Show showing the relation of drought and crops Ite reports ports from many sections of the area that suffered severely from the 1930 drought showed that the yields of many crops were above normal this season this is particularly true of cotton in the southwest and of wheat in the middle west this simply means that the small crops produced drew lightly on the available plant food whether supplied by the soil or in the form of commercial fertilizers that on account of subnormal rainfall rain rainfall fali during the fall and winter the available plant food which was left in the soil including even the nitrates in many cases was not leached beached out and that this plant food that was carried over plus that which normally becomes available through biological and geological processes was sufficient to produce a bumper crop in 1931 even though the plant food supplied by commercial fertilizer was below normal the real test of the attempt to grow i crops without fertilizer will come in 1032 1932 then by reason of large crops in 1931 no more than the usual supply of available plant food will be left in the soll soli exchange |