. Annual report of the New York State College of Agriculture at Cornell University and the Agricultural Experiment Station. New York State College of Agriculture; Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). 1572 The Cornell Reading-Courses the water table should be not nearer than two feet from the surface for more than a few days at a time, and is better at about four feet below the surface. The root system of alfalfa varies with soil conditions. In a porous soil, easy to penetrate, the taproot will extend almost straight downward for lo to 20 feet, o
. Annual report of the New York State College of Agriculture at Cornell University and the Agricultural Experiment Station. New York State College of Agriculture; Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). 1572 The Cornell Reading-Courses the water table should be not nearer than two feet from the surface for more than a few days at a time, and is better at about four feet below the surface. The root system of alfalfa varies with soil conditions. In a porous soil, easy to penetrate, the taproot will extend almost straight downward for lo to 20 feet, or until the water table is reached. How- ever, if a stratum of hard soil is encountered, the taproot (\^,1 ' ^^'(\ will break up into a much- ^^ \\\\\'\'^\ branched root system. In a nvi\\\ inn^ very compact soil the roots not penetrate more than 3 or 4 feet, even when the plants are several years ?'/'J * VA K /A ;^' Fig. 236.— Drawing showing distribution of roots on a deep porous soil, and on a compact soil. In the first case a long taproot is developed, while in the second case the taproot breaks up into many branches LIME REQUIREMENTS Field and forage crops vary in their requirements of lime, or basic substances in the soil. Redtop and alsike clover will tolerate some acid in the soil, while many of our most important field crops, such as oats and buckwheat, seem to be quite indifferent to the presence of lime so long as the soil is not acid. Certain crops, notedly red clover and alfalfa, are very sensitive to the lack of lime. In order to grow alfalfa, lune must he applied to at least three fourths of the culti- vated soils of New York. By areas in New York State The map herewith (Fig. 237) shows the State divided into four principal soil areas, according to lime requirements for alfalfa. Where the soil has been derived in general from a formation, as in Section I, it usually will not be necessary, to add more lime. The presence of limestone peb
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