00461nam a2200181Ia 4500008004100000041001200041082001000053082001200063100001700075100001100092245005300103260001400156260004400170260000900214300001400223365002500237650001700262150909s9999    xx            000 0 und d  aEnglish  a631.4  bGRE/PPO  aGrewal J S    eAuthor  aPottassium and ammonium fixation in Indian soils  aNew Delhi  bIndian Council of Agricultural research  c1979  a75  Pages  aRs.8.00               aSoil science