Book of Extended summaries ISDA

International Conference on Reimagining Rainfed Agro-ecosystems: Challenges & Opportunities
during 22-24, December 2022 at ICAR-CRIDA, Hyderabad
50% N +100% P+30kg K through gliricidia 902.00 0.27 45700 18550 1.67
100% K through gliricidia 809.37 0.25 41388 17739 1.73
SE (m) ± 30.96 - 1517 1517 -
CD at 5% 87.31 - 4278 4278 -
The pooled data on yield and economics of cotton presented in Table indicate that the higher
gross monetary returns, net monetary returns and B:C ratio was obtained with the application
of 100% NP + 10 kg K(inorganic)+20 kg K through gliricidia (T 4) indicating the significant
role of integrated nutrient management through gliricidia green leaf manuring in enhancing
the economics of cotton cultivation. The higher soil organic carbon (0.68%) was recorded
with application of 100% NP + 10kg K(inorganic)+20kg K through gliricidia (T 4). The data
on available nutrient status of the experimental soil, indicated that significantly higher
available nitrogen (211.2kg ha -1 ), available phosphorus (16.75kg ha -1 ) and available
potassium (361.6kg ha -1 ) was observed with application of 100% NP + 10 kg
K(inorganic)+20 kg K through gliricidia(T 4). The increase in available phosphorus status
under INM treatments is due to use of gliricidia green leaf manure, being direct source of
phosphorus and it might have also solubilized the native phosphorus in the soil through
release of various organic acids which had chelating effect, that reduced phosphorus fixation,
whereas the increase in available K may be due to the fact that, gliricidia green leaf manure
addition could increase the CEC of soil, which is responsible for holding more amount of
exchangeable K and helped in the release of exchangeable K from non-exchangeable pool
just as in case of the study of Kumar et al., 2008.
Effect potash management through gliricidia green leaf manuring on soil fertility and SQI
Treatments
OC
(%)
Avail. Nutrients
(kg ha -1 )
N P K
Control 0.50 181.9 12.75 317.8 2.66
100% RDF (60:30:30 NPK kg ha -1 ) 0.59 198.6 15.05 334.9 2.95
100% NP + 15kg K(inorganic)+15kg K through gliricidia 0.65 209.1 16.51 352.2 3.41
100% NP + 10kg K(inorganic)+20kg K through gliricidia 0.68 211.2 16.75 361.6 3.52
100% NP + 30kg K through gliricidia 0.64 204.9 15.54 353.4 3.37
75% N +100% P+15kg K(inorganic)+15kg K through gliricidia 0.60 196.5 15.18 338.9 3.18
75% N +100% P+30kg K through gliricidia 0.59 198.6 15.12 332.1 3.15
50% N +100% P+30kg K through gliricidia 0.58 192.3 14.81 326.9 3.01
100% K through gliricidia 0.56 190.2 14.08 324.4 2.95
SE (m) ± 0.01 4.02 0.21 6.75 -
CD at 5% 0.04 12.05 0.64 20.2 -
Initial value (2015-16) 0.51 185.8 14.6 322.0 -
SQI
Resource conservation and rainfed agriculture
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