17T&R.AR.Y UNIVERSITY: OF ILLINOIS- 1 G30.7 COp AGRICULTURE NOTICE: Return or renew all Library Materialsl The Minimum Fee for each Lost Book is $50.00. The person charging this material is responsible for its return to the library from which it was withdrawn on or before the Latest Date stamped below. Theft, mutilation, and underlining of books are reasons for discipli- nary action and may result in dismissal from the University. To renew call Telephone Center, 333-8400 UNIVERSITY OF ILLINOIS LIBRARY AT URBANA-CHAMPAIGN L161 O-1096 \ UNIVERSITY OF ILLINOIS Agricultural Experiment Station BULLETIN No. 280 CROP YIELDS FROM ILLINOIS SOIL EXPERIMENT FIELDS >IN 1925 BY F. C. BAUER URBANA, ILLINOIS, AUGUST, 1926 Location of Experiment Fields from Which Data are Presented in this Bulletin CROP YIELDS FROM ILLINOIS SOIL EXPERIMENT FIELDS IN 1925 BY F. C. BAUER, Chief Soil Experiment Fields The ILLINOIS AGRICULTURAL EXPERIMENT STATION for a number o'f years has conducted field investigations in all parts of the state to test the effectiveness of various soil treatments on yields of farm crops. The complete results from all these fields up to and including 1924 are reported in Bulletin 273. It is the purpose to keep this record up to date with the publication each year of the current results. The pres- ent bulletin is in the nature of such an annual supplement, giving the 1925 crop yields for the major investigations conducted on these fields. In both these publications the figures are presented as a matter of record, without comment or discussion. In a broad way, of course, the results speak for themselves and carry certain definite lessons to those who have been following the soil investigations of the Station. Discussions of these investigations have appeared from time to time in former Station publications, and further discussions of an interpre- tative nature will appear in future publications. The results reported in the following tables are for the individual fields arranged alphabetically, rather than by location or by soil types. The location of these fields in the state can be ascertained by referring to the accompanying map. All yields, except those in parentheses, indicate bushels an acre. Parentheses are used to denote tons of hay. EXPLANATION OF SYMBOLS In some of the following tables symbols have been used instead of words, to indicate soil treatments: R=Residues, consisting of cornstalks and straw in some cases. In addition, a green manure crop of biennial sweet clover is seeded in small grain, usually wheat, and the spring growth is plowed under for corn. On plots without limestone this sweet clover survives on only a few of the fields. L=Limestone, applied in amounts sufficient to grow clovers and alfalfa. rP Rock phosphate K=Potassium salts aP=Acid phosphate M=Stable manure bP=Bone meal O=Check plot sP Slag phosphate 159 160 BULLETIN No. 280 [August, TABLE 1. ALEDO FIELD Serial plot Soil treatment No. Series Series Series Series 100 200 300 400 Wheat Oats Corn Corn 1 None 24.2 54.4 79.4 65 2 Manure . 24.3 65 101 4 88 2 3 Manure, lime . 25.0 68.4 101 8 95 6 4 Manure, lime, rock phosphate . 35.8 70.3 106 6 101 2 5 None 19.3 60.4 83.0 73.4 6 Residues . 19.5 72.5 83.8 83.8 7 Residues, lime . 26.2 75.0 86.6 83.4 8 Residues, lime, rock phosphate . 40.2 78.1 92.8 87.4 9 Residues, lime, rock phosphate, kainit. 10 None . 