Book of Extended summaries ISDA

International Conference on Reimagining Rainfed Agro-ecosystems: Challenges &
Opportunities during 22-24, December 2022 at ICAR-CRIDA, Hyderabad
Ito H and Morimoto S. Non-destructive determination of lycopene in tomatoes using
visible/near-infrared spectroscopy. Journal of the Illuminating Engineering Institute of
Japan, 2009, 93, 510-513.
Pourdarbani R, Sabzi S, Rohban M. H, García-Mateos G and Arriba J. I. 2021. Non-destructive
nitrogen content estimation in tomato plant leaves by Vis-NIR hyperspectral imaging
and regression data models. Applied Optics, 60(30): 9560-9569.
ASD Inc. 2010. FieldSpec® HandHeld 2 Spectroradiometer User Manual.
T5-27P-1332
Assessment of Soil Fertility Constraints in Shrirampura Micro-Watershed,
Turuvekere Taluk, Tumkur District, Karnataka Using Geospatial
Techniques
K. T. Aruna, B. G. Vasanthi, B. Mamatha and A. Sathish
University of Agricultural Sciences, GKVK, Bangalore
The study was conducted in Shrirampura micro-watershed, Turuvekere tauk, Tumkur district
under southern dry zone of Karnataka, Agro ecological sub region 8.2 (AESR 8.2) to assess
the soil fertility constraints using geospatial techniques. The world view-2 and LISS-IV merged
satellite data at the scale of 1:7920 were used in conjunction with the cadastral map as a base
for detailed survey. A total of 54 geo-referenced representative surface soil samples (0–20 cm)
were collected at 320 m 2 grid interval from different land use and land forms with a microwatershed
area of 537 ha. Soil samples were analyzed for pH, EC, organic carbon, available
nitrogen, available phosphorus, available potassium and micronutrients (Fe, Mn, Cu, and Zn).
The spatial distribution maps were developed by using krigging method. Major portion of the
watershed area was showed that, the soils were neutral to (44.6 %) to slightly alkaline (45.9 %)
and non-saline in nature. The organic carbon (OC) status ranged from low (72 %) to medium
(21 %) and the entire micro watershed area was found to be low in available nitrogen (N)
content. The soil available phosphorus (P) was low (39.7 %) to medium (53.3 %), available
potassium (K) was medium (70.2 %) to high (18.8 %) and available sulphur (S) in medium
category. Regarding available micronutrients, copper (Cu), iron (Fe) and manganese (Mn) were
sufficient in range and zinc (Zn) was found to be deficient (58.9 %) to sufficient (34.1 %) in
the study area. The developed thematic maps by using geospatial techniques in the study area
identified that OC, N, P and Zn were important soil fertility constraints indicating their
immediate attention to achieve sustainable productivity. The generated information can help
the researchers, farmers and planners to manage the natural resources for future planning.
Emerging approaches (RS, AI, ML, Drones etc) for crop management &assessment
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