As sweet as dandelion wine is this calendar of the seasons on an old farm at the edge of the Adirondacks. The Crowells, husband and wife, are both biologists and knowledgeable about the care of pumpkin and squash and they belong quite unabashedly to that proliferating species ""nouveau rural""; each day in the meadows and barnyards brings its own dappled rewards. To read their celebrations you'd never know that raising heifers and chopping wood is backbreaking labor. And somehow Mrs. Crowell manages to render all those pastoral splashes of color and the aroma of the garden fragrant with camomile and mint without the cloying sentimentality of most such outdoor idylls. Mrs. Crowell offers a handful of recipes for such country cupboard favorites as mince pie and blackberry brandy, and her own drawings of the variegated flowers and animal life she so evidently loves will festoon the finished volume.