. Bulletin. Agriculture; Agriculture -- Arizona. Timely Hints for Farmers* m This fortunate deficiency is probably in part due to those oc- casional downpours of rain characteristic of the southwest, which suddenly flood the surface of the country and which probably nt such times sweep away large amounts of soluble alkaline salts. This, indeed, has been observed to be true, as shown by the changed character of the salts in solution in Salt River in time of flood, The limit for black alkali in a soil varies with the kind of crop and the nature of the soil* Sugar beets, for instance, are more ha
. Bulletin. Agriculture; Agriculture -- Arizona. Timely Hints for Farmers* m This fortunate deficiency is probably in part due to those oc- casional downpours of rain characteristic of the southwest, which suddenly flood the surface of the country and which probably nt such times sweep away large amounts of soluble alkaline salts. This, indeed, has been observed to be true, as shown by the changed character of the salts in solution in Salt River in time of flood, The limit for black alkali in a soil varies with the kind of crop and the nature of the soil* Sugar beets, for instance, are more hardy than grains, and plants from arid countries usually. Fig. 9. Alkali flat, formerly a productive field but ruined by seepage and "rise of alkali.'* endure more alkali than those from humid regions. Clay soils, more than sandy ones, are injured in tilth by black alkali. In general, per cent of black alkali in the two top feet of soil will prove destructive to most crops. The injurious effects of black alkali are brought about in various Ways; it destroys the tilth of heavy soils, causing them to become cloddy and difficult to cultivate. Also, in presence of water, it dissolves the humus or vegetable mould in the soil and thus al-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original University of Arizona. Agricultural Experiment Station. Tucson : Agricultural Experiment Station, University of Arizona
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