43.5 81.3 96.4 102.4 . 18.7 67.8 76.8 72.6 TABLE 2. ALEDO FIELD: COMPARATIVE PHOSPHATE EXPERIMENT Serial Series 500 Series 600 Series 700 Series 800 plot Soil Soil No. treatment Oats treatment Oats Soil Soil treatment Oats treatment Oats 1 R.. ..63 9 R.. . 64 4 R 66.6 R.. ..45.0 2 RbP .. . 75 RaP .. . .76 1 RrP 70.3 RsP 663 3 RLbP 734 RLaP 781 RLrP 67 8 RLsP . . .66 7 4 RL 64 5 RL. . 64 1 RL . . 66 3 RL . . 53 9 TABLE 3. CARLINVILLE FIELD Serial S'ot Soil treatment 0. Series Series Series Series 100 200 300 400 Oats Wheat Clover- Corn alfalfa 1 None ." 28.9 18.1 (1.04) 58.1 2 Manure . 39.5 28.6 (2.12) 71.6 3 Manure, lime . 47.0 34.3 (5.11) 75.2 4 Manure, lime, rock phosphate . 44.8 34.9 (6.43) 71.0 5 None 27.0 22.9 (2.49) 57.6 6 Residues . 33.9 22.6 (2.39) 60.6 7 Residues, lime . 55.9 27.3 (4.54) 59.8 8 Residues, lime, rock phosphate . 57.0 34.5 (5.64) 59.9 9 Residues, lime, rock phosphate, kainit . . 10 None 51.3 36.4 (6.28) 76.1 . 27.5 19.9 (2.24) 60.5 1926} CROP YIELDS FROM ILLINOIS SOIL EXPERIMENT FIELDS IN 1925 161 TABLE 4. CARTHAGE FIELD Serial plot Soil treatment No. Series 100 Clover Series 200 Oats Series 300 Corn Series 400 Wheat 1 None (2.32) (2.64) (3.12) (3.22) (2.33) (2.62) (2.81) (3.11) (3.16) (2.13) 28.8 43.9 60.0 60.6 34.1 36.9 60.0 65.5 66.4 34.2 28.8 44.5 65.3 90.9 32.3 94.6 101.2 103.1 103.8 46.4 21.7 32.7 33.4 35.1 18.5 19.4 30.8 33.0 39.0 24.9 2 Manure 3 Manure, lime 4 Manure, lime, rock phosphate 5 None 6 Residues 7 Residues, lime 8 Residues, lime, rock phosphate 9 Residues, lime, rock phosphate, kainit . . . 10 None TABLE 5. CARTHAGE FIELD: GYPSUM EXPERIMENT Serial plot Soil treatment No. Series 500 Corn Series 600 Series 700 Corn Oats Stubble clover 1 Residues, lime 72.8 93.0 89.8 97.0 86.8 99.4 89.2 81.6 41.6 44.7 45.3 45.6 45.3 45.3 48.1 40.9 (2.03) (1.05) (1.10) (1.07) ( .85) ( .77) ( -73) ( .94) 76.0 69.8 65.0 65.2 57.2 71.4 60.8 68.4 2 Residues, lime, rock phosphate (100) .... 3 Residues, lime, rock phosphate (100), gypsum (100) 4 Residues, lime, rock phosphate (200) .... 5 Residues, lime, rock phosphate (200), gypsum (200) 6 Residues, lime, rock phosphate (400) .... 7 Residues, lime, rock phosphate (400), gypsum (400) 8 Residues, lime TABLE 6. CLAYTON FIELD Serial Series plot Soil treatment 100 No. Clover Series 200 Oats Series 300 Corn Series 400 Stubble Wheat clover 1 None (1.37) 45.2 61.1 68.1 68.3 46.7 45.2 62.2 69.4 69.7 46.7 37.7 71.4 92.8 94.9 49.9 68.5 104.9 105.5 103.9 44.4 6.5 8.6 16.7 16.1 7.8 8.0 13.4 14.3 21.1 8.9 ( .54) ( -60) (1-35) (1.56) 2 Manure (1.69) 3 Manure, lime (2.76) 4 Manure, lime, rock phosphate . . (2 . 86 ) 5 None (1.36) 6 Residues (1.15) 7 Residues, lime (1 . 41 ) 8 Residues, lime, rock phosphate . (1 . 66) 9 Res., lime, rock phos., kainit ... (1 . 88) 10 None (1.42) 162 BULLETIN No. 280 [August, TABLE 7. DIXON FIELD Serial plot No. Soil treatment Series Series 100 200 Clover Oats Series 300 Corn Series 400 Wheat 1 2 3 4 5 6 7 8 9 10 None (2.29) . (2.34) (2.25) (2.30) . (2.10) . (1.02) . (1-21) . (1.64) . (1.80) . (2.13) 45.0 60.6 75.3 70.0 50.3 52.2 55.9 71.9 76.3 45.9 55.8 85.0 87.6 92.6 63.0 64.0 79.6 81.0 81.2 66.4 10.7 25.2 35.2 38.0 14.3 21.3 29.2 36.0 38.5 12.0 Manure Manure, lime Manure, lime, rock phosphate None Residues Residues, lime Residues, lime, rock phosphate Residues, lime, rock phosphate, kainit . . None TABLE 8. ELIZABETHTOWN FIELD Serial plot No. Soil treatment Series 100 Wheat Series 200 Corn Series 300 Wheat Series 400 Clover- timothy 1 2 3 4 5 6 7 8 9 10 None 4.8 1.7 5.2 32.1 51.7 3.4 17.4 53.1 68.5 69.6 30.5 11.5 5.3 25.7 29.2 1.3 1.4 14.8 25.1 30.2 9.4 ( -36) ( .31) (1.01) (1.22) ( .20) ( .26) ( .79) ( -72) (1.09) ( -16) Manure 5.1 Manure, lime 7 4 Manure, lime, rock phosphate 11 3 None 1.3 Residues 1.1 Residues, lime 7.3 Residues, lime, rock phosphate . 