000 00344nam a2200085Ia 4500
008 250606s9999 xx 000 0 und d
245 0 _aGPS and GIS based model soil fertility map for precise fertilizer recommendations to the farmers of Kerala
260 _aVellanikkara
_bCollege of Horticulture, Kerala Agriculture University
_c2004
942 _cREP
999 _c294490
_d294490