Soils and Fertilizers, for Public Schools; A Discussion Upon the Nature and Treatment of Soils and the Value of Fertilizers
This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1915 edition. Excerpt: ...always wise to put a tile drain: (1) Flat lands along streams thai overflow in the spring. On such lands we must lower the level of the water in the soil as soon as possible after the overflow. If we do not drain such a soil we can not get our crops planted early, or save any crops that may have been planted before the overflow. (2) Flat land having a clayey subsoil. On such a land natural drainage can not take place, so artificial drainage must be supplied. (3) Low places or valleys in hilly land. The water must be drained from such places to remove the extra water that flows from the higher land all around. (4) Swamps and Marshes. Such places are wet almost all year and unless drained they are of little value. When such soils are properly drained they oft-times make our very best soil. EXPERIMENT NO. 25. Effect of Lime on Turbid Water. A clay soil will become more open and in better condition if it contains lime. This lime unites with the carbon dioxide of the air and flocculates (sticks together) the clay soil particles. A very excellent experiment for showing the action of lime on clay may be performed as follows: Stir a tablespoonful of clay with a pint of water. Let stand a moment and then fill two glass vessels with the muddy water. Glass tumblers or beakers are very good for this purpose. Into one of the glass vessels put a teaspoonful of lime and shake or stir it thoroughly. Leave the second vessel untreated, except to stir thoroughly. Let both vessels stand and observe them every few seconds to note any changes that may occur. Explain what happens. Account for this change. Write a discussion upon the value of lime. (See Fig. 35.) EXPERIMENT NO. 26. The Effect of Lime on Soils. Take two pans and make a stiff batter in each by...
- Paperback | 56 pages
- 189 x 246 x 3mm | 118g
- 13 Sep 2013
- Illustrations, black and white