Mineral Nutrition of Cacao (Theobroma cacao L. ) IV-Effects of Nitrate and Urea Nitrogen on Deficiency Symptoms of Phosphorus, Potassium, Calcium and Magnesium in Sand Culture. ta [Internet]. 1965 Jan. 30 [cited 2025 Apr. 26];42(1). Available from: https://journals.sta.uwi.edu/ojs/index.php/ta/article/view/3793