Show trees get their food after testa by tle isca york col lege of agriculture it appears tut trees are not fed the ne cesari salts and sugars by the water alch Is found in the woody part of the trunk instead there are extend ing through the bark tissues through nelch alie food Is carried from the ground and from the leases by mil lions of microscopic organisms these tubes are filled rith a living substance circulates up and down the tree in an endless stream downnard aliey carry by lie lunes and on the return trip they bring from the earth the by the roots |