Starch-Grafted Sodium Alginate-Modified Clay Composites as Environmentally Controlled-Release Materials for NPK Fertilizer

Table 1

Summary of classification test results.

Sample ID	Specific Gravity	Atterberg limits (%)			Particle size distribution (%)				Soil type
		LL	PL	PI	Clay	Silt	Sand	Gravel
Afari	2.29	60.20	24.00	36.20	22.00	38.00	40.00	0.00	Clayey, silty, and sand

LL: liquid limit, PL: plastic limit, and PI: plasticity index.