Book of Extended summaries ISDA

International Conference on Reimagining Rainfed Agro-ecosystems: Challenges & Opportunities
during 22-24, December 2022 at ICAR-CRIDA, Hyderabad
Mean 3083.5 6511 6262 9098
Figures in parentheses are % increase over control
References
Krishan, J. H., Arkin, G. F., and Wartin, J. R. 1987. Run of impoundment for supplemental
irrigation in texas. Water Resource Bull. 23 (6):1057-1061.
Nagdeve, M. B., and Patode, R. S. 2012. Protective irrigation through farm pond for
enhancing crop productivity. Application technologies for harvested rainwater in farm
ponds. In: proceeding of national consultation meeting held at CRIDA, Hyderabad. Pp:
62-67.
T4a-19P - 1205
Effect of Long-Term Conservation Agriculture on Labile and Total Soil
Organic Carbon Fractions of Rainfed Pearl Millet-Based Cropping
Systems of India
Amresh Chaudhary, M. C. Meena, S. P. Datta, A. Dey, R. S. Bana and D. M. Mahalla
ICAR – Indian Agricultural Research Institute, New Delhi -12, India
Conservation agriculture improves soil organic carbon concentration in surface soils but the
increase in the SOC concentration are site-specific all over the world. The dynamics of SOC
in CA is presented through assessment of management-induced changes in different fractions
of SOC. Recent researches on SOC are focused on the quality of SOC, and its fractions are
used as indicators of soil quality. The labile fractions include cold water extractable organic
carbon (CWEOC); hot-water extractable organic carbon (HWEOC) and active carbon (AC).
These fractions have small turnover time ranging from days to years. The non-labile fractions
are chemically less active and are mainly responsible soil carbon sequestration. Yet, the
information regarding SOC dynamics of labile and total organic carbon fractions are not
sufficiently available under rainfed conservation agriculture. Therefore, we hypothesized that
adoption of different tillage, residue management and cropping systems under rainfed pearl
millet cropping systems have varied response for labile as well total soil organic carbon.
Methodology
A field experiment was initiated during rainy season of 2012–13 in the Research Farm of
ICAR-Indian Agricultural Research Institute, New Delhi. Geographically, Delhi is situated
between latitude of 28°37 and 28°39 N and longitude of 77°9 and 77°11 E at an altitude of
225.7 meter above mean sea level. It has semi-arid, sub-humid and subtropical climate with
hot dry summer and severe cold winter. The Experimental plot consists of four tillage
practices (Zero-Tillage with residues – ZTR, Zero-Tillage without residues – ZT-(R);
Resource conservation and rainfed agriculture
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