J.M. Abdulla, S.P. Rose, V. Pirgozliev*   The National Institute of Poultry Husbandry, Harper Adams University, Shropshire, TF10 8NB, UK (Manuscript received 23 November 2017; accepted for publication 31 January 2018)   Abstract. Effects of exogenous xylanase on N-corrected dieta

D. Draganova*, I. Valcheva, Y. Kuzmanova, M. Naydenov Department of Microbiology and Ecological Biotechnologies, Faculty of Plant Protection and Agroecology, Agricultural University, 4000 Plovdiv, Bulgaria (Manuscript received 14 June 2017; accepted for publication 8 August 2017) Abst