Question

13. Sandy soils are usually high in nutrients and hold water well for long periods, making them ideal for all plants without modification.
14._
_ Soil texture (sand, silt, clay proportions) is a key factor in determining how easy it is
for roots to grow.
15. Adding organic matter to a poor soil type (like heavy clay or loose sand) can improve root growth by improving drainage, aeration, and nutrient retention.

Answer 1

13. False — Sandy soils are usually low in nutrients and drain quickly; they do not hold water well for long periods. Corrected: "Sandy soils are typically low in nutrients and drain rapidly, so they often need organic matter and fertilizer to retain water and nutrients."

14. True — Soil texture (proportions of sand, silt and clay) strongly influences porosity, drainage, aeration and compaction, all of which affect how easily roots can grow.

15. True — Adding organic matter (compost, well‑rotted manure, leaf mold) improves heavy clay by loosening it and improving aeration/drainage, and improves sandy soil by increasing water‑ and nutrient‑holding capacity and cation exchange. (Incorporate organic matter into the topsoil or top 6–12 in for best results.)