Book of Extended summaries ISDA

International Conference on Reimagining Rainfed Agro-ecosystems: Challenges & Opportunities
during 22-24, December 2022 at ICAR-CRIDA, Hyderabad
sustainable yield index and system productivity. The rate of change in SOC stock under different
nutrient management practices was calculated, which revealed that, the rate of change was
negative for control, and sole organic treated plots, while it was positive in rest of the treatments
with highest build-up in INM treatments. The sustainable yield index (SYI) was higher with
partial substitution of nitrogen either by farmyard manure (FYM) or gliricidia along with
chemical fertilizers. Furthermore, the system productivity under treatment substitution of
nitrogen either through gliricidia along with chemical fertilizers, or by farmyard manure (FYM)
was 80% higher over control and 14 and 19% higher over 100% RDF, respectively. The Pearson
correlation matrix between soil properties and system productivity revealed that, all the assessed
soil properties were highly positively correlated with system productivity except for BD, pH and
EC. Additionally, the management sensitive biological properties of soil such as, MBC, DHA,
Alkaline phosphatase also had strong positive correlation with available nutrients and SOC.
Sustainable soil management for resilient rainfed agro-ecosystem: conservation agriculture, organic farming,
INM, soil-microorganisms-plant interactions
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