3 sentences

1. 农民们正在田间忙着春耕。

   nóng​mín men zhèng​zài tián​jiān máng zhe chūn​gēng.

   The farmers are busy with spring plowing in the fields.

   Source: Dong Chinese Dictionary

2. 春耕时期，农民们正忙着采购农资。

   chūn​gēng shí​qī, nóng​mín men zhèng máng zhe cǎi​gòu nóng​zī.

   During the spring plowing season, farmers are busy purchasing agricultural supplies.

   Source: Dong Chinese Dictionary

3. 冬闲时节，农民们正忙着积肥，为春耕做准备。

   dōng​xián shí​jié, nóng​mín men zhèng máng zhe jī​féi, wèi chūn​gēng zuò zhǔn​bèi.

   During the winter slack season, farmers are busy collecting manure to prepare for spring plowing.

   Source: Dong Chinese Dictionary