Effect of Mineral Nitrogen, Phosphorus, and Potassium Fertilizers on the Productivity of Faba Bean (Vicia faba L.) in Acidic Soils of Wolaita Zone, Southern Ethiopia

Table 3

Mean square values of the interaction effect of mineral N, P, and K and the effect of year on growth parameters of faba bean in Sodo Zuria District, southern Ethiopia, in 2019 and 2020 cropping seasons.

Source of variations	Mean squares
	Degrees of freedom	Plant height (cm)	Stem girth (mm)	Logging (%)	NBPP
Y	1	1,158.56	1.08^ns	3,468.89	19.76
Y (R)	4	8.05^ns	0.58^ns	48.71^ns	0.61^ns
N rate	2	400.02	21.89	289.75	15.99
P rate	2	413.32	28.94	485.79	8.10
K rate	2	897.14	76.82	9,621.04	28.85
N rate × P rate	4	40.04^ns	12.11	481.91	1.67
N rate × K rate	4	38.10^ns	12.92	153.98	3.65
P rate × K rate	4	421.45	7.30	131.01	1.43
N rate × P rate × K rate	8	100.92	7.97	170.61	5.37
N rate × Y	2	12.85^ns	1.39^ns	59.72^ns	0.29^ns
P rate × Y	2	56.46^ns	1.18^ns	22.27^ns	1.62^ns
K rate × Y	2	60.22^ns	1.17^ns	89.98	0.59^ns
N rate × P rate × Y	4	10.23^ns	0.07^ns	38.27^ns	0.28^ns
N rate × K rate × Y	4	8.92^ns	0.045^ns	17.20^ns	0.14^ns
P rate × K rate × Y	4	44.99^ns	0.29^ns	15.97^ns	0.62^ns
N rate × P rate × K rate × Y	8	11.92^ns	0.42^ns	23.39^ns	0.59^ns
Error	104	38.30	0.67	21.80	0.41
CV (%)		5.11	13.91	17.58	16.35

Note: ns = not significant; ^,, and significant at  ≤ 0.05, 0.01, and 0.001, respectively; Y = year, R = replication; PH, plant height; ST, stem thickness; and NBPP, number of branches per plant.