Book of Extended summaries ISDA

International Conference on Reimagining Rainfed Agro-ecosystems: Challenges &
Opportunities during 22-24, December 2022 at ICAR-CRIDA, Hyderabad
of 45,000 ha and yields are limited by the amount and distribution of rainfall during monsoon
period. Pigeon pea is a late maturing, tall growing, wide spaced crop with deep root system can
accommodate rapidly growing, short duration and short statured crops like millets and pulses.
To develop climate resilient alternative crop management systems and to reduce the impact of
crop failure due to drought. During the years 2016-2018 eighteen pigeon pea based
intercropping systems were assessed under rainfed situation ie pigeon pea + greengram (1:5),
pigeon pea + blackgram(1:5),T3: pigeonpea + setaria(1:5 ) and T4: Pigeonpea Sole).
The results indicated that, among the cropping systems, intercropping of pigeonpea +
greengram (1:5) (1263 kg ha-1), pigeon pea + setaria(1:5) 1244kg/ha and blackgram with
pigeon pea (1198 kg ha-1) resulted in maximum pigeon pea equivalent yield over sole crop of
pigeon pea (986 kg /ha). The LER is high in pigeon pea + setaria intercropping system (1.67)
as compared to other inter cropping systems. Among all intercropping Systems pigeon pea +
setaria recorded highest net returns (26826 Rs/ha) followed by pigeon pea + greengram
(24360Rs/ha) compared to pigeonpea + blackgram and sole pigeonpea. From the results it is
evident that intercropping in rainfed areas stabilises the productivity and enhance the returns in
terms of increased net returns and benefit cost ratio as well. Intercropping also act as insurance
under the conditions of crop failures due to pest incidence, weeds and changing monsoon
conditions.
Climate resilient agriculture for risk mitigation
T2a-09R-1224
Does Rise in Atmospheric Temperature and Carbon Dioxide Adversely
affect Maize Growth in Acid Soils of Northeast India?
Ramesh Thangavel*, B.U. Choudhury, A. Balusamy, M. Prabha Devi, Joymati Chanu,
M. Chakraborty, S. Hazarika and V.K. Mishra
Division of System Research and Engineering, ICAR Research Complex for NEH Region, Umiam,
Meghalaya-793103
*rameshssac@yahoo.co.in
Climate change was a myth or speculation in earlier times. However, now world has
recognised that climate change is a fact. Today, the atmospheric concentration of CO 2 has
risen to more than 400 ppm, warming the atmosphere by 0.84 o C (Vanaja et al., 2015). Global
warming will have an impact on crop productivity. Plant development will be aided by
increased photosynthesis and fertilisation effects brought on by elevated atmospheric CO 2
(Kim et al., 2007). Increased temperature will result in physiological problems and heat
injury, which will lower yield (IPCC, 2014). Depending on the regions, increased warmth
brought on by increased CO 2 will have a significant impact on the production of food grains.
Food grain production is expected to decline by up to 30% in tropical and subtropical nations
like India as temperatures rise by 1.0 to 2.0 o C (IPCC, 2014). Therefore, adaptation strategies
to sustain the crop productivity in the region is in urgent need. However, limited state of the
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