Follow us please through our regular process of crop rotation and soil
preparation beginning just as we have finished digging and shipping a
crop of Kellogg Pedigree Plants in May.
The ground on which these plants were grown is first plowed deeply
(eight to nine inches) after which it is harrowed repeatedly both with
spring tooth and disc. Following this it is packed with roller and the
result is a perfect seed bed thoroughly pulverized the full depth of
plowing. All vegetation which remained at the time of plowing has been
cut up and crushed so as to decay rapidly.
The ground is then seeded to alfalfa and remains in this crop for three
years. The first two years it is cut for hay. The third year the first
crop is mowed and allowed to remain on the field as a mulch just as it
falls from the mower blade. The second growth comes up through this
mulch and the entire crop is then plowed under.
[Illustration: Root of two-months-old legume plant showing numerous
bacteria nodules. These vary in size, shape and number according to the
age of the plant.]