http://www.durgan.org/URL/?VBEJB 25 May 2010 Hilling Potatoes
Potatoes were fertilized with compost between the plants in the small trench where they were planted. The soil between the rows was rototilled to loosen the soil and the surface area was smoothed over. The seed potato is covered with about six inches of soil. This will be the first and final hilling. After the next heavy rainfall the ground area will be covered about threes inches deep with wood chip mulch to retain moisture. Each potato plant was marked with a stake, since the vegetation is gone when digging and this will identify the center of the tubers. There are five varieties.Varieties are; Russian Blue, Agria, Viking, Alaskan Sweetheart, Chieftain.
This is a bit of an experiment with hilling and the addition of mulch. The new tubers will be weighed to ascertain the production per plant.
For reference here is how a potato plant grows.
http://www.durgan.org/URL/?ZELNG 21 August 2009 How a Potato Plant Grows The pictures literally speak for themselves. Clearly there is no advantage in carrying out excessive hilling when growing potatoes. The purpose of hilling is to insure the tubers are covered. Solanine is produced if potatoes are exposed to light. This is harmful if ingested, and is indicated by the tuber green color. The green is not solanine but chlorophyll.