Show care of orchard fertilization of the orchard instead of the trees would do much toward maintaining good orchard sites through succeeding generations of trees says grover F brown agronomist in the northeast region of the soil conservation service nitrogen has been the chief plant food used in orchards with the result that cover crops often lack lime phosphorus and potash tests show says brown that although trees in orchards may not respond to phosphorus and potash the cover crops frequently do peed need these tw two elements |