Japanese Journal of Farm Work Research
Online ISSN : 1883-2261
Print ISSN : 0389-1763
ISSN-L : 0389-1763
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Volume 22, Issue 2
Displaying 1-10 of 10 articles from this issue
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  • Effects of the Farm Work on the Growth and Yields of Vegetables
    I. The direct effect of weeding operation on weed removal
    Osamu KOBORI, Hisaharu KURATA, Kanji OTUKA
    1987 Volume 22 Issue 2 Pages 87-92
    Published: September 20, 1987
    Released on J-STAGE: February 09, 2010
    DOIhttps://doi.org/10.4035/jsfwr.22.87
    JOURNAL FREE ACCESS
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    The direct effect of farm work F(t) can be expressed as a theoretical equation on t, the time after planting.
    F(t)=1-G(t)-H(t)
    where G(t)=∫TTNfN(t)dt
    H(t)=∫TNOfO(t)dt
    ∫TOfO(t)dt=1
    and fN(t): empirical equation on the removed effect level, after the operation. fO(t): empirical equation on the removed effect level, without operation.
    From this equation F(t), the theoretical maximum direct effect can be estimated. An experiment for the weeding effect on Japanese radish were conducted, to analyze practically this theoretical equation. As the results of analysis, it was clarified that the effect of a single weeding at two weeks after planting was 96.5% of the corresponding effect under weed-free condition throughout.
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  • Improvement of the Welsh onion Lifter and Effects of Lavour saving in Harvesting by its use
    Oritaro ENDO, Michiaki ITO, Yoneji YAMASHITA
    1987 Volume 22 Issue 2 Pages 93-97
    Published: September 20, 1987
    Released on J-STAGE: February 09, 2010
    DOIhttps://doi.org/10.4035/jsfwr.22.93
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  • Studies on Drying Methods of Soybean's pods with Stem in Soybean-Barley Rotational Fields
    Yutaka KANETANI, Isamu KURATA, Kakeo KOYAMA
    1987 Volume 22 Issue 2 Pages 98-104
    Published: September 20, 1987
    Released on J-STAGE: February 09, 2010
    DOIhttps://doi.org/10.4035/jsfwr.22.98
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  • Assessment of Field Performance in Tractor Operations
    Naoki SAKAI, Wataru SUNOHARA, Satoshi YONEKAWA, Kosei TSUNODA
    1987 Volume 22 Issue 2 Pages 105-112
    Published: September 20, 1987
    Released on J-STAGE: February 09, 2010
    DOIhttps://doi.org/10.4035/jsfwr.22.105
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    In this paper we defined the surface F-T which consists of fuel consumption and working time for assessment of field performance in tractor operations.
    1) We plotted the various results from field experiments on the surface F-T, and classified these results into the five typical groups.
    2) We expected the four typical variations on the surface F-T when the load varied serially in the same tractor operations. Both ΔF and ΔT determined the direction and magnitude of variation, and an operating range of engine speed also effected on the variation types.
    3) When we plotted the several results from field experiments on the surface F-T to investigate an effect of load, the two variations of type II and III were observed as the load increased.
    4) To promote the rationalization of tractor working systems, we proposed the surface F-T as an index of assessment.
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  • Assessment of No-tillage Farming
    II. Direct energy input to the field
    Naoki SAKAI, Wataru SUNOHARA, Seiichi TAKATSUKA, Kunio ETO, Kosei TSUN ...
    1987 Volume 22 Issue 2 Pages 113-119
    Published: September 20, 1987
    Released on J-STAGE: February 09, 2010
    DOIhttps://doi.org/10.4035/jsfwr.22.113
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    This paper investigated the saving effect on direct energy input (consumed fuel) from a serial experiments of no-tillage farming (NT) and a conventional tillage farming (CT) for seven years.
    1) The NT saved direct energy input per unit area (Ea) of 49% in dent corn, 69% in feed turnip and 61% in barley and wheat in comparison with the CT because of omitting both plowing and harrowing.
