00695cam a22002537a 4500003000500000005001700005008004100022010001000063011001000073020001500083035001100098040000900109082002100118110000800139245010100147260002400248300001200272410000800284490005100292650002400343700001500367810000800382830005100390CHAP20220817044005.0050209s2003    it      rn    00110 eng d  a89524  a90496  a9251050384  a101052  cCHAP04a631.8bF24y v.142 aFAO10aAssessment of soil nutrient balance :bapproaches and methodologiesc/ by R. N. Roy (and others)  aRome :bFAO,c2003.  a87 p. :20aFAO 0aFAO. Fertilizantes y nutrición vegetalv; 1414aSuelosxFertilidad.0 aRoy, R. N.0 aFAO00aFAO. Fertilizantes y nutrición vegetalv; 14