00367nam a2200109Ia 4500008004100000100002600041245009700067260005200164300000800216500001800224700001500242220217s9999    xx            000 0 und d  aNageswara Rao, D.V.K. 0aProductivity classification of soils under rubber (Hevea brasiliensis Muell. Arg.) in Kerala  bKerala Agricultural Universitya Thrissurc2000  a166  aCourse: Ph. D  aDr AI Jose