581.5 SHUKLA, R . S . PLANT ECOLOGY & SOIL SCIENCE / / R . S . SHUKLA & P . S . CHANDEL. - 9TH ED. - DELHI: : SULTAN CHAND & CO.,, 2001. viii , 498 P.. : PAPER BACK : 115/- * ECOLOGY - PLANT. SOIL SCIENCE. * CHANDEL, P . S . * Title