14.0 Residues, lime, rock phosphate, kainit. None 15.1 5 8 TABLE 9 ENFIELD FIELD Serial plot No. Soil treatment Series 100 Clover- timothy Series 200 Oats Series 300 Corn Series 400 Wheat 1 2 3 4 5 6 7 8 9 10 None . (0.00) 10.5 21.9 26.7 24.4 11.9 13.3 22.8 23.1 27.3 18.1 10.8 17.8 35.0 33.7 11.7 15.9 26.2 34.4 38.6 17.1 12.2 19.1 31.8 27.9 14.2 14.9 28.6 30.8 31.8 15.8 Manure . (0.00) Manure, lime . (1.07) Manure, lime, rock phosphate . (1.19) None . (0.00) Residues . (0.00) Residues, lime . ( .76) Residues, lime, rock phosphate . (1 00) Residues, lime, rock phosphate, kainit . None . (1.29) . (0 00) 1926] CROP YIELDS FROM ILLINOIS SOIL EXPERIMENT FIELDS IN 1925 163 TABLE 10. EWING FIELD Serial plot Soil treatment No. Series 100 Clover- timothy Series 200 Oats Series 300 Corn Series 400 Wheat 1 None . ( -32) . ( .38) . (1.42) (1.42) . ( .38) . ( -46) . d.24) , (1-22) (1.38) . ( -42) 15.0 20.5 49.7 53.8 13.8 12.7 41.3 34.7 52.8 14.7 14.1 26.1 46.5 52.3 14.2 '21.2 38.9 50.3 59.5 16.4 8.8 11.9 41.7 39.2 10.8 13.6 37.3 46.0 49.3 8.9 2 Manure 3 Manure, lime 4 Manure, lime, rock phosphate 5 None 6 Residues 7 Residues, lime 8 Residues, lime, rock phosphate 9 Residues, lime, rock phosphate, kainit . . 10 None TABLE 11. HARTSBURG FIELD Serial plot Soil treatment No. Series 100 Wheat Series 200 Oats Series 300 Corn Series 400 Corn 1 None 33.5 33.3 29.2 33.5 24.8 31.7 23.3 30.5 33.2 30.3 36.3 44.4 44.1 44.4 42.8 44.1 41.3 42.2 42.5 40.6 44.0 65.0 77.2 71.4 59.6 68.6 71.4 74.8 73.8 55.2 43.8 58.0 66.2 65.0 50.0 79.6 87.8 88.4 82.8 49.2 2 Manure 3 Manure, lime 4 Manure, lime, rock phosphate 5 None 6 Residues 7 Residues, lime 8 Residues, lime, rock phosphate 9 Residues, lime, rock phosphate, kainit . . 10 None." TABLE 12. JOLIET FIELD Serial Series Series plot Soil treatment 100 200 No. Alfalfa Wheat Series 300 Clover Series 400 Oats Series 500 Corn Series 600 Corn 10.... ( 82) 10 3 ( .49) ( .63) ( -90) (1-13) ( .35) ( -53) ( .57) (1.41) (1.37) ( .39) 30.2 39.1 38.8 50.5 36.1 41.7 44.8 53.9 53.8 30.9 34.6 39.0 49.9 54.3 38.4 40.4 44.8 50.4 '56.2 35.6 42.5 55.1 56.5 56.6 46.8 54.1 53.9 55.0 56.9 45.0 2 M (1.44) 10.7 3 ML (2.36) 16.2 4 MLrP (3.29) 24.4 50... ( 55) 8 6 R ( .67) 7.9 7 RL (1.74) 14.8 8 RLrP (3.61) 31.8 9 RLrPK.. . (3.46) 39.2 10 ( .54) 22.0 164 BULLETIN No. 280 [August, TABLE 13. KEWANEE FIELD Serial plot No. Soil treatment Series 100 Clover Series 200 Oats Series 300 Corn Series 400 Wheat 1 2 3 4 5 6 7 8 9 10 None ( -97) (1-54) (1.51) (1.61) (1.31) ( .60) ( .79) (1.00) (1.05) (1.79) 55.0 75.8 76.4 69.7 50.9 58.4 63.6 74.7 73.9 49.1 56.8 70.8 73.0 80.4 59.1 61.8 68.0 82.6 77.7 56.2 23.4 24.0 24.4 35.9 20.1 23.4 29.2 35.9 35.0 27.4 Manure Manure, lime Manure, lime, rock phosphate . None Residues Residues, lime Residues, lime, rock phosphate Residues, lime, rock phosphate, None kainit. . TABLE 14. LAMOILLE FIELD Serial plot No. Soil treatment Series 100 Wheat Series 200 Oats Series 300 Corn Series 