Gifu City Research Articles

Value of Feed Consumption Records to Predict Net Income in Layer-Type Chickens

The importance of measuring feed consumption as a supplementary criterion of net performance was studied from two different sources of data: (1) random sample egg production tests conducted in the United States between 1949 and 1957 (USRST) and (2) a private test of experimental commercial strains conducted by the Goto Hatchery, Inc., Gifu City, Japan, between 1968 to 1971 (GOTO). Seven traits included in the study were net income (NI), egg rate (ER), egg weight (EW), body weight (BW), mortality (MORT), maturity (MAT) and feed consumption (FEED). Performance indexes were derived as multiple regression equations with NI dependent on the other traits. To test the value of feed consumption records, two performance indexes were compared in each data source. The first, I(6), contained all 6 independent variables, and the second, I(5), contained all variables except FEED.The correlations between NI and I(6) were 0.820 and 0.824 and between NI and I(5) were 0.818 and 0.822 in the USRST and GOTO data, respectively. The difference between the correlations with and without feed was nil in either data source. Thus, measuring FEED did not significantly improve the predictive value of a performance index when prior information was available on the other five variables.I(5) was also compared with an empirical performance index, I(E), defined as the ratio of egg mass output to the ¾ power of body weight. The latter simulates a feed efficiency index where egg mass output is an estimator of feed utilized for egg production and the ¾ power of body weight is an estimator of feed used in the maintenance of body tissues. The correlations between I(E) and net income were 0.68 ond 0.74 in the USRST and GOTO data, respectively, which were only slightly lower than the corresponding correlations between net income and I(5) when the latter was applied to the data source other than that from which it was derived. Thus, a rather simple empirical performance index of egg production efficiency, I(E), was almost as accurate in predicting net income as a multiple regression-derived performance index.

Egg Quality in Gifu City, Japan

INTRODUCTIONTHE last 10 years have witnessed a very rapid rise in egg production in Japan. In 1957 there were an estimated 30 million laying hens. In 1967 this number had risen to 90 million. The Ministry of Agriculture and Forestry of the Japanese government estimated the 1967 per capita intake of eggs per day was 27.5 grams. This would be the equivalent of approximately 185 large eggs per year. Such a rapid expansion in production and consumption would imply many changes in marketing.Much of the breeding stock used in Japan for egg production originates in the United States and Canada. The feedstuffs used there come from many countries with the United States and Canada being major suppliers. Egg handling and processing equipment and supplies also come in part from outside Japan. Everyone connected with these aspects of the Japanese egg industry should be concerned about the level of…

Studies on the Dissolution of Zinc into Supplied Water from Zinc-coated Iron Pipes

It had been found that the water supplied in a newly-build school house in M District in Gifu City was a little astringent, and formed greese like membrane on standing, which became cloudy by boiling. The source water of the supplied water proved to contain much of erosive free carbonic acid, which cause the dissolution of Ca, Mg from asbestos pipe, and Zn from zinc coated iron pipe into the supplied water. This phenomenon has been observed for more than 3.5 years since the beginning of water supply. The influence of feeding mice and golden fishes by the supplied water on their growth and living time were also observed.

5007 市街地周辺部の農家の貸家経営について : 岐阜市の場合(住宅問題・都市計画)

5007 市街地周辺部の農家の貸家経営について : 岐阜市の場合(住宅問題・都市計画)

Observation of Air Pollution in the District of China Manufacturing. II : On the Fluorine Contents in Raw Materials of China and Fluorine in Air Determined by Alkaline Filter Paper Method.

