Book of Extended summaries ISDA

International Conference on Reimagining Rainfed Agro-ecosystems: Challenges & Opportunities
during 22-24, December 2022 at ICAR-CRIDA, Hyderabad
Results
Yield Performance of Elephant Foot Yam and Black gram
The higher yield response to the organic manure and inorganic fertilizers might be attributed to
decomposition of organic manure as it improves the physical and biological properties and
nutrient release pattern in to the soil and supplements the effect of inorganic fertilizers.
Yield response (%)
70
60
50
40
30
20
10
0
EFY Yield response (%) Black gram Yield response (%)
Effect of organic and inorganic nutrients on yield of elephant foot yam and black gram
Relationship of Available Nwith Inorganic nitrogen fractions and Availbale K with
Inorganic Potassium fractions
Significant positive correlation could be observed among the nitrogen fractions as these fractions
are dependent on each other for their synthesis during mineralization process. The total K
content of the soil showed highly significant correlation with non-exchangeable K (r=0.944 ** )
and least with exchangeable K (r=0.875 ** ). The highest correlation was recorded in
Exchangeable K (r = 0.979 ** ) followed by non-exchangeable K (r=0.927 ** ) and water soluble K
(r=0.921 ** ).
Conclusion
Application of half of the recommended doses of NPK fertilizers in combination with organic
manure (FYM) sustain the soil quality, and enhances the productivity and quality of elephant
foot yam – black gram cropping system in acid Alfisols of Eastern India. Integrated application
of organic manure and inorganic chemical fertilizers at balanced proportion not only helps to
augment the crop yields but also enhances the available nutrient status as well as the yield and
quality of elephant foot yam-black gram system. Cultivation of pulses as inter crops in between
tropical root and tuber crops not only enhances the total farm productivity but also enrich the soil
fertility by accumulation of its biomass that facilitates the biological activity of the soils.
692 | Page Resource conservation and rainfed agriculture