Abstract
Rooted cuttings of Dracaena deremensis 'Warneckii,' Engler were grown at five N levels (0, 64, 120, 192 and 256 p/m) and six shade intensities (full sunlight, 47, 51, 63, 76 and 92% actual shade). The number of leaves, and length and weight of plants were significantly affected by N levels. The fitting of the yield-nutrient relationship curve Y = A/1 + B(C-X)2 revealed maximum expected values at N levels of 164 to 210 p/m depending on the shade intensity. An increase in N increased leaf N and decreased K, especially at the full sunlight and 47% shade levels. Leaf K content tended to level off at 64 p/m of N application at shade levels over 47%. P and Fe content were not affected markedly by N levels. At 92% shade appearance of the plants was superior to that at other shade levels.