5.1.13—Texture affects productivity

Texture creates trade-offs: sand drains and aerates quickly, clay retains water and nutrients, and loam often balances both.

Clay’s surface area can retain ions and water but may drain slowly; sand can lose nutrients and dry rapidly. Humus and structure modify the prediction.

A sandy field may need frequent irrigation and nutrient management; a clay field may waterlog after heavy rain but retain more nutrients.

With comparable structure and compaction, sand-rich soil usually infiltrates water faster; clay-rich soil usually retains more water and nutrients but may drain and aerate poorly.

‘Clay is fertile’ is not universal; retention can coexist with poor aeration or waterlogging.