up about 

 40 per cent of the stand. Grass also grew better on the latter plots, 

 these plots being the only ones on which a second cutting was possi- 

 ble in 1940. 



The yields of hay obtained in 1940 and the average yields for 

 the past three years indicate that neither lime nor phosphorus alone 

 stimulated hay yields, whereas potash alone in 1940 showed a gain 

 of 1862 pounds over the check plots. Phosphorus used in conjunction 

 with potash gave much greater gains than could be attributed to pot- 

 ash alone. The same thing appears to be true when lime is combined 

 with potash, as is shown in the data presented below. 



LIVINGSTON FARM HAY YIELDS, 1940 AND 1938-40 



Pounds of Cured Hay Per Acre 



3-Year Average Yield 



2682 

 2611 

 2646 

 4527 

 4911 

 7496 

 8016 

 8117 



{Purnell Fund) 



