What is a heap of potatoes stored under straw?

This sounds like a description of a traditional way of storing potatoes called a "potato clamp" or "potato pit". Here's why:

* Heap of potatoes: This indicates a large quantity of potatoes stored together.

* Stored under straw: The straw serves as insulation to protect the potatoes from freezing temperatures during the winter.

How a potato clamp works:

1. Digging the pit: A shallow pit is dug in the ground, typically with a sloping side for drainage.

2. Layering: Potatoes are piled into the pit, alternating layers of potatoes with straw. The straw acts as a cushion, absorbs moisture, and provides insulation.

3. Covering: The entire pile is then covered with a thick layer of straw, soil, or a combination of both. This creates a seal that helps regulate temperature and humidity.

Potato clamps are a low-tech and effective way to store potatoes for long periods, particularly in areas with cold winters.