It has gone from a traditional activity that takes place after crops are harvested to become Senegal's national sport.

它已经从收割庄稼后进行的传统活动转变为塞内加尔的全国性运动。

The US Department of Agriculture this summer has encouraged American farmers to grow one crop after the other on one piece of land to combat a potential food shortage.

美国农业部今年夏天呼吁农民在同一土地上连续种植两种作物，以应对潜在的粮食短缺危机。