a. bartkowiak department of soil science and soil protection, faculty of agriculture and biotechnology, utp university of science and technology in bydgoszcz, bernardyńska 6 st., 85-029 bydgoszcz j. lemanowicz sub-department of biochemistry, faculty of agriculture and biotechnology, utp university of science and technology in bydgoszcz, 85-029 bydgoszcz, bernardyńska 6 st., poland a. siwik-ziomek sub-department of biochemistry, faculty of agriculture and biotechnology, utp university of science and technology in bydgoszcz, 85-029 bydgoszcz, bernardyńska 6 st., poland

Gausul Azam, Mahmud Hassan, S. M. Islam, Syed Rahman,