46 MASS. EXPERIMENT STATION BULLETIN 293 



The results show marked differences in the jiipe tobaccos but a reasonable uni- 

 formity in the cigarette tobaccos. 



Oil Sprays. (E. B. Holland.) Miscibles were prepared from five different 

 lubricating cils ranging from spindle oils to a medium turbine. The process 

 employed was the so-called spontaneous method using triethanolamine oleate as 

 the emulsifying agent. The miscibles were applied in the orchard on the basis 

 of 3 per cent oil by weight and gave satisfactory control of mites (index) in all cases 

 with no apparent injury to buds or retardation of growth. The heavier, more 

 viscous oils required a larger amount of emulsifying agent at an increased cost 

 and were no more effective. 



Nitrogen Fixation in the Presence of or as a Result of the Growth of 

 Legumes versus Non-Legumes Under Certain Defined Agronomic Con- 

 ditions. (E. W. Morse.) The crops grown this year (1932) were Hungarian 

 millet and soy beans as non-legume and legume. Nitrogen was applied this year 

 to Plots 5, 8, and 10, while Plots 7 and 9 were continued without any as in the past 

 50 years. This was the ninth crop since the beginning of this e.xperiment, during 

 which period Plot 6 has not received nitrogen while in previous years it had been 

 dressed witii ammonium sulfate like Plot 8. 



Dry Matter and Nitrogen Removed from Non-Legume and Legume Areas in 1932 



(Pounds per acre) 



Without Nitrogen With Nitrogen 



Dry Matter Nitrogen Dry Matter Nitrogen 



Hungarian Millet 3464 28.24 5385 52.78 



Soy Beans 4029 104.77 4377 99.43 



The non-leguminous millet responded to the nitrogen fertilizer with an increase 

 of 1921 pounds of dry matter, equivalent to 2260 pounds millet hay per acre. 

 The gain in nitrogen was 24.5 pounds, which is only 55 per cent of the 45 pounds 

 applied per acre. 



The leguminous soy beans gained 348 pounds of dry matter when nitrogen 

 was applied, but the crop contained less nitrogen than that grown without any 

 nitrogen in the fertilizer. The failure to take up nitrogen from the fertilizer 

 has been observed in previous seasons with clover. 



A summary of the nine crops grown on the legume sections of all the plots is 

 here presented for each year of the experiment. 



Dry Matter and Nitrogen removed from Legume Areas in 9 Years 

 (Pounds per acre) 



Without Nitrogen With Nitrogen 



Year Crops Dry Matter Nitrogen Dry Matter Nitrogen 



1924 Clovers 3865 106.1 *3916 100.6 



1925 Corn 3419 59.4 3422 58.5 



1926 Soy Beans .3491 79.6 *3681 87.9 



1927 Corn 2366 ^9A 2353 40.9 



1928 Clover and Weeds 2658 39.0 *2828 38.7 



1929 Clover 3952 91.6 3624 81.3 



1930 Millet 6187 78.9 *6920 89.5 



1931 Peas and Oats 2510 44 6 2579 46.8 



1932 Soy Beans 4029 104.8 *4377 99.4 



Total 32477 643.4 33700 643.8 



♦Nitrogen applied in each of these years at the rate of 45 pounds per acre. 



