. [Bulletins on forest pathology : from Bulletin , Washington, , 1913-1925]. Trees; Plant diseases. 30 BULLETIN 510, U. S. DEPARTMENT OF AGRICULTURE. Somewhat higher foundations than these are to be preferred in many situations, but in this yard, where every precaution was taken to keep the ground free from all infected debris, and where the drainage was excellent, this height has proved satisfactory. Piers have the advantage over a solid wall in permitting better ventilation, but piers also involve the use of wooden skids, which if not treated with a good preservative may more tha
. [Bulletins on forest pathology : from Bulletin , Washington, , 1913-1925]. Trees; Plant diseases. 30 BULLETIN 510, U. S. DEPARTMENT OF AGRICULTURE. Somewhat higher foundations than these are to be preferred in many situations, but in this yard, where every precaution was taken to keep the ground free from all infected debris, and where the drainage was excellent, this height has proved satisfactory. Piers have the advantage over a solid wall in permitting better ventilation, but piers also involve the use of wooden skids, which if not treated with a good preservative may more than offset the ad- vantage gained in better ventilation. The careless handling of crossing sticks and lumber in retail yards is just as evident as in mill yards. The gen- eral practice in many of the yards visited is to throw sticks about on the ground when the stacks are torn down, and there they often remain until they are needed again. This insanitary prac- tice needs no further comment. A compari- son of the yard shown in figure 40, where the lumber is scattered about promiscuously on the ground, with the yard shown in fig- ure 15, where concrete foundations and treat- ed ties are in use and all debris is carefully collected into a wagon (fig. 41) and hauled away, may be of interest in this connection. FUNGI WHICH ROT STORED Fig. 31.—A retail shed in Tennessee, well roofed, pro- vided with gutters, and set on brick piers with ample ventilation beneath from all sides. A considerable number of different species of wood-destroying fungi have been encountered in lumberyards. These, of course, are more frequently found fruiting on the foundations, tramway timbers, and ties than on the stored lumber, but this is only a question of the time which the timbers have been in the yard. The fact that elevated tramway posts and girders will rot in the South in a few years is proof conclusive that lumber stored in the open will also rot if it becomes necessary to hold it in stora
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