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

Table 6

Nutrient use efficiency of potato crops for the main effects of phosphorus and potassium fertilizers.

Phosphorus fertilizer treatment (P 2 O 5 )	Total yield (ton/ha ^−1 )	Agronomic efficiency (kg/kg ^−1 )	Apparent recovery efficiency (%)	Physiological efficiency (kg/kg ^−1 )
0	23.06	—	—	—
34.5	37.45	0.42	0.0013	319.78
69	35.61	0.18	0.0021	86.55
Potassium fertilizer treatment (K 2 O)	Total yield (ton/ha ^−1 )	Agronomic efficiency (kg/kg ^−1 )	Apparent recovery efficiency (%)	Physiological efficiency (kg/kg ^−1 )
0	22.84	—	—	—
100	32.19	0.09	0.030	311.63
200	39.20	0.08	0.002	44.23
300	33.93	0.04	0.002	19.46