TABLE SHOWING DROUGHT-ENDURANCE OF VARIOUS CROPS IN ARID REGION. ===================+=========================+==================== Free water in four | | feet of soil. | Crops that did well in |Crops that suffered ----------+--------+ lowest amount of |in highest amount of | Tons | moisture mentioned |moisture mentioned Per cent.| per | in first column. |in first column. | acre. | | ----------+--------+-------------------------+-------------------- 0 to 1.0 | 80 {|Apricots, Olives, Grapes,|Citrus, Pears, | {|Peaches, Soy-bean. | Plums, Acacia. | | | 1.0 to 1.5| 120 |Citrus, Figs. |Almonds, Apples. 1.5 to 2. | 160 |Almonds, Plums, Saltbush.|Barley. 2 to 2.5| { 176 |Prunes. | | { 200 |Walnuts, Eucalyptus. |Prunes. 2.5 to 3 | 224 |Apples. | 3 to 3.5| 288 |Pears. | 3 to 4 | 322 |Hairy Vetch. |Wheat. 4 to 5 | 400 |Wheat, Maize. | 5 to 6 | 480 |Sugar beets, Sorghum. |Sugar beets. ----------+--------+-------------------------+-------------------- CHAPTER XII. THE WATER OF SOILS.—_Continued._ SURFACE, HYDROSTATIC AND GROUND WATER; PERCOLATION. Since all the water of soils and plants is directly or indirectly derived from the rainfall (including therein snow and hail), some general points regarding this factor require first consideration. While it is not the object of this work to discuss climatology in detail, yet the times of the year and the manner in which precipitation comes, acts upon and is disposed of in the soil under different climatic conditions, must of necessity form an essential part of its subject matter.