400 Corn 1 2 3 4 5 6 7 8 9 10 None 44.3 45.5 44.1 45.6 37.0 47.5 49.3 50.1 47.2 34.3 88.0 90.9 80.9 76.4 68.3 73.8 73.3 73.8 68.1 58.1 40.1 64.3 64.6 64.8 54.0 63.6 69.5 75.5 78.6 39.0 40.8 64.1 69.4 72.4 58.8 - 64.3 64.5 67.0 67.9 47.3 Manure Manure, lime Manure, lime, rock phosphate . None Residues Residues, lime Residues, lime, rock phosphate Residues, lime, rock phosphate, None kainit. . TABLE 15. LEBANON FIELD Serial plot No. Soil treatment Series 100 Wheat Stubble clover Series 200 Soybeans Series 300 Corn Series 400 Wheat 1 2 3 4 5 6 7 8 9 10 None 12.4 19.8 23.9 25.3 14.3 17.8 27.4 24.4 24.6 13.3 (0.00) ( -33) ( .87) ( .93) (0.00) (0.00) ( .74) ( .83) (1.18) (0.00) ( -99) (1.84) (1.98) (1.86) (1.02) (1.04) (1.43) (1-51) (1.87) (1.41) 30.9 53.0 65.6 62.9 23.1 48.8 75.9 84.7 78.3 40.6 26.2 33.1 30.9 41.0 28.5 30.9 38.8 39.7 43.2 29.2 Manure Manure, lime Manure, lime, rock phosphate. . None Residues Residues, lime Residues, lime, rock phosphate . Res., lime, rock phos., kainit . . . None 1926] CROP YIELDS FROM ILLINOIS SOIL EXPERIMENT FIELDS IN 1925 165 TABLE 16. McNABB FIELD Serial plot Soil treatment No. Series 100 Oats Series 200 Corn Series 300 Soybeans Series 400 Wheat 1 Residues 75.0 70.8 75.6 69.0 77.2 72.6 (1.50) (1.08) (1.15) (1.48) (1.34) 26.7 34.0 28.3 36.8 29.2 2 Residues, rock phosphate 81.9 3 None 81 6 4 Manure, rock phosphate 87 8 5 Manure 84.1 TABLE 17. MINONK FIELD Serial plot Soil treatment No. Series 100 Wheat Series 200 Oats Series 300 Corn Series 400 Corn 1 None 29.2 65.3 68.6 66.1 65.6 66.6 71.6 68.6 66.4 70.3 57.3 60.1 70.5 73.5 77.3 49.1 63.7 61.4 66.2 61.6 31.8 42.2 68.7 68.8 74.4 43.9 58.9 74.4 71.0 70.9 43.2 2 Manure 28 3 3 Manure, lime 29.8 4 Manure, lime, rock phosphate . 28.3 5 None 29.2 6 Residues 37.7 7 Residues, lime 30.2 8 Residues, lime, rock phosphate . 30.0 9 Residues, lime, rock phosphate,, 10 None kainit. . 25.5 16.2 r TABLE 18. MT. MORRIS FIELD Serial plot Soil treatment No. Series 100 Clover Series 200 Oats Series 300 Corn Series 400 Wheat 1 None . (1.73) 55.2 72.0 88.8 84.2 53.3 69.1 94.7 90.9 97.2 51.1 65.9 74.6 79.9 85.9 58.8 63.8 85.4 87.0 91.0 50.1 19.4 28.0 42.2 44.5 20.9 23.3 36.8 42.5 42.5 21.8 2 Manure (2.13) 3 Manure, lime (2.26) 4 Manure, lime, rock phosphate. . (2.15) 5 None . (1.99) 6 Residues ( .74) 7 Residues, lime ( .82) 8 Residues, lime, rock phosphate . ( .82) 9 Residues, lime, rock phosphate, 10 None kainit. . ( .86) (2.13) 166 BULLETIN No. 280 [August, TABLE 19. NEWTON FIELD Serial plot No. Soil treatment Series 100 Soybeans Series 200 Corn Series 300 Wheat Series 400 Corn 1 2 3 4 5 6 7 S 9 10 None. . . . (1:43) (1.48) (2.05) (2.13) (1.33) (1.13) (1.60) (2.03) (1.90) (1.10) 6.8 16.0 34.2 36.8 6.6 10.8 31.4 30.2 37.0 2.8 .5 0.0' 12.3 19.2 .5 .3 11.3 15.0 24.0 .5 4.6 15.2 28.2 19.0 5.0 5.8 4.2 1.2 0.0 2.8 Manure . Manure, 1 Manure, 1 None ime ime, rock phosphal p Residues Residues, Residues, Residues, None. . . . lime lime, rock phosphs lime, rock phosph* ite ite, kainit . . . TABLE 20. NEWTON FIELD: LIME EXPERIMENT High-calcium lime Dolomitic lime Serial Limestone plot Soil fineness No. treatment (meshes per inch) Series 500 Corn Series 700 Sweet clover Series 900 Wheat Series 600 Corn Series 800 Sweet clover Series 1000 Wheat 1 2 3 4 5 6 $ 8 9 10 11 12 13 14 15 16 17 18 19 RrPK RrPKL RrPKL RrPKL RrPKL RrPKL RrPK RrPKL RrPKL RrPKL RrPKL RrPKL RrPK RrPKL RrPKL RrPKL RrPKL RrPKL RrPKL 17. 