. Improving crop yields by the use of dynamite . m six hills would in a very few yearspay for enough dynamite to blow out many stumpsand boulders. One suggestion which should be made to those who have landto clear is: Always do your stump blasting, if possible, when theground is wet. Almost every kind of ground when it is wet, offersstronger resistance to the action of dynamite than it does when , when the ground is wet a stump or boulder can beblasted out with less djmamite than when the same ground is dry. One of the most objectionable methods of trying to get rid ofstumps is bu
. Improving crop yields by the use of dynamite . m six hills would in a very few yearspay for enough dynamite to blow out many stumpsand boulders. One suggestion which should be made to those who have landto clear is: Always do your stump blasting, if possible, when theground is wet. Almost every kind of ground when it is wet, offersstronger resistance to the action of dynamite than it does when , when the ground is wet a stump or boulder can beblasted out with less djmamite than when the same ground is dry. One of the most objectionable methods of trying to get rid ofstumps is burning them out. When stumps have been blasted outand split up with dynamite, it is an easy matter to heap up thepieces and burn them, but to burn a standing stump is a differentproposition. Those who have tried it can testify to the time spentin keeping the fire going, and that it is practically impossible in thisway to get rid of much of the stump below the surface of the the worst feature of burning out stumps is the damage 17. CLEARING THE LAND done to the ground by the fire, which burns out the humus to suchan extent that it requires much cultivation to bring the ground wherethe stump was burned into good condition. The following fromthe Tacoma, Wash., Ledger** of October 20, 1909, explains veryclearly the damage done to new land by burning out stumps: Last summer Prof. W. J. McGee, of the Depart-ment of Agriculture, in cooperation with Prof. HenryLandes, Dr. Benson and Dr. Fry, of the State Univer-sity, studied the best methods of utilizing cut-over orlogged-off lands. Prof. McGee gives some of the find-ings, and they argue strongly against burning cut-overlands. Fire destroys the humus in the soil, and when thehumus is gone, the fertility is greatly lessened. The dangerof burning logged-off lands is that the fire will burn thehumus for some distance below the surface. When thehumus is burned out, it takes time to build up a fertilesoil again. The fire dest
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