THE TEXTURE OF THE SOIL 



45 



erations, I should want that honor conferred upon Tull's 'Horse 

 Hoeing Husbandry.' It marked the beginning of the modern 

 application of scientific methods to agriculture, and promulgated 

 a system of treatment of the land which, in its essential princi- 

 ples, is now accepted by every good farmer, and the appreciation 

 of which must increase to the end of time." Bailey, Bull. 119, 

 Cornell Exp. Sta. Tull died in 1740. 



57a. " The actual contour of the water-table in an under- 

 drained field, where the lines of tile are placed at distances of 

 33 feet and 4 feet below the surface of the ground, is shown in 

 Fig. 8, which gives the contours as they existed forty-eight hours 



Fig. 8. Showing the actual contour of the water-table in a tile-drained field. 



after a rainfall of .87 inches. In this case the height of the 

 water midway between the lines of tile varied from 4 inches to 

 12 inches above the tops of the tile." King, The Soil, p. 259. 



58. Read Roberts' "Fertility of the Land," pp. 303-312, on 

 the physical effects of liming land ; also "The Soil," p. 30, and 

 Wheeler's "Liming of Soils," Farmers' Bulletin No.' 77, U. S. 

 Dept. Agric. The effects of lime in flocculating or mellowing 

 clay may be observed by working up a ball of stiff clay with 

 common water and a similar ball with lime water ; the former 

 will become hard on drying, but the latter will readily fall to 

 pieces. Lime water may be made by shaking up a lump of lime 

 in a bottle of water. 



60a. One of the most forcible illustrations of the value of 

 fine texture of soil is afforded by the result which the florist 



