(iii) Tuber yield/plot (kg)
A trend of yield increment was noticed among the irrigated treatments
with the increasing number of irrigation. Statistically the highest yield/plot
(34.88kg) was obtained by I4 with 5-rounds irrigation and the lowest (25.03kg) by I1
with 2-rounds irrigation. The non-irrigated treatment produced statistically the
lowest (12.03kg) tuber yield/plot as compared with irrigated ones. The results
obtained are in good agreement with Khalak and Kunaraswamy (1992) who
observed that tubers yield along with growth attributes of potato increased with
the increase of frequency of irrigation. They found highest yield at IW/CPE of 1.00
with 5-rounds irrigation. The results showed that tuber yield was increased
progressively with the frequency of irrigation. This is also in conformity with the
findings by Sharma et al. (1993).The two cultivars Binella and Heera which were
statistically identical differed significantly with cultivars Chamak and Cardinal
which produced statistically the highest (28.81kg) and lowest (25.15kg) tuber yield
/plot respectively (Table 2)
Although the interaction effect of irrigation and cultivars did not have
significant influence on tuber yield/plot – still an increased yield was found in
irrigated I4 treatments over the non-irrigated ones (Table 3). However, the highest
(36.45kg) tuber yield/plot among all the irrigated treatments was obtained in
Chamak with I4 and the lowest (23.84kg) was in Cardinal with I1. Among the nonirrigated
treatments Cardinal produced the lowest (10.60kg) tuber yield/plot.