yóu / yú / tǔ / céng / qiāo / bó / nóng / mín / zhǐ / néng / xuǎn / zé / nài / hàn / de / zuò / wù由于土层硗薄,农民只能选择耐旱的作物。Because the soil layer is thin and barren, farmers can only choose drought-resistant crops.