Repository: UIHistories Project: Board of Trustees Minutes - 1873 [PAGE 134]

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130

Taking the averages of these we get the following :

Growth m inches.

Per ct. living. 66.66 83.33 55.00 66.66 73.33 70.00 85.00 75.00 70.00 60.00

First cut of cion Second cut of cion Third cut of cion First cut of root Second cut of root Third cut of root Six inch roots Four inch roots Two and a half inch roots. One and a half inch roots .

21.17 20.44 20.95 22.61 21.00 18.60 27.75 24.50 22.83 20.93

The longest growth and largest per cent, of living grafts were on the six inch roots, not taking into account the roots three times larger than the cion from which we get no averages, and the length of growth and percentage of living grafts diminish pretty regularly as the length of root diminishes. Comparing different cuts of cions, we find that the first, or but cut, makes the longest growth; but the second cut the largest percentage of living grafts. Comparing cuts of roots, the first, or collar cut, makes the longest growth, and the second shows the largest percentage of living grafts. As in 1871, so in 1872, there appears to be very little difference between the first and second cuts, both of root and cion; and further experiments are necessary to determine which is practically the best. The comparison, of roots of different lengths shows that the experiments of 1872 give much more uniform and apparently reliable results. We are probably safe in saying that, planted under the conditions given, the longest rooted plant would give the best results ; not so much in greater length of growth, however, as in the larger percentage of living plants. Mr. Vickroy observes that in 1872— and the same was probably true in 1871—that grafts planted at a shallow depth started sooner and made a better growth than when they were planted deeply. This observation, no doubt, explains the remarkable growth of cions on short roots. The grafts of 1871, Mr. Vickroy has again counted and measured. The following table shows the growth and percentage of the same grafts in their first and second year :

Per A v e r ' g e A v e r ' g e Perg r o w t h g r o w t h cent, cent. i n 1871. i n 1872. l i v i n g l i v i n g 1871. 1872. 14.77 9.36 8.06 19.08 14.64 15.80 8.50 9.00 9.62 10.25 7.00 11.66 none 12.12 8.00 22.56 8.13 16.12 19.14 14.06 9.00 9.00 12.66 21.00 26.00 12.50 17.00 14.83 14.25 21.75 18.56 43.86 37.00 39.80 43.25 41.00 42.00 none 40.00 29.00 41.00 29.00 90. 70. 8060. 70. 80. 30. 30. 40. 70. 40. 30. none 40. 20. 80. 50. 80. 70. 60. 20. 10. 30. 30. 10. 40. 30. 30. 60. 80. 70. 70. 40. 50. 40. 20. 10. none 20. 40. 20. 10. 10, 10. 80. 40. 70. 60. 60. 10. 10. 10. 30. 10. 30. 20. 10. 40. 80. 70.

C u t of cions, e t c .

C u t of r o o t .

B u t nf 1 «t 2d 3d 4th 1st 2d 3d 1st 2d . art < 4t.h 1st 2d 3d 4th 6 4 4 2* 2* ' ' ' ' '

:

2£

2* 1* 1*

*

' ' '

H n •'' 2*

2* * "

4

Root 4

'

"

Collar or 1st " 1st 1st " 1st 2d 2d 2d 3d 3d 3d 3d 4th •' 4th 4th 4th «' 1st 2d 1st 2d. 1st 2d 3d 4th 1st 2d 3d 4th '' 1st i n v e r t e d 2d " «« 1st •• 1st

21.66

26.00 47.25 37.50 41.57 38.66 34.50 36 00 35.00 50.00 47.33 50.00 41.33 31.50 38.00 36.75 41.25 42.57