Book of Extended summaries ISDA

International Conference on Reimagining Rainfed Agro-ecosystems: Challenges & Opportunities
during 22-24, December 2022 at ICAR-CRIDA, Hyderabad
5-15 cm soil depth (Table). The TOC content was highest in ZT+R (8.487 g kg -1 ) which is
83.82 % higher than CT (4.617 g kg -1 ) whereas fallow has highest total SOC content in 5-15
and 15-30 cm respectively.
Conclusion
From this study, it can be concluded that labile pools of soil organic carbon such as CWEOC,
HWEOC and AC as well as total SOC content are sensitive to changes in tillage as well
cropping systems under different soil depths in rainfed pearl millet-based cropping systems.
The adoption conservation tillage with residue retention on soil surface and crop rotation with
legumes improves soil organic carbon content and quality as compared to conventional tillage
systems.
Depth distribution of labile soil organic carbon fractions
Treatment/depth CWEOC (g kg -1 ) HWEOC (g kg -1 ) AC (g kg -1 )
Tillage
0-5 cm
5-15
cm
15-30
cm
0-5
cm
5-15
cm
15-30
cm
0-5 cm
5-15
cm
15-30
cm
ZT+R 0.097 a 0.088 a 0.077 0.287 a 0.154 b 0.111 b 0.527 a 0.435 0.226
ZT-R 0.062 b 0.037 b 0.078 0.191 b 0.121 c 0.0945 c 0.474 ab 0.456 0.224
CT 0.093 a 0.030 b 0.084 0.179 b 0.174 a 0.111 b 0.443 bc 0.389 0.233
Fallow 0.0794 ab 0.032 b 0.068 0.277 a 0.164 ab 0.132 a 0.367 c 0.305 0.181
Cropping systems
PM-C-M 0.083 0.059 a 0.087 0.218 b 0.153 ab 0.108 b 0.509 a 0.432 0.225
PM-C-
FPM 0.087 0.039 b 0.075 0.220 b 0.137 b 0.115 b 0.475 ab 0.421 0.217
PM-C 0.0818 0.055 a 0.077 0.217 b 0.160 a 0.093 c 0.462 b 0.427 0.242
fallow 0.0794 0.032 b 0.068 0.277 a 0.164 a 0.132 a 0.367 c 0.305 0.181
References
R Core Team. 2022. R: A language and environment for statistical computing. R Foundation
for Statistical Computing, Vienna, Austria. URL https://www.R-project.org/.
Weil, R.R., Islam, K.R., Stine, M.A., Gruver, J.B. and Samson-Liebig, S.E. 2003. Estimating
active carbon for soil quality assessment: A simplified method for laboratory and field
use. American J. Alternative Agric., 18(1): 3-17.
Resource conservation and rainfed agriculture
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