Experiment Station Record, Volume 92, January-June, 1945 Page: 176
The following text was automatically extracted from the image on this page using optical character recognition software:
176 EXPERIMENT STATION RECORD [Vol. 92
parison of molar and 0.5 M sodium carbonate in the determination, comparison of the
effect of ashing temperatures of 500 and 600 C., and the recovery of added coarserthan-20-mesh
dolomite in mixed fertilizers as affected by sampling.
The effect of liming materials upon the solubility of potassium compounds in
the soil, W. H. MACINTIRE. (Tenn. Expt. Sta.). (Amer. Fert., 99 (1943), No.
13, pp. 7-9, 24, 26).-Twenty-three yr. of lysimeter studies are presented on the
amount of potassium leached from Cumberland silt loam when treated with limestone,
dolomite, burnt lime, and burnt magnesia. The four liming materials caused
a repression in the outgo of potassium in teachings during the first 12 yr. when only
the liming material was added to the soil. Adding 166 lb. of potassium each year
for the next 11 yr., for a total of 1,826 lb., resulted in a recovery of 1,138 lb. from
the unlimed soil. The recovery of potassium from the unlimed soil was substantially
greater than from the four liming materials. Potassium recoveries obtained
were markedly repressed from acid Hartsells fine sandy loam when treated with
limestone or dolomite. The repressive effect prevailed whether the potassium was
added as nitrate, chloride, or sulfate.
In another study where burnt lime, magnesia, precipitated calcium carbonate,
magnesium carbonate, 100-mesh limestone, 100-mesh dolomite, and 100-mesh magnesite
were used at rates of 8-, 32-, and 100-ton equivalences of CaO, it was found
that each liming material resulted in a decrease in the amount of potassium leached.
The results thus indicate that heavy additions of any liming material will exert a
repressive effect upon the solubility of the potassium content of the limed zone of
Susceptibility of exchangeable potassium in Hawaiian soils to loss by leaching,
A. S. AYREs. (Hawaii Expt. Sta.). (Hawaii Planters' Rec. [Hawaii. Sugar
Planters' Sta.], 48 (1944), No. 2, pp. 83-92, illus. 2).-This report covers a laboratory
study of the effect of intensive leaching of four Hawaiian soils on soil potash.
The soils were so selected as to differ widely in exchangeable potassium. Increased
potassium leaching resulted when the samples were air dried. With soils having a
high initial content of exchangeable potassium, the susceptibility of potassium
leaching decreased with decreasing level of potassium in the soil. Greater losses
of potassium were found to be associated with high initial levels of potassium
saturation. Potassium lost from the soils ranged from 200 to 1,850 lb. of KO
per acre-foot of soil. Levels of exchangeable potassium were reduced by leaching
to from 30 to 80 percent of the original values.
Effect of waste sulfite liquor on aggregation of soil particles, R. B. ALDERFER,
M. F. GRIBBINS, and D. E. HALEY. (U. S. D. A. and Pa. Expt. Sta.). (Indus.
and Engin. Chem., 36 (1944), No. 3, pp. 272-274).-It has been estimated that the
annual discharge of waste sulfite liquor in the United States is about 27 million tons,
which means approximately 1,500,000 tons of lignin. In view of this potential source
material, investigation was made of the effect of this waste material on soil structure
and plant growth. The careful use of sulfite liquor gave a marked increase in the
number of water-stable granules. The workers point out that "if this material is to
be used as a soil amendment, the quantity to apply must be watched carefully, and
intimate mixing with the soil particles must be insured. A few weeks at least should
elapse before crops are seeded on soil so treated, in order to provide a suitable interval
for soil organisms to decay the less resistant materials. To insure more
rapid and thorough decomposition of these materials, the addition of an ample
quantity of a well-balanced fertilizer mixture should precede the treatment. This
mixture should carry from 40 to 60 lb. per acre of readily available nitrogen when
the equivalent of 5 tons of dissolved solids are used."
Plant culture and other studies with some guanidine compounds, B. E. BROWN.
(U. S. D. A.). (Jour. Amer. Soc. Agron., 36 (1944), No. 9, pp. 760-767).-The
nutrient values of diguanidine phosphate, triguanidine phosphate, diguanidine sulfate,
Here’s what’s next.
This book can be searched. Note: Results may vary based on the legibility of text within the document.
Tools / Downloads
Get a copy of this page or view the extracted text.
Citing and Sharing
Basic information for referencing this web page. We also provide extended guidance on usage rights, references, copying or embedding.
Reference the current page of this Book.
U.S. Department of Agriculture. Agricultural Research Administration. Office of Experiment Stations. Experiment Station Record, Volume 92, January-June, 1945, book, 1947; Washington D.C.. (digital.library.unt.edu/ark:/67531/metadc5064/m1/189/: accessed October 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.