水土保持

shuǐtǔbǎochí
soil conservation

CEDICT

  1. (agriculture) water and soil conservancy
  2. water and soil conservancy

Wiktionary

为求土地安定，防止土壤受侵蚀，并保持其生产力的一种措施。如造林、修建梯田、植草等。

重編國語辭典

Entry Composition

1 水土 shuǐtǔ
  1. water and soil
  2. surface water
  3. natural environment (extended meaning)
  4. climate
2 保持 bǎochí
  1. to keep
  2. to maintain
  3. to hold
  4. to preserve