    2) The order of Ea in the CT were harvesting>plowing>disk harrowing in dent corn, plowing>loading and carrying>disk harrowing in feed turnip, plowing>harvesting>disk harrowing in barley and wheat, so both plowing and harvesting required a lot of energy in the all operations.
    3) Disk harrowing required the most energy per unit time (Et) in the all operations.
    4) If the estimation of Ea and Et allows the error within 10% in seeding and fertilizing, energy calculation can used the same values of Ea and Et for both CT and NT.
    5) We estimated the turning points of profit and loss in energy balance with the everage yield of two crops published in Japan. If the NT attain the only 45% of CT yield in dent corn and the only 33% of CT yield in wheat, the output/input ratio of direct energy in NT was equivalent to that in CT from the result of estimation.
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  • Mental Workload of Simulated Monotonous Job
    Akira TAZAWA, Manabu SAKAI, Kazuhiko KURATA
    1987 Volume 22 Issue 2 Pages 120-126
    Published: September 20, 1987
    Released on J-STAGE: February 09, 2010
    DOIhttps://doi.org/10.4035/jsfwr.22.120
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    Eight young subjects were selected to perform three kinds of simulated and monotonous tasks, (inspection, sorting and pursuit tracking), for fifty minutes in each run.
    Questionnaire investigation of their subjective consciousness after work showed high complaints rate of negative feeling, alienation from work and unfitness of their aptitude for this kind of work.
    The changes of electroenceogram, heart rate increase, variation of heart beat interval, and work error revealed that the slack of nervous tension and the increase of error likely appeared around 10min, 25min and 40min after the beginning of each run, similarly in each task. Combining the reduction of CFF and the prolongation of response time with the above-mentioned results of physiological measurements, the mental workload for the three kinds of tasks seemed to be heaviest in pursuit tracking and lightest in sorting.
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  • The Annual Time Budget of the Farmer's Family Producing Tulip Bulbs (I)
    Sumio TACHI
    1987 Volume 22 Issue 2 Pages 127-133
    Published: September 20, 1987
    Released on J-STAGE: February 09, 2010
    DOIhttps://doi.org/10.4035/jsfwr.22.127
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  • The Annual Time Budget of the Farmer's Family Producing Tulip Bulbs
    In Busy Season (II)
    Sumio TACHI
    1987 Volume 22 Issue 2 Pages 134-141
    Published: September 20, 1987
    Released on J-STAGE: February 09, 2010
    DOIhttps://doi.org/10.4035/jsfwr.22.134
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  • Report on XXIInd CIOSTA Congress and Investigation on Farm Work Safety Research in the Netherlands and Sweden
    Manabu SAKAI
    1987 Volume 22 Issue 2 Pages 142-148
    Published: September 20, 1987
    Released on J-STAGE: February 09, 2010
    DOIhttps://doi.org/10.4035/jsfwr.22.142
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    A list of papers presented at the XXIInd CIOSTA Congress held at Hohenheim University, Stuttgart, FRG, in September 1986 was introduced in Table 1. The writer's brief comments on main papers were added in each of five sessions (Table 2).
    Results of the investigation on from work safety research at Dutch Agricultural University (Wageningen), Swedish University of Agricultural Sciences (Lund and Uppsala), Swedish Institute of Agricultural Engineering of the investigation in Table 3 had been sent in advance to each investigation spot before the writer's visit.
    The writer's comments were referred to the accident survey, safety devices of machinery, fire, air pollution in from buildings, protective equipments, health harzards, safety regulations, compensation systems for accidents and safety organizations. Also, the historical and social backgrounds of high consciousness for from work safety were assumed and discussed from a point of view of national welfare.
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  • Abstracts of the 22th Meeting
    1987 Volume 22 Issue 2 Pages 149-157
    Published: September 20, 1987
    Released on J-STAGE: February 09, 2010
    DOIhttps://doi.org/10.4035/jsfwr.22.149
    JOURNAL FREE ACCESS
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