Field evaluation of pelletised calcined and insoluble residue of Christmas Island ‘C’ phosphates

摘要: Abstract Two pelletised fertilisers, calcined and the alkali insoluble residues of Christmas Island ‘C’ phosphate (CICP), were compared with powdered materials in a pasture mowing trial. The pelletising process used 10% non-swelling New Zealand bentonite clay to bind ground materials. performed well under field conditions. Over 2 years general trend was for produce slightly more raise Olsen P soil levels corresponding products.