@article{cummings_xie_1995, title={EFFECT OF SOIL-PH AND NITROGEN-SOURCE ON THE NUTRIENT STATUS IN PEACH .2. MICRONUTRIENTS}, volume={18}, ISSN={["1532-4087"]}, DOI={10.1080/01904169509364922}, abstractNote={Abstract The concentration of aluminum (Al), manganese (Mn), iron (Fe), zinc (Zn), and copper (Cu) in leaves, shoots, trunks, and roots, and the content of plant‐available Mn and Al in soil was examined after 13‐year treatments of soil pH and nitrogen (N) source in a peach orchard of North Carolina. Raising soil pH by liming tended to reduce soil Al content, but had no effect on soil Mn. Tissue Al and Mn level was decreased in high pH treatment. Poultry manure application resulted in the highest soil Mn content but the lowest soil Al. In comparison with calcium nitrate [Ca(NO3)2], ammonium sulfate [(NH4)2SO4] increased Al availability in soil while had little effect on soil Mn. Acid‐forming N, especially (NH4)2SO4, increased the concentration of tissue Al, Mn, Zn, and Fe. The plants treated with various basic N materials similarly contained lower levels of Al or Mn. Manure treatment resulted in high tissue Cu and Zn but low tissue Fe levels. Tissue Zn was low when mineral N sources containing calcium (Ca)...}, number={3}, journal={JOURNAL OF PLANT NUTRITION}, author={CUMMINGS, GA and XIE, HS}, year={1995}, pages={553–562} }
 @article{cummings_1989, title={Factors affecting foliar nutrient levels and their relationship to peach yield}, DOI={10.17660/actahortic.1989.254.45}, number={254}, journal={Acta Horticulturae}, author={Cummings, G. A.}, year={1989}, pages={275} }
 @article{cummings_lilly_1984, title={Soil pH rate for fruit yield and elemental concentration of muscadine grapes}, volume={19}, number={6}, journal={HortScience}, author={Cummings, G. A. and Lilly, P.}, year={1984}, pages={831} }
 @article{cummings_1983, title={Effects of soil pH, phosphorus rates, deep tillage practices, and clay additions on peach tree performance in deep sandy soils of North Carolina}, volume={108}, number={4}, journal={Journal of the American Society for Horticultural Science}, author={Cummings, G. A.}, year={1983}, pages={586} }
 @article{cummings_maddox_1983, title={Fertilizer, lime and tillage program aimed at increasing peach yield and tree life}, volume={34}, number={10}, journal={Goodfruit Grower}, author={Cummings, G. A. and Maddox, S. J.}, year={1983}, pages={5} }
 @article{cummings_mainland_lilly_1981, title={Influence of soil pH, sulfur, and sawdust on rabbiteye blueberry survival, growth and yield}, volume={106}, number={6}, journal={Journal of the American Society for Horticultural Science}, author={Cummings, G. A. and Mainland, C. M. and Lilly, J. P.}, year={1981}, pages={783} }
 @article{cummings_lilly_1980, title={Influence of fertilizer and lime rates on nutrient concentration in highbush blueberry fruit}, volume={15}, number={6}, journal={HortScience}, author={Cummings, G. A. and Lilly, J. P.}, year={1980}, pages={752} }
 @article{cummings_1978, title={Plant and soil effects of fertilizer and lime applied to highbush blueberries}, volume={103}, number={3}, journal={Journal of the American Society for Horticultural Science}, author={Cummings, G. A.}, year={1978}, pages={302} }
 @article{cummings_1973, title={The distribution of elements in 'Elberta' peach tree tissues and the influence of potassium and magnesium fertilization}, volume={98}, number={5}, journal={Journal of the American Society for Horticultural Science}, author={Cummings, G. A.}, year={1973}, pages={474} }
 @article{cummings_bickford_nelson_1971, title={Fertilizer and lime rates influence highbush blueberry growth and foliar elemental content during establishment}, volume={96}, number={2}, journal={Journal of the American Society for Horticultural Science}, author={Cummings, G. and Bickford, C. and Nelson, L.}, year={1971}, pages={184} }