Show when to fertilize grapes fertilizers particularly nitrogenous fertilizers increased the yield stimulated wood growth and improved the quality of the fruit in a 10 year test with grapes made by prof F E glad win horticulturist in charge of the vineyard laboratory maintained at N Y by the state expert ment station comparisons we were remade made of complete fertilizers and of various combinations of nitrogen potassium slum and phosphorus wherever fertilizers were used marked benefits were oil ob served although nitrogen proved the most of the three elements |