Saloom, Mohammed Obaid. “EFFECT OF APPLICATION METHODS OF THE HUMIC ACID AND PHOSPHORUS LEVELS AND SOME GROWTH PROPERTIES AND YIELD OF BARLEY (Hordeum Vulgare L) . ”. Diyala Agricultural Sciences Journal , vol. 8, no. 1, June 2016, pp. 92-104, https://journal.djas.uodiyala.edu.iq/index.php/dasj/article/view/1330.