Book of Extended summaries ISDA

International Conference on Reimagining Rainfed Agro-ecosystems: Challenges &
Opportunities during 22-24, December 2022 at ICAR-CRIDA, Hyderabad
T4a-02O-1242
Conjuctive use of Organic and Inorganic Fertilizers for Rabi Sorghum
V. M. Amrutsagar, S. K. Upadhye, N. B. More, G. Ravindra Chary, Archana B. Pawar,
D. K. Kathmale, I. R. Bagwan and B. S. Kadam
AICRP for Dryland Agriculture, Main Center, Solapur- 413 002 Maharashtra
zarssolapur@gmail.com
It is the today’s need to select and prioritize climate resilient technologies that are sustainable
for the rainfed and dryland areas. The technologies should minimize the effect of extreme
climate events such as drought, flood, change in rainfall pattern, heat and cold waves, etc.
Considering the climate change effects observed severe damage and risk in the cultivation of
rainfed and irrigated field crops. Organic + inorganic fertilizer management is a most
appropriate system of agriculture (Sharma, 1992.) Similar to regenerative agriculture, that
encourage healthy soils and crops through such a practices as untried recycling of organic
matter (compost/ crop residues) crop rotation, proper tillage and minimum / optimum use of
inorganic fertilizers and pesticides. It is therefore the present investigation was undertaken
with the objectives viz., to study the feasibility of use of crop residue, green loppings and
FYM with and without inorganic fertilizers in the field and its subsequent effect on crop
yield, to assess its effect on physico-chemical and biological properties of soil and to study
the economics.
Methodology
A long-term field experiment was initiated during 1987-88 at All India Coordinated Research
Project for Dryland Agriculture, Main Center, Solapur on medium black soil (Vertic
Ustropepts). The experiment is continued for 35 years (2021-22) on the same site with ten
treatments with three replications in Randomized Block Design without disturbing the
original layout. The treatments tried are : T1 - 0 kg N ha -1 control, T2 - 25 kg N ha -1 urea, T3 -
50 kg N ha -1 –urea, T 4 - 25 kg N ha -1 CR (crop residues-byre waste), T 5 - 25 kg N ha -1 –FYM
(farm yard manure), T6 - 25 kg N ha -1 CR + 25 kg N ha -1 urea, T7 - 25 kg N ha -1 FYM +25
kg N ha -1 urea, T8 - 25 kg N ha -1 CR+25 kg N ha -1 Leucaena loppings , T9 - 25 kg N ha -1
Leucaena loppings, T 10 - 25 kg N ha -1 Leucaena loppings + 25 kg N ha -1 urea. The physicochemical
properties of soil, rainwater use efficiency (RWUE) and nutrient uptake of rRabi
sorghum were studied. The initial soil status was low in soil fertility (Ava. N- 137 and P 2O 5 –
11.5 kg ha -1 ) and DTPA extractable micronutrients (mg kg -1 ) Fe (2.95), Zn (0.49) and Cu
(0.50).
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