Report on the Agricultural Experiment Stations, 1953 Page: 75
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FIELD CROPS 75
Planting rate for corn
Optimum planting rate of corn depends largely on soil fertility and
water-holding and storage capacity according to the Tennessee station.
Its extensive spacing-fertility experiments on good corn soilsmoderately
level, deep, friable, and well-drained-determined that a
population of 7,000 to 9,000 plants per acre, fertilized with 60 to 90
pounds of nitrogen and adequate phosphorus and potassium would
result in optimum yields. Acre spacings recommended are: 6,000
plants for 60-bushel yield and 10,000 plants for 100-bushel yield. A
stand of not over 12,000 plants was best for a full-season prolific hybrid
in experiments providing highest yields.
Working on Norwood silty clay loam, the Texas station finds that
for best yields and adapted hybrid such as Texas 24 should be fertilized
with 60 pounds each of nitrogen and phosphoric acid but no
potassium, with a stand of 6,500 or more plants per acre. Yields from
within-row spacings of 12, 18, or 24 inches were similar. The hybrid
outyielded a good open-pollinated variety by 12 bushels per acre or
30 percent across all treatments.
Fertility practices give high yields on poor soils
Through adoption of proper soil management and fertilizer practices
indicated by Missouri station research, corn yields of 100 or
more bushels per acre can be produced on soils once considered unsuitable
for the crop. A 100-bushel crop requires from 160 to 215 pounds
of nitrogen, 45 to 80 pounds of phosphorus (P205), and 90 to 175
pounds of potash (K20O). Fertilizers will supply needed additional
elements not released from the soils. Thick stands needed for maximum
utilization of added nutrients provide residues which can add
more organic material than will any other crop normally grown in
the Corn Belt and also afford protection during winter.
Popcorn dried without harm to expansion
That popcorn can be harvested with moisture content as high as
30 percent and dried artificially at temperatures up to 130 F. without
injury to popping expansion was determined by the Illinois station.
Popcorn is difficult to dry to the determined moisture level of 13 percent,
yet experiments indicated that the kernels may be over-dried
to 9 or 10 percent moisture, which is easier to control, and then be
reconstituted to the desired moisture level by blanching in live steam
with a standard cannery blancher having a fine-mesh metal conveyer
belt. Blanching bleaches popcorn to a brighter and more attractive
shade. Blanched samples, canned and held in an incubator at 98 F.
for longer than 2 months, showed no spoilage or deterioration in popping
expansion, which equaled that of crib-dried popcorn.
Wheat yields boosted by early plowing
Every week that plowing is delayed after wheat harvest reduces the
wheat yield 1 bushel per acre, according to the Kansas station. Early
plowing liberates plant food nutrients in the soil and increases soil
moisture content by reducing runoff, allowing water to be absorbed,
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United States. Office of Experiment Stations. Report on the Agricultural Experiment Stations, 1953, book, 1953; Washington D.C.. (digital.library.unt.edu/ark:/67531/metadc5989/m1/77/: accessed December 13, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.