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Volume 9 (1978 - 1979･･･
- Issue 2 Pages 8-
- Issue 1 Pages 4-
Volume 9, Issue 2
Displaying 1-5 of 5 articles from this issue
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Yoshiteru MIYABE, Masatoshi ABE, Shin KOJIMA1979 Volume 9 Issue 2 Pages 8-17
Published: June 20, 1979
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSThe authors developed two coil spring type sugar cane stripping machines and the field performance tests were carried out.
A-type machine has three swinging coil spring stripping rolls, while B-type machine has three rubber fixed coil spring stripping rolls. The results obtained were as follows:
1) The stripping performance of A-type was; detrash percent 91.6-97.2%, trash percent 0.9-0.8%, cane loss 1.2-3.2% and working efficiency 714-1148kg/man-hr. The stripping performance of B-type was; 92.0-98.5%, 0.9-0.5%, 2.2-7.0%, 752-1143kg/man-hr.
2) Detrash percent and trash percent of A-type were inferior slightly compared with B-type, while cane loss of A-type was one halffold compared with B-type. Working efficiency was similar both two types.
3) The stalk damage was not observed both two types in any case, however, the durability of stripping materials of A-type (12 hours) was excellent compared with B-type (2 hours), because B-type coil spring was attached fixedly to rubber base of the roll. A-type machine was more practical.
4) The suitable revolution per minute of stripping roll and feeding roll of A-type leaf-stripping machine was 450-650rpm (9.42-13.61m/sec) and 25-35rpm (0.21-0.29m/sec).View full abstractDownload PDF (8730K) -
Two Dimensional Numerical Analysis and ExperimentMakoto NARA1979 Volume 9 Issue 2 Pages 18-25
Published: June 20, 1979
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESS -
Shin-ichi URANO1979 Volume 9 Issue 2 Pages 26-33
Published: June 20, 1979
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSTo make clear the condition of thermal environments of the monitor-roof dairy barn in mild climate, air temperature and humidity, temperatures on the roof and under the stall were meastred.
The results obtained from this study were as follows:
(1) When the maximum outside tempeature of one summer day was 27.2°C, the maximum inside temperature was 27.7°C. It is considered to be due to ventilation effect of the open space of monitor roof and thermal effect of the roof insulation.
(2) The inside relative humidity during the night in summer was nearly 100%. This seems to be influenced by outside ani humidity.
(3) The mean surface temperature on the stall in a day was approximately 26.3°C in summer and 18.4°C in winter. And there were no differences in the mean temperatures between the insulation stalls and the normal stalls.View full abstractDownload PDF (827K) -
Measurements of Specific Gravity of Dairy and Beef ManureRyo TORISU, Shigenobu KIMURA, Katumi TASHIRO1979 Volume 9 Issue 2 Pages 34-38
Published: June 20, 1979
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSDairy and Beef manure samples of various conditions were analyzed to determine their specific gravity, substantial density and void ratio.
The important conclusions which may be drown from this experiment are summarized as follows.
(1) There was no significant difference in the values of specific gravity between raw dairy and beef manure. The mean value ranged between 1.4 and 1.6.
(2) The specificg ravity of composting of cattle manure was slightly larger than that of fresh manure and the mean value was 1.6.
(3) In the process of aerobic composting the apparent specific gravity (Gam) of loosely filled was the function of moisture content (m) and could be expressed as following equation.
Gam (m)=0.00023m2-0.00870m+0.31162
(4) The results revealed that the specific gravity should be applicable to estimate void ratio and to measure specific heat.View full abstractDownload PDF (572K) -
Shyusaku KATAYAMA1979 Volume 9 Issue 2 Pages 39-45
Published: June 20, 1979
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSDownload PDF (761K)
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