Table 6. Physico-chemical characteristics of the soil prior to sowing.

Parameter	Unit	Pot trials	Field trial I	Field trial II	Field trial III	Field trial IV
ECe	dS m-1	1.9	2.1	1.9	1.9	1.6
pH	---	7.8	8.1	7.9	7.8	7.7
Organic matter	%	0.43	0.41	0.39	0.44	0.48
N	%	0.058	0.048	0.043	0.051	0.056
P	mg kg-1	4.0	3.7	4.2	4.1	5.0
K	mg kg-1	81	63	71	73	65
Saturation percentage	%	35	35	36	36	34
Textural class	---	Sandy loam	Sandy loam	Sandy loam	Sandy loam	Sandy loam