It is reported that fluorine is emitted to the atmosphere from various industrial process such as the manufacturing of aluminium, clay bricks, phosphate fertilizers and steel. Fluorine concentration in air of china manufacturing area and in raw materials of china were measured. Alkaline paper method was applied for measuring fluorine in air, and modified distillation method was used for fluorine in raw materials of china. From the results of this investigation, it was shown that fluorine content in green body and glaze of china materials were 3.4-16.3mg/100g, and the content in manufacturing were less than 3mg/100g. More than 90% of fluorine in these raw materials was volatilized by firing in the process of china manufacturing, therefore it was supposed that measurable amounts of fluorine was emitted to the atmosphere in china manufacturing area. Fluorine values in the air in china manufacturing area were 3.1μg/d/100cm2 paper, and these vulues were 4 times as high as the values in Gifu city-commercial city. In the nearest observation point to china factories, the values were 20 times higher than to that in Gifu city. From these results, it was concluded that china manufacturing was the main source of fluorine emission.

Observation of Microearthquakes in Mino District in Gifu Prefecture, Central Japan.

Since 1956, observation of microearthquakes have been carried out at several stations in Mino area in Gifu Prefecture. The observation was continued for about three months at every station, except the Sinpukuzi station where the observation was made for more than one year. The ground unrest is about 10μ kines in velocity amplitude at all stations, and earthquakes having the magnitudes from -2 to 2 are observed. The frequency of occurrence of earthquake is about 8 per day and is almost constant throughout a year in the vicinity of Gifu City. The magnitude-frequency relation of these earthquakes is well consistent with the following relation which was obtained for moderate earthquakes around Gifu City: logn=-1.69+0.74(8-M) for r≤100km, dM=1, per year.These observations of microearthquakes were made by means of velocity seismographs. Using the maximum velocity amplitude and the hypocentral distances of earthquakes, the magnitudes of earthquake were determined by the following equation:M=1.25logV(kine)+2.5logr(km)+1.0, which is compatible with the Tsuboi's equation based on the maximum displacement amplitude and the epicentral distance. According to the results of simultaneous observation with the Wiechert's displacement seismograph, this equation is found to be useful also for determinig the M of bigger earthquakes. The energy E of each microearthquake was evaluated from its seismogram. The magnitude M(E) which is calculated with the Gutenberg-Richter's equation, M=(logE-11.8)/1.5, is consistent with the magnitude, M(υ, r) calculated by the above equation.The geographical distribution of microearthquakes was determined by simultaneous observation at three stations. Both P and S phases of the microearthquakes within a range of r≤100km around these three stations are clear and the accurate determination of the foci was possible. They occur at the depth of about 20km and 50-60km. The sequential occurrence is recognized.The geographical distribution of these microearthquakes is concentrated in the vicinity of the seismological stations. The fact is more clearly illustrated by the frequency curve of P-S interval time and that of magnitude. The smaller the magnitudes of group of the observed microearthquakes, the nearer is the location of their foci.

Litigations concerning to hisashi-tsuki (eaves-accessories)

In the rural community of Japan during the Tokugawa period, the social status of the farmers was subdivided into several classes according to the hereditary prestige of each family which was called kakaku (family status). The syoya (village headman) was usually elected from among the farmers of the upper kakaku. But in the district where the kakaku was adhered rigidly, the status of mura-yakunin (village official) as such did not mean that he was of the upper kakaku, and the kakaku was so important that the precedence at meetings was fixed with it.At that time there were two movements, opposed to each other, concerning to the kakaku. The one stressed that keeping to the kakaku was selfgoverning rules of the rural community; the other boosted for the possibilities of social mobility, so that the wealthy farmers might gain equal standings through removing restrictions caused by the kakaku.In Hino-shinden in the Mino country (now within the Gifu city), it was a prerogative of the farmers of the upper kakaku to fit up their houses with hisashi (eaves) accessories. Several documents are found, dated in the first half of the nineteenth century, which inform us about the concrete cases of litigations concerning to the hisashi accessories, for the farmers of the lower kakaku also became jealous to furnish with them.This article introduces such documents and refers to the procedures of those litigations.

岐阜市の蚊, ハエ駆除活動について (2. ハエ・カ駆除の実際, 第 10 回大会講演要旨)

岐阜市の蚊, ハエ駆除活動について (2. ハエ・カ駆除の実際, 第 10 回大会講演要旨)