The rubber tree book . Fig. 43.—Broad V System of Tapping- the system described in the circulars, in the same way on all thetrees, except that the interval between successive tappings wasdifferent for the different rows. The following table shows theaverage interval in days between successive tappings, and thenumber of years allowed for renewal on the system adopted:— I. II. III. IV. v. VI. VII Interval 3-9 5-1 days. Period of renewal 4 6 7 8 9 10 years The average yield per tapping of ten trees is given ingrammes in the following table, which covers he last six months
The rubber tree book . Fig. 43.—Broad V System of Tapping- the system described in the circulars, in the same way on all thetrees, except that the interval between successive tappings wasdifferent for the different rows. The following table shows theaverage interval in days between successive tappings, and thenumber of years allowed for renewal on the system adopted:— I. II. III. IV. v. VI. VII Interval 3-9 5-1 days. Period of renewal 4 6 7 8 9 10 years The average yield per tapping of ten trees is given ingrammes in the following table, which covers he last six months i64 THE RUBBER TREE BOOK of 1908 and the whole of 1909, 1910, 1911. During the wholeof this time the experiment was carried on without a break. Average Yield per Tapping. I. II. III. IV. V. VI. VII. 1908 100 107 148 158 169 210 163 1909 57 72 86 91 113 121 108 I9I0 58 69 67 96 118 115 115 I9II 87 78 143 169 176 154 One of the best-yielding trees in Row III. had, unfortu-nately, to be cut out early in 1910 owing to
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Keywords: ., bookcentury1900, bookdecade1910, bookidrubbertreebo, bookyear1913
