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<h1><font face="Arial, Helvetica, sans-serif">Management of Indian Red and Lateritic
soils in relation to Potassium Dynamics</font></h1>
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<td><img src="../../image/ppic.gif" width="65" height="93" hspace="5"></td>
<td>KAUSHIK MAJUMDAR<br>
Potash & Phosphate Institute of Canada - India Programme Bd-42, Sector-1,
Salt Lake City, Calcutta</td>
<td><img src="../../image/pri.gif" width="54" height="52" hspace="5"></td>
<td>S.K. BANSAL<br>
Potash Research Institute of India Sector-19, Dundahera Gurgaon, Haryana</td>
<td>SHAHID UMAR<br>
Dept. of Botany, F/O Science Hamdard University New Delhi</td>
<td><img src="../../image/k-gr.gif" width="83" height="66" align="left" hspace="5"><font face="Arial, Helvetica, sans-serif" color="#009900" size="7"><b>IPI</b></font></td>
<td>PATRICIA IMAS<br>
International Potash Institute c/o DSW, POB 75 Beer Sheva, Israel</td>
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</table>
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<h2>Background:</h2>
<ul>
<li>Red and laterite soils constitute 34.5 and 1.3 % of the geographical area
in Southern India, covering 31.9 and 1.2 million Has. of agriculturally important
soils, respectively</li>
<li>Information on fixation and release of K in these soils is meagre because
of dominance of kaolinitic minerals which have negligible influence on K dynamics</li>
<li>Some studies have documented the K fixation potential of kaolinite (<i>Barber,
1979; Jensen, 1973</i>), which affects the K dynamics in soil and its availability
to plants</li>
</ul>
<h2>Objectives:</h2>
<ul>
<li> To study the release and retention behaviour of potassium in some bench-mark
red and laterite soils of India for better potassium fertilizer management
leading to sustainable crop production</li>
</ul>
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