COLLEGE STATION, Texas — (AP) - The Texas Forest Service has released a free video to help residents know how much and how often to water their drought-stricken trees.

Spokeswoman Holly Huffman says the video responds to calls from homeowners worried about their wilting and dying trees.

Huffman says the best thing people can do during one of the worst droughts in Texas history is to "water, water, water" -- deeply and weekly.

The video suggests pushing a long screwdriver into the ground.

If it can't go six to eight inches into the earth, it's time to  water again.

TFS urban forestry manager John Giedraitis says trees boost property values, shade homes, cut electric bills and clean the air.