The communication network technology has recently shown rapid advancement. Under advanced network environment, agricultural organizations such as farmers associations can easily manage farmers' data and integrate internal information and external information, utilizing networks. In this study, a new Web-base accounting system (Web agricultural accounting system) was developed.
The new system is based on the WWW functions so that inexperienced farmers can always use the latest version of the accounting system, using the Internet browsers on their personal computers. Farmers do not need to possess stand-alone accounting software packages by themselves anymore.
The system will bring an easy-maintenance agricultural accounting system to agricultural organizations. The integration of this system with any other information systems such as production control information system is also highly expected.

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This paper introduced an effective nationwide computer network system in the field of agricultural extension service in Japan. The network system was started in 1988 experimentally with a bulletin board and an e-mail system.
After that, a database system and a facsimile system were added and a part of the system was opened to farmers. In addition, the system made it possible to provide local information in each area. Therefore Fukui prefecture made its own bulletin boards to provide local technical information. And it has made possible speedy information exchange among extension centers.
From these progress and the present situation, the author pointed that importance of computer literacy, network activities, improvement of the network system and information disclosure are very important to make more useful network.

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Due to a periodic attack of “Yamase”, a cool weather and bringing crop damage, in southeast area of Aomori Prefecture, the farmers organized the 14 JAs (Japan Agricultural Cooperatives) at Kamikita-gun, Towada-shi, and Misawa-shi. They made the Agricultural Promoting Association in 1994, and built the agricultural information network system for providing information on weather, markets, production technologies, and workers to 4,500 farms to help their business. In this study, uses of the information were investigated. To assess weather resources of the area, 1 km square mesh climatic charts were obtained using weather data from 28 AMeDASs (Automated Meteorological Data Acquisition Systems). More than 90% farms used the information from once to forth a week, especially weather information was most interesting. From the mesh climatic chart of daily air temperature during Jun and Aug 1996, a southern part was relatively higher than that of North, divided in two parts at 40° 40'30''. Mountainous area of West and North was below 18°C. At Yamase weather, a cool air below 13.8°C covered almost flat area below 93 m in height, and warm air above 14°C moved to mountainous area of West and North. Lowest temperature below 13°C was observed along the Mutsu Bay coast and around Shitinohe-machi.

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We observed the local weather and rice crop development on three fields in Fukui during 1997. The developmental rates were notified to be different in each field under the similar climate and the well-managed fertilizer and irrigation. The different soil temperature and daylength were considered to affect the developmental stage, and thus we analyzed the observed weather and crop data. As the results, firstly it was found the accumulated daily soil temperature showed the significant linear relation with the leaf age which could be an index of developmental stage. Secondly, the logarithmic regression between the leaf age and DVI was analyzed with high level of the r-square 0.97 by the use of soil temperature in stead of air temperature in calculating DVI. Thirdly, it was shown that the soil temperature-based DVI using daylength calculated from solar radiation predicts well the developmental stages such as the panicle formation and heading, and that the DVI explains the different developmental rate observed in our three fields.

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