Abstract:
The experiment was conducted in the Horticultural Farm of Sher-e-Bangla Agricultural
University, Dhaka-1207, Bangladesh. The experiment consisted of two factors. Factor
A: Different levels of potassium as K
0
= Control, K
1
II
= 100 kg K/ha, K
2
= 120 kg K/ha,
K
3
= 140 kg K/ha and Factor B: E
0
= no earthing up, E
1
= two times earthing up, E
2
=
three times earthing up. The experiment was laid out in a Randomized Complete Block
Design with three replications. The collected data were statistically analyzed. Results
revealed that in terms of potassium application, the highest gross yield of roots/ha
(38.35 t) and marketable yield of roots/ha (35.32 t) were recorded from the application
of K
2
(120 kg K/ha) treatment compared to K
0
(control) treatment. Again, in terms of
different earthing up treatments, the highest gross yield of roots/ha (35.71 t) and
marketable yield of roots/ha (34.75 t) were found from the treatment E
2
(three times
earthing up) compared to E
0
(no earthing up) treatment. Both potassium and earthing
up and their combination showed significant variation on different parameters of carrot.
The highest gross yield of roots/ha (43.51 t) and marketable yield of roots/ha (42.29 t)
were found from the treatment combination of K
2
E
2
(120 kg K/ha + three times earthing
up) compared to K
0
E
0
(control) treatment combination. The highest gross return (Tk.
507480), net return (Tk. 313782) and BCR (2.62) were obtained from the treatment
combination K
2
E
2
(120 kg K/ha + three times earthing up) where the lowest gross return
(Tk. 240360), net return (Tk. 83478) and BCR (1.53) were obtained from K
0
(control)
treatment combination. So, It can be concluded that 120 kg K/ha with three times
earthing up was the best for carrot cultivation.
