Encapsulated Urea-Kaolinite Nanocomposite for Controlled Release Fertilizer Formulations

Table 3

Chemical composition of the raw materials.

Sample	Oxide composition
	SiO2	Al2O3	Na2O	MgO	SO3	Cl	K2O	CaO	TiO2	Cr2O3	MnO	Fe2O3	LOI
Pugu kaolin	63.64	31.43	0.43	0.16	0.25	0.76	1.39	0.06	0.8	0.03	0.01	1.01	0.03
Beneficiated kaolin	54.99	40.2	0.09	0.13	0.08	0.04	0.96	0.04	1.02	0.04	0.01	2	0.4