Growth and seasonal nutrient concentration, content, and dry matter acumulation for three local clones of poplar (Populus nigra IRQ-1, Populus nigra "Babylon" IRQ-6 and Populus X euramericana IRQ-19) were studied bet\veen February and October, 1988 in Ninevah Plantation. Three levels of N, P, K fertilizers 0,18 and 36 gms/seedling were applied twice, at the beginnnig of May and August to the seedlings raised by using stem and root cuttings. The results sho\ved that root cuttings can be considered as sources for establishing plantations. Clonal diffcrences in response to N, P, K fertilizers \vere evident. Populus nigra "Babylon" IRQ-6 respond signficantly to the application of N, P, K at early May. Regression of nutrient content and leaf dry \veight indicate high correlations, this relation could be used for predicting the amount of nutrient elements removcd with dry matter during harvesting.