Abstract:
Effects of nitrogen (N) and potassium (K) fertilization rates on the yield and quality of two potato
cultivars, Asterix and Courage were conducted. The treatment combination of N2K2 (N2: 140 kg
ha−1 and K2: 152 kg ha−1) had the highest total yield (31.38 and 22.51 t ha-1), marketable tuber
yield (29.08 and 20.49 t ha-1) and chips potato yield (36.63 and 36.96%) of the 18 treatment
combinations for Asterix and Courage cultivar, respectively. The treatment combination of N2K2
had also the highest specific gravity (1.07 and 1.17 gcm-3), dry matter (22.65 and 22.77%), firmness
(45.13 and 42.92 N), and lowest total soluble solid (4.30 and 4.23 oBrix) in both the cultivars,
whereas the colour of the chips revealed the least crispness (0.15 and 0.17 N). In order to enhance
potato processing quality without reducing production, a lower N and higher K treatment
combination may be employed.
