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The Root Growth Of Corn

The Root Growth Of Corn image
Parent Issue
Day
10
Month
April
Year
1891
Copyright
Public Domain
OCR Text

It is quite well known that growing corn is often injured by deep plowing, but no instance is remembered where the reasons f or it have been better given than has been done by the Ulinois Experiment station. The purpose of the experiments were to ascertain the number of the roots of corn and their depth at the points where they are likely to be disfcurbed by deep cultivation. Nine planta which averaged 12 inches high had altogether 94 roots, or an average of over 10 apiece. The longest was traced 35 inches when the plaat was 22 inches high. A plant 4i inches high had a root 13 inches long. Tbree-fourths of the roots wonld not have been broten by cultivating 3 inches deep, bat all ezcept one wonld have been at 4 inches. Seven other plaats had 97 roots, of which 78 were traced, with few exceptions, their estire engtix. Rather more than three-fourths of the roote w-oold not have been broken by cnltivation 3 inches deep; nearly two-tbirds woold have been at 4 inches. Over one-tirlrd were 4 inches deep at 6 inches frotn their base. Three went straight down. The roots (except those at the seed, wMch afterwards die) start nsoally at from one to two iachs from the snrface, without reference to the depth at which the seed has been pfcvnted. In case the seed has; been planted deeper than this, the stem' is simply elongated between the first or seminal whorl, and the second or first nodal whorl. Tiras, unless neceasitatedj by dryness, uothrog is gadned by plant-i ing corn over three inchea-deep. Deefer; planting wonld merely require of thet plazitecctr farce and time to reach a positioD wher the roote which eventoaDy noarish tbem will gfnr.