24. 20. 19. 11. 2. 3. 10. 10. 17. 20. 23. 10 33 32 . 29 , 24 23 14 6 8 6 6 6 8 2 2 6 6 2 2 8 2 ,4 ,4 0.00 1.23 1.63 1.40 1.45 1.25 0.00 1.57 1.32 1.40 1.92 2.60 0.00 3.07 2.70 2.47 2.27 3.07 0.00 4.2 4.5 6.5 7.0 9.5 9.3 3.5 8.7 8.2 5.3 5.3 5.5 4.5 5.7 6.0 8.2 8.0 12.5 6.3 22.6 28.2 42.4 14.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.2 2.4 9.8 13.6 12.0 15.4 17.0 28.8 0. 1 1, 1 1 1, 1 1 1 1 1 1 1 2 1 2 00 13 43 32 13 02 00 .48 30 35 40 57 .00 .75 .52 ,38 92 .67 00 5.2 8.0 9.3 10.5 10.2 11.8 8.2 13.0 12.8 12.3 8.0 6.5 3.0 8.2 13.8 14.0 10.3 15.3 9.7 4 down 4 to 10. . . . 10 down . . . 50 down . . , Burnt 4 down 4 to 10.... 10 down . . , 50 down. . , Burnt 4 down 4 to 10.... 10 down. . 50 down . . Burnt. Note. Limestone is applied to Plots 2 to 6 at the rate of 500 pounds an acre a year; to Plots 8 to 12 at the rate of 1,000 pounds; and to Plots 14 to 19 at the rate f 2,000 pounds. 1926} CROP YIELDS FROM ILLINOIS SOIL EXPERIMENT FIELDS IN 1925 167 TABLE 21. OBLONG FIELD Serial plot No. Soil treatment Series Series Series Series 100 200 300 400 SoybeansSoybeans Corn Wheat 1 None ( .94) 2 Manure. ( .95) 3 Manure, lime (1.02) 4 Manure, lime, rock phosphate (1 . 52 ) 5 None (.82) 6 Residues (.91) 7 Residues, lime (1 .36) 8 Residue, lime, rock phosphate (1 .39) 9 10 Residues, lime, rock phosphate, kainit. . None. . (1.62) ( -80) (1.73) (1.68) (3.35) (3.25) (1.13) (1.23) (3.09) (3.03) (3.45) (2.56) 12.6 32.8 50.2 49.2 24.4 30.2 38.6 47.2 58.8 26.0 1.8 4.8 22.0 24.7 4.0 8.7 18.5 26.3 32.7 6.5 TABLE 22. ODIN FIELD Serial Series Series Series Series plot Soil treatment 100 200 300 400 No. Sweet Corn Soybeans Wheat clover Land Not Tile-drained 1 None .44 23 1 ( 96) 6 3 2 Residues 24 31 9 ( 98) 10 7 3 Residues, lime . 1.44 26.6 (1.34) 26.1 4 Residues, lime, bone meal 93 24 8 (1 19) 27 1 5 Res., lime, bone meal, potas. sulfate. . . . 2.28 43.7 (1-52) 27.5 Land Tile-drained 6 None 00 16 2 ( .74) 8 7 Residues .44 18 1 ( 68) 9 8 Residues, lime . 2.53 09) 6 9 Residues, lime, bone meal . 2.24 31 6 (] .44) ?7 3 10 Res., lime, bone meal, potas. sulfate . . . . 2.38 39. 9 (1. 46) 23, 7 TABLE 23. ODIN FIELD: COMPARATIVE PHOSPHATE EXPERIMENT Serial plot No. Soil treatment Light lime Series Series 500 600 Wheat Corn Heavy lime Series Series 700 800 Wheat Corn 1 Residues, lime, kainit, bone meal 15.2 24 . 24 . 2 39 . 8 2 Residues, lime, kainit 8.7 25*8 25.5 42.6 3 Residues, lime, kainit, acid phosphate. .. 12.3 30.4 20.8 41.0 4 Residues, lime, kainit, rock phosphate .. 14.5 18.0 22.0 42.2 5 Residues, lime, kainit 7.3 15.6 17.3 44.2 6 Residues, lime, kainit, slag phosphate ... 14.5 11.6 23.0 44.0 168 BULLETIN No. 280 [August, TABLE 24. ODIN FIELD: SWEET CLOVER ROTATION EXPERIMENT Rotation Soil treatment Corn Soybeans Wheat Sweet clover Three-year Residues, lime, bone meal Four-year Residues, lime, bone meal 34.6 29.7 (1.25) (2.67) 3.3 22.2 2^67 TABLE 25. OQUAWKA FIELD Serial plot No. Soil treatment Series 100 Corn Series 200 Alfalfa Series 300 Rye Series 400 Soybeans Series 500 Wheat Series 600 Soybeans 1 2 3 4 5 6 7 8 9 10 0.. 