SOIL NITROGEN 7 



Tabie 3. — Yields of Dry Matter and Nitrogen — Pounds Per Acre. 



Witholt Nitrogen 



Year 



Legume Subplots 



Nonlegume Subplots 



Crop 



Dry Nitrogen 

 Matter 



Crop 



Dry Njtrogen 

 Matter 



Plot 6. No Nitrogen 



1924 Clover 2,800 



1924 Clover rowen 1,260 



1925 Sweet corn 3,120 



1926 Soybeans 3,660 



1927 Sweet corn 2,140 



1928 Clover 2,480 



1929 Clover 4,040 



1930 Japanese millet 7,480 



1931 Oats and peas 2,340 



1932 Soybeans 3,660 



1933 Alfalfa Plowed 



1934 Hungarian millet. . . . 3,680 



1935 Oats and peas 3,660 



73.4 

 39.4 

 59.2 

 73.6 

 37.8 

 36.2 

 90.6 

 91.0 

 42.4 

 96.8 

 under 

 31.2 

 64.8 



Total 40,320 736.4 



Grass 2,120 15.2 



No rowen .... 



Sweet corn 1,860 27.2 



Japanese millet 10,220 83 . 4 



Sweet corn 2,500 43.8 



Grass 3,300 30.6 



Grass 1,400 12.8 



Japanese millet 6,840 66.0 



Oats 1,940 25.0 



Hungarian millet . . . 3,260 26 . 



Barley Plowed under 



Hungarian millet 3,760 32.4 



Oats 2,340 23 . 



Total 39,540 385.4 



Plot 7. No Nitrogen 



1924 Clover 1,900 50.0 



1924 Clover rowen 1,440 43.2 



1925 Sweet corn 3,240 53.0 



1926 Soybeans 3,300 77.0 



1927 Sweet corn 2,380 39.2 



1928 Clover 2,820 42.2 



1929 Clover 3,740 90.6 



1930 Japanese millet 5,520 65.6 



1931 Oats and peas 2,520 44.8 



1932 Soybeans 4,080 107 . 2 



1933 Alfalfa ". . Plowed under 



1934 Hungarian millet 4,180 37.6 



1935 Oats and peas 3,520 65.0 



Total 38,640 715 4 



Grass.. 890 



No rowen 



Sweet corn 2,020 



Japanese millet 4,840 



Sweet corn 2,420 



Grass 3,320 



Grass 1,100 



Japanese millet 6,860 



Oats 2,080 



Hungarian millet. . . . 3,360 



Barley Plowed 



Hungarian millet .... 3,760 



Oats 2,240 



7.4 



28.2 

 36.0 

 41.0 

 29.6 

 10.8 

 77.4 

 27.0 

 26.2 

 under 

 32.0 

 25.0 



Total 32,890 340.6 



Plot 9. No Nitrogen 



1924 Clover 2,580 63.8 



1924 Clover rowen 1,480 44 . 6 



1925 Sweet corn 3,880 65.6 



1926 Soybeans 3,500 87.6 



1927 Sweet corn 2,560 40.6 



1928 Clover 3,160 44.8 



1929 Clover 4,080 92.4 



1930 Japanese millet 5,560 71.2 



1931 Oats and peas 2,680 46.8 



1932 Soybeans 4,340 110.2 



1933 Alfalfa Plowed under 



1934 Hungarian millet 4,440 39.0 



1935 Oats and peas 3,220 66.8 



Total 41,480 773.4 



Grass 1,080 



No rowen 



Sweet corn 2,220 



Japanese millet 4,680 



Sweet corn 2,840 



Grass 3,420 



Grass 1,360 



Japanese millet 6,740 



Oats 2,140 



Hungarian millet 3,800 



Barley Plowed 



Hungarian millet. . . . 4,040 



Oats 2,340 



10.0 



28.8 

 30.8 

 47.8 

 30.4 

 13.2 

 64.4 

 26.8 

 32.2 

 under 

 33.8 

 26.2 



Total 34,660 344.4 



