. Intensive farming and use of dynamite . terward. How it is Done Dynamite digs the cleanest and most regular ditches in wetclay or gumbo. In this kind of ground it is not necessary to putthe holes so close together, or to use quite so much dynamite as whenthe clay is only damp. In dry clay, sand marl, or other loose ground,the weaker and consequently less expensive grades of dynamite givebest results. If the soil is very light, it may occasionally be necesary to trimup the ditch a little by hand after the blast, but even then it isat least 25 per cent, cheaper to dig the ditch with dynamite t
. Intensive farming and use of dynamite . terward. How it is Done Dynamite digs the cleanest and most regular ditches in wetclay or gumbo. In this kind of ground it is not necessary to putthe holes so close together, or to use quite so much dynamite as whenthe clay is only damp. In dry clay, sand marl, or other loose ground,the weaker and consequently less expensive grades of dynamite givebest results. If the soil is very light, it may occasionally be necesary to trimup the ditch a little by hand after the blast, but even then it isat least 25 per cent, cheaper to dig the ditch with dynamite thanby machine, and it is also many times quicker. When ditches are dug in wet clay it is best to explode thedynamite with blasting cap and waterproof fuze. If the holes arespaced the proper distance, only the hole in the middle of therow requires a blasting cap, as the explosion of the dynamite in thishole explodes that in the next holes on either side, and so on almostinstantaneously from hole to hole, to the two opposite ends of the 47. GETTING THE FARM IN SHAPE row. This plan of exploding the dynamite in one hole by that inthe next hole, instead of putting a detonator in each hole, worksbest in wet ground, and when the ground and water are not temperature of the air, water and ground is an important it is below 50 degrees F., the dynamite may become so insensitivethat the charge in one hole will not explode the next one. It is,therefore, recommended that whenever possible, this work be donewhen the ground is wet and the weather warm. When all conditions are favorable the holes can be spaced twofeet apart, put down three feet and loaded with one cartridge,1 J/4 x 8 inches of 50 per cent, or 60 per cent, dynamite, for a ditchfour feet deep and six feet wide at the top. Three men can dig athousand feet of this ditch in three days, with two hundred andfifty pounds of dynamite, and at about one-third of the cost of anyother method. Fifty, sixty, or even a greate
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