47.0 59.8 73.7 81.7 52.8 44.0 66.5 70.4 68.4 52.3 (0.00) ( .26) (1.07) (1.02) ( .19) ( -33) (1.12) ( .95) ( .84) (0.00) 9.4 8.2 9.5 6.3 4.1 5.2 6.7 7.6 10.7 9.3 (1.08) (1.13) (1.18) (1-25) (1.08) (1.13) (1.18) (1.23) (1.05) ( .88) .5 4.6 9.3 9.5 3.3 5.1 8.3 8.8 11.2 6.7 (1.23) (1.43) (2.28) (2.15) (1.05) (1.15) (1-88) (1,78) (1.55) ( .75) M ML MLrP 0.. R RL RLrP... . RLrPK . . TABLE 26. PALESTINE FIELD Serial plot No. Soil treatment Series 100 Corn Series 200 Wheat Series 300 Sweet clover Series 400 Rye Series 500 Soybeans 1 2 3 4 5 6 8 9 10 None 14.2 19.0 12.4 12.4 9.2 10.0 .4 .9 1.8 11.4 8.5 11.0 15.5 14.5 9.8 11.3 25.8 29.8 26.8 10.0 .45 1.38 5.78 7.22 .28 1.28 5.83 5.33 4.88 .55 15.5 14.1 15.2 16.3 13.2 12.9 18.8 18.2 18.4 13.2 ( .74) ( .85) (1.16) (1.22). ( .95) (1.09) (1.28) (1.28) (1.26) (1.00) Manure Manure, lime Manure, lime, rock phosphate . . None Residues Residues, lime Residues, lime, rock phosphate . Res., lime, rock phos., kainit. . . None , 1926] CROP YIELDS FROM ILLINOIS SOIL EXPERIMENT FIELDS IN 1925 169 TABLE 27. RALEIGH FIELD Serial plot No. Soil treatment Series 100 Clover- timothy Series 200 Oats Series 300 Corn Series 400 Wheat 1 2 3 4 5 6 7 8 9 10 None . (0.00) 12.8 25.9 44.7 46.9 17.5 22.5 32.2 40.3 42.5 15.6 17.4 29.0 33.2 37.0 11.8 20.0 37.2 54.0 52.8 24.4 1.8 7.3 25.5 26.7 3.5 5.8 22.0 26.7 28.2 9.2 Manure - ( -44) Manure, lime . (2 24) Manure, lime, rock phosphate . . (2 37) None . ( 41) Residues . ( .32) Residues, lime . (1.00) Residues, lime, rock phosphate. . (1.68) Residues, lime, rock phosphate, None kainit . . (1.98) . (0.00) TABLE 28. SIDELL FIELD Serial B'ot 0. Soil treatment Series 100 Oats Series 200 Alfalfa Series 300 Corn 1 Series 400 Wheat Series 500 Clover 1 2 3 4 5 6 7 8 9 10 None 22.5 25.6 27.3 33.6 14.4 20.3 28.9 36.9 38.3 28.1 (1.10) (1.64) (3.74) (5.56) ( .68) (1.15) (3.68) (4.78) (5.89) (2.02) 52.7 51.1 56.9 55.8 24.9 35.1 34.2 48.2 54.9 41.1 37.6 42.8 41.3 42.5 32.2 33.0 30.8 32.0 31.3 25.8 (1.84) (2.27) (1.88) (2.13) (1.26) ( .64) ( .73) (1.17) (1.35) (1.03) Manure Manure, lime Manure, lime, rock phosphate . None Residues Residues, lime Residues, lime, rock phosphate . Res., lime, rock phos., kainit. . . None J Manure was applied to Plot 301 by mistake in the spring of TABLE 29. SPARTA FIELD 1925. Serial plot No. Soil treatment Series 100 Soybeans Series 200 Corn Series 300 Sweet clover Series 400 Wheat 1 2 3 4 5 6 7 8 9 10 None . ( -72) 26.8 39.2 53.6 62.0 19.2 23.0 48.8 51.4 66.0 17.0 0.00 0.00 3.18 1.98 0.00 0.00 2.27 2.83 4.50 0.00 . 3.0 6.7 20.7 25.7 7.8 8.3 24.7 26.5 22.2 5.8 Manure . ( .79) Manure, lime . (1.71) Manure, lime, rock phosphate . . (1.85) None . . . . ( .65) Residues . . ( .88) Residues, lime. . . . (1.51) Residues, lime, rock phosphate . Residues, lime, rock phosphate, None . (1.74) kainit . . (1.85) . (1.07) 170 BULLETIN No. 280 [August, TABLE 30. SPARTA FIELD Serial plot No. Soil treatment Series 500 Cowpeas Series 600 Timothy Series 700 Wheat Series 800 Corn 1 2 3 4 5 6 None . . (1.13) ( .46) ( .86) (1.67) (1.76) (1.50) ( -26) 10.8 15.8 28.3 38.2 40.8 9.2 15.0 14.6 58.2 68.0 63.2 20.6 Manure ... (1.27) Manure, lime ... (2.03) Manure, lime, rock phosphate ... (2.26) Manure, lime, rock phosphate, kainit . None . (2.82) ... (1.87) TABLE 31. SPRING VALLEY FIELD Serial plot No. Soil treatment Series 100 Clover Series 200 Oats Series 300 Corn Series 400 Wheat A B 1 2 3 4 5 6 7 8 9 10 Legumes, lime, acid phosphate . ( .96) 35.9 35.0 43.4 47.2 53.1 61.9 49.7 46.9 48.1 52.8 45.3 37.8 46.0 51.0 45.0 53.2 53.4 59.2 54.0 54.8 59.8 57.4 58.6 53.4 31.8 33.3 33,2 40.2 36.8 44.0 38.8 39.8 40.0 44.7 41.8 38.2 Legumes, lime, rock phosphate . .. ( .86) None . (1.50) M anure ... (1.19) Manure, lime ... (1.11) Manure, lime, rock phosphate . .. (1.04) None . (1.33) Residues . .. ( .85) Residues, lime ... ( .71) Residues, lime, rock phosphate ( 81) Residues, lime, rock phosphate, kainit None ... ( .78) ... (1.11) TABLE 32. TOLEDO FIELD Serial plot No. Soil treatment Series 100 Sweet clover Series 200 Oat hay Series 300 Corn Series 400 Wheat 1 2 3 4 5 6 7 8 9 10 None 0.00 ( -32) ( -39) ( -90) ( .85) ( -17) ( .42) ( .62) ( .97) (1-01) ( .19) 26.0 34.4 52.8 52.0 26.0 26.6 40.8 36.6 51.0 22.8 7.5 11.8 25.3 27.8 11.5 18.7 23.3 24.0 33.7 3.7 Manure ... 0.00 Manure, lime . . . 3 . 83 Manure, lime, rock phosphate . .. 2.95 None ... 0.00 Residues ... 0.00 Residues, lime . .. 3.03 Residues, lime, rock phosphate . .. 2.15 Residues, lime, rock phosphate, kainit None 3.83 .16 1926'] CROP YIELDS FROM ILLINOIS SOIL EXPERIMENT FIELDS IN 1925 171 TABLE 33. UNION VILLE FIELD Serial plot No. Soil treatment Series 100 Soybeans Series 200 Seed cotton Series 300 Corn Series 400 Oats 1 (Ibs.) 1 None . . . (1 .74) 260 14 ?, 11 6 2 Manure . (1 .35) 450 16 13 1 3 Manure, lime n ,89) 620 31 4 22 8 4 Manure, lime, rook nhosnhate (1 ,81) 700 ?9 8 ?0 9 5 None. . . (1 .00) 280 5 ?, 11 6 6 Residues (] .19) 260 11 10 9 7 Residues, lime. (1 .59) 310 39 6 17 5 8 Residues, lime. rock phosphate (] ,72) 510 41 4 25 3 9 Residues, lime, rock phosphate, kainit . . (1 .88) 780 42 .8 24 .7 10 None . . . , (I .00) 150 9 .4 8 .1 *Oats grown as a substitute for wheat. TABLE 34. URBANA, DAVENPORT PLOTS: WEST HALF Serial plot No. Soil treatment Series 100 Corn Series 200 Alfalfa Series 300 Wheat Series 400 Clover Series 500 Oats 1 None. 2 Residues 3 Manure 4 Residues, lime 5 Manure, lime 6 7 8 10 Residues, lime, rock phosphate. Manure, lime, rock phosphate. . Residues, lime, rock phosphate, potassium sulfate ........ Manure, lime, rock phosphate, potassium sulfate ........ Manure x 5, lime, rock phos- phate x 5 ............... 62.6 55.5 65.0 55.8 66.9 56.3 63.0 58.2 66.0 62.0 (1.98) (1.83) (1.64) (2.51) (2.38) (4.21) (4.31) (5.08) (5.43) (5.78) 17.7 15.9 21.6 32.0 41.4 53.3 50.0 48.4 48.2 47.2 .60) .50) .82) (1.10) (.98) (1.21) (1.51) (1.57) (1.86) (1.74) 36.4 39.3 38.8 38.5 42.8 52.0 49.4 53.3 54.3 64.7 172 BULLETIN No. 280 {August, TABLE 35. URBANA, DAVENPORT PLOTS: EAST HALF Serial plot No. Soil treatment Series 100 Corn Series 200 Alfalfa Series 300 Wheat Series 400 Clover Series 500 Oats 1 None 61.8 (1.62) 13.8 ( .80) 39.4 2 Residues 61.8 (1.63) 16.3 (.85) 35.1 3 Manure 73.1 (1.68) 26.3 (1.00) 38.4 4 Residues, lime 58.3 (2.71) 36.0 (.94) 39.5 5 Manure.lime 75.8 (2.97) 43.2 (.97) 48.4 6 Residues, lime, bone meal 58.8 (4.68) 45.8 (1.41) 53.5 7 Manure, lime, bone meal 73.8 (4.89) 53.5 (1.55) 52.8 8 Res., lime, bone meal, potas. sulf. 60.8 (4.82) 50.3 (1.56) 57.0 9 Man., lime, bone meal, potas. sulf. 72.7 (5.23) 47.3 (1.46) 55.4 10 Manure x 5, lime, bone meal x 5. 60.5 (5.65) 46.1 (1.74) 61.9 TABLE 36. URBANA, MORROW PLOTS Plot 3 Plot 4 Plot 5 Serial (Continu- (Corn and (Corn, plot Soil treatment ous corn) oats ro- oats, clover No. Corn tation) rotation) Corn 1 Corn NW None 15.4 25.6 40.2 SW Manure, lime, rock phosphate 41.7 39 . 4 57 . 4 NE None 22.9 27.8 43.9 SE Manure, lime, bone meal 49. 