Mechanical rice planting

...However, because young seedlings take a long time to grow in the paddy field, they must be planted earlier, making it impossible to plant second crops, and in northern Japan they are more likely to be damaged by low temperatures. For these reasons, efforts were made to extend the number of days the seedlings grow in the nursery boxes, and the medium-sized seedling rice planting method, which uses seedlings with four or five leaves, was born. However, problems remain compared to planting mature seedlings by hand, and there is a desire to establish a method of mechanically planting mature seedlings. The rice planting method is as follows. ...

*Some of the terminology used in reference to "mechanical rice planting" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…しかし，稚苗は水田で生育する期間が長くなるために，植付け時期が早くなり裏作が作付けできなくなること，北日本では低温の被害を受ける可能性が高いことなどから，育苗箱中の生育日数を長くする努力がされ，4～5枚の葉をもつ中苗田植方式が生まれた。しかし，成苗の手植えに比べるとまだ問題が残っており，成苗機械田植方式の確立が望まれている。　田植の方法は次のとおりである。…

※「機械田植」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報