CIRCULAR NO. Ill, BUREAU OP PLANT INDUSTRY. 



Table II. — Composition of cornstalks grown and analyzed at Washington, D. C. — Con. 



SUMMARY SHOWING CHANGES IN COMPOSITION OF JUICE FOLLOWING REMOVAL 



OF EARS. 



Date of 

 analysis. 



Aug. 27 

 29 



Field treatment. 



/Ears removed 



\Ears not removed 



(Ears removed 



\Ears not removed 



c . o /Ears removed 



aepi. 6 -i Ears not removed 



. |/Ears removed 



\Ears not removed 



10 

 12 

 17 

 19 

 24 



/Ears removed 



\Ears not removed 



(Ears removed. 



\Ears not removed 



(Ears removed 



(Ears not removed 



/Ears removed 



\Ears not removed 



/Ears removed. . 

 \Ears not removed 



„„ /Ears removed. . . 

 i\Ears not removed 



Oct. 



1 

 3 

 8 

 10 

 15 

 17 

 22 

 24 

 29 



/Ears removed 



\Ears not removed 



/Ears removed.. . 

 \Ears not removed 



/Ears removed. . . 

 \Ears not removed 



/Ears removed.. . 

 \Ears not removed 



/Ears removed . . . 

 \Ears not removed 



Ears removed. . . 

 t Ears not removed 



/Ears removed... 

 \Ears not removed 



/Ears removed. . . 

 \Ears not removed 



/Ears removed . . . 

 (Ears not removed 



Average increase or de 

 crease (— ) following 

 removal of ears 



Solids. 



Per 



cent. 



12.78 



10.08 



12.46 

 8.41 



14.11 



7.50 



14.50 

 8.70 



15.32 

 6.45 



16.81 

 6.30 



16/25 

 8.38 



15.64 

 6.99 



14.68 

 7.48 



9.50 

 5.97 



15.07 

 6.09 



15.30 

 6.87 



15.50 

 9.03 



15.52 

 8.95 



11.22 

 8.07 



10.45 

 10.08 



15.83 

 10.21 



13.87 

 9.65 



15.22 

 9.35 



}5.80{ 



Differ- 

 ence. 



Per 

 cent. 



\ 2.70 

 4.05 

 | 6.61 

 5.80 

 }• 8.87 

 J-10. 51 

 | 7.87 

 } 8.65 

 | 7.20 



Su- I Differ-jlnvert 

 crose. ence. sugar. 



Per 



cent. 

 7.58 

 08 



{1 



6.94 



{ 3.13 



/ 8.58 

 \ 2.64 



9.11 

 3.53 



/ 9.54 

 \ 1.81 



ft 



/10. 18 

 \ 2.53 



i 9.42 

 \ 2.53 



}, 

 }, 



}«■ 



| 6.47 



), 



) 

 I 

 ) 



}<■ 



}, 



4.86 

 1.63 



/ 9.42 

 \ 1.55 



57 



3.15 



.37 



5.62 

 22 



s7 



6.08 



'-'7 



10.70 

 39 



9.72 

 2.34 



10.02 

 4.24 



110.10 

 \ 4.24 



/ 6.40 

 \ 3.18 



{I 



{I: 



{ 



5.56 

 18 



9.46 

 86 



61 

 45 



9.01 

 3.73 



Per 

 cent. 



| 3.50 



3.81 



5.94 



5.58 



| 7.73 



} 9.39 



} 7.31 



7.65 



| 6.89 



| 3.23 



| 7.87 



7.38 



5.78 



\ 5.86 



| 3.22 



} .38 



2.60 



3.16 



} 5.28 



/ 1.74 

 \ 2.32 



5.40 



Per 



cent. 



2.88 



3.49 



2.90 

 2.76 



3.00 

 2.51 



2.24 

 2.92 



2.33 

 1.96 



1.98 

 1.80 



Per 

 cent. 



}•» 



}■ 

 h 

 } 



{?•" 



1.69 

 1.80 



1.51 

 1.83 



1.67 

 1.61 



1.85 

 1.42 



1.84 

 1.54 



1.70 

 1.93 



1.76 

 1.91 



1.62 

 1.92 



1.92 

 2.35 



2.26 

 1.96 



96 



2.38 

 2.57 



Differ- 

 ence. 



68 



.37 



18 



}■ 



\— .58 



h" 



}-.32 



} 



.06 



.43 



.30 



( 

 > 



|— .23 



}-'= 



| — .30 



} .30 



}• 



}- 



.7.1 



L9 



-.04 



Non- 

 su?ar 

 solids. 



Per 



cent. 

 2.32 

 2.51 



2.62 

 2.52 



2.53 

 2.35 



3.15 

 2.25 



3.55 

 2.68 



3.56 

 2.62 



3.81 

 2.67 



3.77 

 2.66 



3.75 

 3.12 



1.97 

 2.73 



3.80 

 3.12 



3.74 

 2.99 



3.78 



2.80 



3.66 

 2.80 



3.20 

 2.97 



2.97 

 2.55 



3.11 

 1.39 



3.71 

 3.24 



3.83 

 3.05 



Differ- 

 ence. 



Per 

 cent. 



}... 

 }.» 



| .90 



j .» 



| .94 

 } 1.14 



},.u 



I .03 



}-,« 



| .68 

 (.,5 

 92 



{ 

 { 



/ 60. 

 \ 35. 



/ 62. 

 \ 40. 



{ 

 { 



/ 65. 

 \ 40. 



!■ 

 >'■ 

 >■ 

 }■ 



>'• 

 }- 

 }- 



.02 



Pur- 

 ity. 



Per 

 cent. 

 59.3 

 24.7 



55.7 



37.2 



62.8 



7 



62.3 

 29.6 



67.0 

 30.0 



65.9 

 3 



65.1 

 36.2 



64.2 

 9 



51.1 

 3 



02.5 

 4 



/ 04. 

 \ 33. 



I 51. 

 \ 27. 



/ 02. 

 \25. 



/ 63.5 

 \ 34.0 



/ 64.6 

 \ 46.9 



/ 65.1 

 \ 47.4 



/ 57.0 

 \ 39.4 



/ 52.2 

 ( 51.3 



59.8 

 1 



/ 59. 

 \ 67. 



/ 54. 



\ 46. 



/ 59. 

 \ 39. 



54.9 

 1 



59.2 



Differ- 

 ence. 



Per 

 cent. 



34.6 



18.5 



25.6 



22.1 



• 32.7 



■ 37.0 



25.6 



28.9 



30.3 



23.8 



37.1 



29.5 



| 17.7 



} 17.7 

 } 17.6 



} ■• 



| -7.3 

 | 8.8 



} 



19.4 



22. 13 



The summary of Table II shows that very marked changes were 

 produced in the composition of the juice as a result of the removal 

 of the ears. Each analysis showed an increase in solids, in sucrose, 

 in nonsugar solids (with two exceptions), and in purity (with one 

 exception). Of the 19 determinations for invert sugar 9 showed an 

 increase and 10 a decrease, the average of which ( — 0.04 per cent) is 

 so small as to be considered negligible. 



[Cir. Ill] 