1 39.6 59.9 'A sweet-clover green-manure crop is plowed down for corn in addition to the standard soil treatment. TABLE 37. URBANA, SOUTH FARM: NORTHWEST ROTATION (Potatoes, corn, soybeans, alfalfa) Serial plot Soil treatment No. Series 100 Potatoes Series 200 Alfalfa 1 Series 300 Corn Series 400 Soybeans 43 W Manure, rock phosphate. .. . 30 9 65 8 33 7 46W Manure, rock phosphate . . 49 6 (5 43) 69 4 28 8 49W Manure 56.1 (4.90) 68.0 32.9 50W Manure. .... . 58 3 (4 56) 66 2 43 4 53 W Manure, rock phosphate 61.4 72.6 32.1 56W Manure, rock phosphate 57.2 (4.93) 75.3 32.3 43E Manure, lime, rock phosphate 26.2 75.1 33.7 46E Manure, lime, rock phosphate 42.6 (5.13) 75.1 32.4 49E Manure 59.9 (4.06) 75.3 35.3 50E Manure.. . . ... . . . 61 1 (4 84) 74 4 39 53E Manure, lime, rock phosphate 53.4 79.5 32.1 56E Manure, lime, rock phosphate 53.6 (4.47) 83.3 31.3 1 Alfalfa on Plots 243 and 253 was cut at different sta,ges of growth than on the other plots; hence the yields are not comparable. 1926] CROP YIELDS FROM ILLINOIS SOIL EXPERIMENT FIELDS IN 1925 173 TABLE 38. URBANA, SOUTH FARM: SOUTHWEST ROTATION (Corn, oats, clover, wheat) Serial plot Soil treatment No. Series 100 Oats Series 200 Clover Series 300 Wheat Series 400 Corn 63W 66W 69W 70W 73W 76W Residues, rock phosphate 39 ,6 5 3 .1 .1 ,1 .60 .33 .43 ( -03) ( -21) ( -21) 50.4 49.2 43.5 46.0 48.9 46.1 71. 73. 64. 69. 71 67. 1 8 6 Residues, rock phosphate . . 40 Residues 24, Manure 36 Manure, rock phosphate ... 43 Manure, rock phosphate 41 63E 66E 69E 70E 73E 76E Residues, lime, rock phosphate 45 .1 .6 .5 .7 .5 .5 .61 .43 .52 ( -10) ( .23) ( -23) 41 46 37 38 37 35 3 .3 ,2 .5 .8 ,2 66 68 52 64 68 75 8 3 ,2 .9 .0 Residues, lime, rock phosphate 37 Residues 26 Manure 33 Manure, lime, rock phosphate 40 Manure, lime, rock phosphate 43 TABLE 39. URBANA, SOUTH FARM: NORTH CENTRAL ROTATION (Corn, corn, oats, clover) Serial plot Soil treatment No. Series 500 Corn Series 600 Oats Series 700 Clover Series 800 Corn 43 Residues, rock phosphate 57 6 39.3 .52 58.8 46 Residues, rock phosphate 58.9 36 5 .32 60.5 jC AQ Residues 46.4 18.6 .43 51.9 50 Manure 57.6 28.1 .44 58.4 53 Manure, rock phosphate . . . . 61 44.5 .49 68.1 56 Manure, rock phosphate 59.3 43.2 .45 60.3 TABLE 40. URBANA, SOUTH FARM: SOUTH CENTRAL ROTATION (Corn, corn, corn, soybeans) Serial plot No. Soil treatment Series Series Series Series 500 600 700 800 Corn Corn Soybeans Corn 63 66 69 Residues, rock phosphate . Residues, rock phosphate. Residues. . 70 Manure 73 Manure, rock phosphate. 76 Manure, rock phosphate . 47.7 48.6 42.0 48.1 54.7 54.8 46.4 40.5 41.1 47.1 44.5 42.2 33.2 31.1 23.3 (1.83) (2.18) (2.14) 58.5 64.1 56.2 57.6 58.5 54.4 174 BULLETIN No. 280 TABLE 41. WEST SALEM FIELD Serial plot Soil treatment No. Series 100 Corn Series 200 Wheat 2 Series 300 Sweet clover Series 3 400 Oats Series 3 500 Soybeans 1 2 3 4 5 6 7 8 9 10 None . . . . . . 4 14. 15. 15. 5. 9. 9 10. 16 7. .4 9 1 8 8 2 3 7 9 4 20 20. 15. 30. 11. 13 20 35, 39 9. .6 4 8 7 4 2 4 8 6 1 2 3 2. 3 3 4 .19 05 83 78 17 75 00 08 50 00 3 23 33 36, 12. 18, 29, 37. 46 .3 4 3 ,7 2 6 4 5 1 ( .18) ( -45) ( .52) ( -55) ( .38) ( .40) ( .48) ( .55) ( .55) Manure, lime 1 Manure, lime Manure, lime, rock phosphate . . Lime 1 Residues, lime 1 Residues, lime Residues, lime, rock phosphate . Res., lime, rock phos., kainit. . . None initial application of lime only. "Plots 1 and 2 receive the overwash from Plots 3 and 4. 3 There are only 9 plots in Series 400 and 500. UNIVERSITY OF ILLINOIS-URBAN*