Experiment Station Record, Volume 93, July-December, 1945 Page: 36
xiii, 941 p. ; 24 cm.View a full description of this book.
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36 EXPERIMENT STATION RECORD [Vol. 93
expt. stas.). (U. S. Dept. Agr., Bur. Plant Indus., Soils, and Agr. Engin., RSLM
122 (1944), pp. 119--, illus. 1).-Average agronomic and chemical results of the
uniform variety tests, groups IV to VI, and dates of planting tests for the 1943
season made in cooperation with 12 experiment stations in the Southern States
are reported.
The early development and rate of nutrient uptake by sugar cane, R. J.
BORDEN (Hawaii. Planters' Rec. [Hawaii. Sugar Planters' Sta.], 48 (1944), No. 1,
pp. 43-57, illus. 7).-Rates of development and NPK composition of below- and
above-ground portions of H 109 sugarcane started in different seasons were determined
from periodic harvests of pot cultures during the first 12 mo. of growth.
Concentration of N, P, and K decreased as plants grew older. Rates of dry matter
production were quite similar, except for the crop planted in August. Apparently
winter weather influencedd this planting at the age when it should have been doubling
its weight. The most rapid N uptake occurred between appearance of the
eighteenth and thirtieth leaves-about from 4 to'9 mo. Winter weather during
this growth period decreased the rate of N absorption. P absorption was quite
constant after the.crop was well under way. In the early stages, K was taken up
rapidly, but about midway in growth, an actual K loss from the plant tissues took
place.
Nitrogen efficiency, R. J. BORDEN (Hawaii. Planters' Rec. [Hawaii. Sugar
Planters' Sta.], 48 (1944), No. 3, pp. 197-202, illus. 1).-Panicum barbinode had a
more complete N uptake and made greater yields following N applied in May and
August than from similar amounts applied in February or November. Inferentially
a crop of sugarcane should obtain higher efficiency (E. S. R., 92 p. 204) from
summer than from spring N applications. Presumabl} it would take an application
of about 70 lb. in winter, or of 60 lb. in spring, to result in an equivalent N recovery
by the crop from only N 50 lb. applied in summer or fall.
Our field testing program, R. J. BORDEN (Hawaii. Planters' Rec. [Hawaii.
Sugar Planters' Sta.], 48 (1944), No. 1, pp. 1-6).--The scope of and progress results
obtained in cooperative replicated field tests with sugarcane are discussed, and
special reference is made to methods of plowing, widths of rows for new varieties,
weed control, subsurface fertilization, alternate row cultivation, N needs of varieties,
and the merits of growing of plant cane only v. plant cane plus ratoons.
A continuous supply of fresh sweetpotatoes for table use on the farm, C. L.
ISBELL. (Ala. Expt. Sta.). (Amer. Soc. Hort. S'ci. Proc., 45 (1944), pp. 391-395,
illus. 7).-That the average southern farmer can provide a continuous supply of
fresh sweetpotatoes for table use throughout the year was shown by planting,
harvesting, and storage experiments reported. The program indicated includes
planting early and harvesting small quantities of the largest roots for current use
during summer and early fall; and harvesting in fall before frost while the weather
is warm and the soil is dry, and storing just after harvest in ventilated or sheltered
banks with enough earth or other cover to avoid chilling during the coldest weather.
This will provide sweetpotatoes for fall, winter, and early spring. When dormancy
is over in late winter or early spring, the sweetpotatoes are removed from the
bank, put in a dry place, and chilling on cold nights prevented. Re-stored potatoes
that remain sound provide a supply from late winter or early spring until the new
crop is ready for use in midsummer.
Experiments on the leaf-burn of tobacco, J. JOHNSON, WV. B. OGDEN, and
O. J. ATTOE (Wisconsin Sta. Res. Bul. 153 (1944), pp. 75+-, illus. 9).-TImprovement
of the leaf burn of Wisconsin-grown tobacco is a major problem confronting
growers as well as local leaf dealers supplying manufacturers of cigars. The results
of the more detailed and technical aspects of leaf burn in research during the past
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U.S. Department of Agriculture. Agricultural Research Administration. Office of Experiment Stations. Experiment Station Record, Volume 93, July-December, 1945, book, 1947; Washington D.C.. (https://digital.library.unt.edu/ark:/67531/metadc5063/m1/49/: accessed April 23, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.