Show water lo 10 the soil there are many things about tho physics of soils that remain to be explained one of them Is the movement of soil moisture both as relates to the water table and to the moisture pres ent by capillary attraction thus we notice that in some experiments made in north dakota it was determined that the water table falls during the winter season but there is little or no loss of soil moisture and there Is an actual gain of moisture in the surface soil which is not due to rain or snow A possible explanation Is that the cold earth even in its frozen state may act as a condenser of the moisture in the air on days when the temperature of the air Is above the freezing point another explanation may be that the air in the soil actually cincu lates toward the colder surface soil and deposits its moisture there by condensation just as is the case with the air above the soil however further investigation of the subject may show the main causes of such concentration of the water supply and its advantage to agriculture |