Potato (Solanum tuberosum L.) Growth and Quality as Influenced by Inorganic Fertilizer Rates in Northwestern Ethiopia

Table 5

Phosphorus and potassium use efficiency of potato crop (Belete var.) for the interaction effects of phosphorus and potassium fertilizers.

Treatments (P2O5 × K2O)	Total yield (ton/ha^−1)	Agronomic efficiency (kg/kg^−1)	Apparent recovery efficiency (%)	Physiological efficiency (kg/kg^−1)
T1-0 × 0	21.55	—	—	—
T2-0 × 100	22.87	13.2	0.01	2.13
T3-0 × 200	25.38	19.15	0.01	2.35
T4-0 × 300	22.41	2.87	0.01	0.50
T5-34.5 × 0	20.81	−21.45	0.00	−14.80
T6-34.5 × 100	39.22	131.38	0.01	27.18
T7-34.5 × 200	49.14	117.65	0.01	15.95
T8-34.5 × 300	40.59	56.92	0.01	10.88
T9-69 × 0	26.13	66.38	0.00	35.23
T10-69 × 100	34.46	76.39	0.00	17.45
T11-69 × 200	43.08	80.04	0.01	11.64
T12-69 × 300	38.76	46.64	0.01	9.35