Evaluation of Nutrient Requirements of Sweet Lupine in Bread Wheat-Sweet Lupine under Additive Design Intercropping System in Northwest Ethiopia

Table 1

Soil properties of the study sites before the experiment^a.

Soil properties	Adet		Debre Tabor		Method of soil analysis
	Value	Rating	Value	Rating
pH (H2O) 1 : 2.5	5.08	Moderately acidic^b	6.24	Slightly acidic^b	pH meter (H2O 1 : 2.5)
CEC (cmol(+) kg^−1)	38.28	High^c	42.73	Very high^c	Ammonium acetate method [24]
OC (%)	1.21	Very low^c	1.48	Very low^c	Walkley and Black method [25]
TN (%)	0.17	Low^c	0.16	Low^c	Micro-Kjeldahl method [26]
Ava. P (ppm)	3.89	Low^c	21.33	Low^c	Bray method [27]
Soil texture					Hydrometer method [28]
Sand (%)	55	—	56	—
Silt (%)	11	—	19	—
Clay (%)	36	—	25	—
Soil textural class	Sandy clay	Sandy clay^c	Sandy clay loam	Sandy clay loam^c

OC: organic carbon; TN: total nitrogen; Ava. P: available phosphorous; CEC: cation exchange capacity. ^aData were mean of 2 years (2019 and 2020). ^bPanda [5]. ^cLandon [29].