Ammonia Volatilization from Urea-Application Influenced Germination and Early Seedling Growth of Dry Direct-Seeded Rice

Table 1

Chemical and physical properties of the soils used in Petri dish incubation and field experiments.

Parameter	Petri dish experiment			Field experiment	Ave. S.E
	Soil I	Soil II	Soil III	Soil IV
pH	4.8	7.3	7.9	6.5	0.02
Organic C (g/kg)	10.5	10.2	7.0	16.2	0.13
Total N (g/kg)	1.35	1.24	1.02	1.98	0.015
Olsen P (mg/kg)	8.4	24.0	9.7	18.3	0.31
Available K (mg/kg)	89	150	108	62	0.2
CEC (cmolc/kg)	8.5	11.0	9.3	49.9	0.18
Clay (%)	23	30	17	10	0.95
Silt (%)	74	46	70	64	0.88
Sand (%)	3	24	13	26	0.55

Soil I, II, and III were collected from fields where tea plant, wheat, and vegetables were grown, respectively.
Soil IV was the field experiment soil in this study.