1048 



EXPERIMENT STATION RECORD. 



uii aver:iuf (liainctor of 4.7 in. In K' vears from now it is caU-ulated 

 that the j)olos will be worth ^2r)S. h; more than would have been 

 secured from the mark(>t priee of corn cultivated for the .same time 

 on the .same area. 



Additional notes on tree measurements, C E. Hall {Trans, and 

 Froc. Hot. Xnr. Ktlhihioyh. M {1900), pt. Jp,2>l>- ^4^3-258).— In the trans- 

 action,s of this society for 1890 (vol. IS. p. -456), the author reported upon 

 the rate of growth of a number of trees from measurements made at 

 San Jorge, Uruguay. Monthly measurements of these trees have been 

 made from January, 1885, to January, 1900. Sixteen trees were 

 measured — 2 eucalyptus,2 stone pine, 2 blackwood {Acaciamdafioxylo?)), 

 2 oaks, 3 Melia azedarach, 2 Lombardy poplars, 1 robinia, 1 maple, 

 and 1 Cottonwood. The increments in tree growths are shown in tabu- 

 lar form and comments given upon the causes of the variation in some 

 specimens. The growth of the trees during the period between 1890 

 and 1899 is shown in the following table: 



Growtli. of ti-eea during nine years at San Jorge, Uruguay. 



Kind of tree. 



Circumference of Increased growth 

 tree. of tree. 



January, January, 

 1890. 1899. 



Total. Annual. 



Eucalyptus sp 



Do 



Pinus pinea 



Do 



Acacia melanoxylon. 



Do 



Melia azedarach 



Do 



Do 



Quercusrobur (?) ... 



Do 



Pupulusfastigiala .. 



Do 



Populus angnlata. .. 

 Robinia pseudacacia 

 Acer pseudoplatanus 



Mm. 

 774 

 725 

 1,141 

 980 

 727 

 989 

 G09 

 G02 

 1,446 

 492 

 572 

 809 

 704 

 755 

 433 

 (j70 



Mm. 

 1,746 

 1,491 

 1,559 

 1,467 



932 

 1,460 



792 



768 

 1,632 



872 



814 

 1,008 



865 

 1,375 



536 

 1,055 



Mm. 

 'iTl 

 766 

 418 

 487 

 205 

 471 

 183 

 166 

 186 

 380 

 242 

 199 

 161 

 620 

 103 

 385 



108 

 85 

 46 

 64 

 23 

 54 

 20 

 18 

 21 

 44 

 27 

 22 

 18 

 67 

 11 

 43 



The author also shows the monthly rate of growth, from which the 

 effect of growing season and dormant period may be seen. 



Forest planting, W. Gill {Agr. Gaz. Nor Suulh Wnlen, 11 [1900), No. 12, pp. 

 1130-1132, figs. 7) . — The 2 methods by which voting trees are planted in South Aus- 

 tralia are termed the "open root" and "bamboo tube" systems. The open root 

 system consists of growing the trees in the open ground in nurseries, from which 

 they are transplanted by the usual method. Unless the young trees are carefully 

 protected, to prevent the drying out of the roots, many failures in planting will result. 

 The bamboo tube system, which consists of growing the plants in small sections of 

 the bamboo and setting them out in this way, is in many respects preferable. This 

 method is practiced very largely in the propagation of gum trees, it having been 

 found by far the best and most economical, as well as proving safer so far as root 

 exposure is concerned. 



