Booker tropical soil manual :  a handbook for soil survey and agricultural land evaluation in the tropics and subtropics / 
edited by J.R. Landon ; principal contributors C. Berryman ... (et al.) 
 - London :  Booker Agriculture International,  1984 
 - xiv, 450 p. :  ill. ;  31 cm. 
<br/><br/>p. 411-434 
<br/><br/><label>ISBN: </label>0582460492 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soils--Tropics--Handbooks, manuals, etc.<br/>Soils--Survey