PERFORMANCE OF RAJMAH BASED INTERCROPPING SYSTEM UNDER RAINFED SITUATION
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Date
2021
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Abstract
A field experiment was conducted in the experimental field, All India Coordinated
Research project on Dryland Agriculture, Biswanath Chariali centre, Biswanath college of
Agriculture, Assam Agricultural University during the rabi season of 2020-21 to study the
“Performance of Rajmah based intercropping system under rainfed situation”. The
soil of the experimental site was sandy loam in texture, acidic in reaction (pH 4.98),
medium in organic carbon (5.80 g kg-1), available N (330.10 kg ha-1), available K2O
(171.35kg ha-1) and available P2O5 (23.26 kg ha-1). The experiment was laid out in
Randomized Block Design (RBD) involving three (3) replications with thirteen (13)
treatments consisting of five (5) crops (rajmah, toria, linseed, lentil and buckwheat) which
were grown solely as well as intercropped in different ratios of 1:1 and 2:1 viz. T1: sole
rajmah, T2: sole toria, T3: sole linseed, T4: sole lentil, T5: sole buckwheat, T6: rajmah +
toria (1:1), T7: rajmah + linseed (1:1), T8: rajmah + lentil (1:1), T9: rajmah + buckwheat
(1:1 ), T10: rajmah + toria (2:1), T11-rajmah + linseed (2:1), T12: rajmah + lentil (2:1) and
T13: rajmah + buckwheat (2:1). The competitive behavior of component crops in different
intercropping system was determined in terms of land equivalent ratio (LER), relative
crowding coefficient (RCC), aggressivity (A) and monetary advantage index (MAI). The
results revealed that rajmah+lentil (2:1) intercropping system (T12) was found to be more
economical and highest monetary advantage index (6012.08). The same system had the
highest aggressivity value (+1.19 & -1.19 respectively) followed by rajmah + linseed (2:1).
The relative crowding coefficient was >1 in rajmah among the intercropping treatments
indicating yield advantage compared with sole cropping except T6, T9, T10 and T13
treatments. Rajmah intercropped with lentil under 2:1 ratio recorded the highest land
equivalent ratio (1.18) and rajmah equivalent yield (13.46 qha-1). Economic analysis of the
intercropping system revealed the highest gross return (Rs. 96,912.00 ha-1), net return (Rs.
66,132.00 ha-1) and benefit:cost ratio (3.1) under rajmah + lentil (2:1) ratio.