Soil retaining terraces and contoured plowing are examples of conservation agriculture practices.

Here's why:

* Soil retaining terraces: These are built across slopes to slow down the flow of water and reduce soil erosion.

* Contoured plowing: This involves plowing along the contours of the land, creating a series of ridges and furrows that help to slow down water runoff and prevent soil erosion.

These practices are specifically designed to conserve soil, reduce erosion, and improve water management in agricultural fields.