2. Mustard. Wait a minute. ) belongs to Brassicaceae, Brassica and Panicum, with a height of 150 cm. Its young stems and leaves are prickly and spicy. Stem erect, leaf blade stalk with lobules; The lower leaves of the stem are small, with serrated or serrated edges, and the upper leaves of the stem are narrow and lanceolate, with inconspicuous sparse teeth or entire edges. Racemes are terminal and extend after flowering; Flowers yellow, sepals pale yellow, oblong or oval, erect; Petals obovate, silique linear, seeds spherical, purplish brown. It blooms in March-May and bears fruit in May-June.

3. Planting: Artificial cultivation includes open-air cultivation and protected cultivation. The Yangtze River and Huanghuai areas can be cultivated in the open field in spring and autumn, mainly in autumn. Sowing can be carried out from late July to 10, and harvesting can be finished from mid-September to March of the following year, but the highest yield can be achieved by sowing in August.

4, soil preparation: mustard seeds are small, it is necessary to level the land, fine, pick out weeds and garbage, but also do deep ditch and high ridge irrigation. The boundary width is generally 2.5m (even groove).

5. Sowing: Sowing time: spring ploughing in late February; Summer cultivation is from early July to late August; Autumn ploughing is mainly from early September to early June of 10.

6. Sowing amount: 667m2 spring sowing 1.5 ~ 2kg, 3 ~ 4kg in summer sowing and 2 ~ 3kg in autumn sowing.