| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a non-tilled direct sowing management system, etc., by which an agricultural work schedule can be determined without applying the intuition and experience of farmers in rice non-tilled direct sowing. <P>SOLUTION: In a region/variety profile table 11 (X city-rice variety A), a daily mean temperature (mean temperature of 24 temperatures on the hour) of the X city in a normal year, an effective temperature (daily mean temperature-10°C) and a DVR value (development rate; growth rate of rice (rice variety A) to daily mean temperature) are described. When a scheduled day for beginning of irrigation is inputted in the non-tilled direct sowing system 1, a growth rate accumulating part 104 sets an assumed sowing date and accumulates the DVR value of rice to be sown on the assumed sowing date. A foliar age calculating part 106 calculates the foliar age (calculated with integrated value of effective temperature as variable) of rice that germinates on the assumed germination scheduled date (date when DVR integrated value becomes 1) and defines a date when a foliar age becomes 3.5 leaves as an assumed suitable beginning of irrigation time. The above processing is repeated, and an assumed sowing date when the assumed suitable beginning of irrigation time becomes the closest to a beginning of irrigation scheduled date is determined as a sowing date. <P>COPYRIGHT: (C)2004,JPO</p> |
