Effect of NPS and Zinc Fertilizer Rates on Growth and Yield of Onion (Allium cepa L.) at Shewa Robit, North Shewa, Ethiopia

Table 1

Physicochemical characteristics of soil in the experimental site before planting.

Soil properties	Value	Rating	Source
pH (1 : 2.5)	7.6	Slightly alkaline	[23]
Electrical conductivity (d·S·m^−1)	0.44	Nonsaline	[24]
Organic matter (%)	0.15	Very low	[25]
Total nitrogen (%)	0.03	Low	[24]
Exchangeable K (c mol(+)/kg)	1.5	Sufficient	[26]
Available P (ppm)	15	Marginal	[27]
Available S (ppm)	23	Medium	[28]
Zn (ppm)	0.48	Low	[29]
Particle size distribution
Sand (%)	40.2
Silt (%)	33.07
Clay (%)	26.67
Textural class	Sandy loam		[24]