an act of sowing seeds in spring 春に種子を蒔くこと - EDR日英対訳辞書
It is preferable to suppress sprouting and growth of spring weeds by scattering a carbohydrate material containing much starch or an organic material containing much saponin on the rice field in an irrigation condition at the same time of direct sowing of rice plant seeds or before and after the direct sowing. 稲の種子の直播きと同時に、或いはこの直播きの前後に、入水状態の水田に澱粉含有量の多い炭水化物材料又はサポニン含有量の多い有機物を散布して春期雑草の発芽及び生育を抑制するのが好ましい。 - 特許庁
The method for producing the seeds includes sowing seeds of biennial plants in a paper cylinder followed by vernalizing so as to obtain paper cylinder seedlings, fix planting the paper cylinder seedlings in a field in spring followed by developing flower stalks and fructifying, and gathering the seeds. 2年生植物の種を紙筒内に播種し、春化処理をして紙筒苗を得、該紙筒苗を春に圃場に定植することにより、抽苔、結実させて採種する。 - 特許庁