1. Adams P, Massey DM. Nutrient uptake by tomatoes from recirculating solutions. In: Abstracts of the 6rd international congress on soilless culture, International Society for Soilless, Wageningen Culture; 1984. p. 71.
2. Adriano DC, Paulsen GM, Murphy LS. Phosphorus-iron and phosphorus-zinc relationships in corn seedlings as affected by mineral nutrition. Agron J. 1971;63:56–9. https://doi.org/10.2134/agronj1971.00021962006300010013x.
3. Bitzer M. No-till corn highest yield with nitrogen and potassium. Better Crops. 1982;67(19)
4. Blevins DG. Role of potassium in protein metabolism in plants. In: Mund-Son RD, editor. Potassium in agriculture. ASA/CSSA/SSSA. Madison; 1985. p. 413–24.
5. Dibb DW, Thompson WR Jr. Interactions of potassium with other nutrients. In: Abstracts of the international symposium of potassium in agriculture. Atlanta: American Society of Agronomy; 1985. p. 515.