Book of Extended summaries ISDA

International Conference on Reimagining Rainfed Agro-ecosystems: Challenges &
Opportunities during 22-24, December 2022 at ICAR-CRIDA, Hyderabad
Methodology
The experiment was conducted during kharif season of 2017-18 at Farm of University
Department of Agronomy, Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola (Maharashtra).
The soil of experimental plot was clayey in texture and slightly alkaline in reaction. As regards
to fertility status, the soil was medium in available nitrogen, low in available phosphorus, fairly
high in available potassium and moderate in organic carbon. The experiment was laid out in a
randomized block design with three replications. The eight treatments comprised of T1- Control
(No Spray), T 2-Water spray at 25-30 DAS and 60-65 DAS, T 3 - 1% KNO 3 at 25-30 DAS, T 4-
2% KNO3 at 25-30 DAS, T5- 1% KNO3 at 60-65 DAS, T6- 2% KNO3 at 60-65 DAS, T7-1%
KNO3 at 25-30 DAS and 60-65 DAS and T8- 2% KNO3 at 25-30 DAS and 60-65 DAS.
Results
Data on productivity and economics of soybean as influenced by different treatments is
presented in the Table. Significantly higher grain and straw yield (2135 and 2677 kg ha -1 ,
respectively) was recorded with application 1% KNO 3 at 25-30 DAS and 60-65 DAS (T 7) and
found at par with application of 2 % KNO3 at 25-30 DAS and 60-65 DAS (T8) which recorded
grain and straw yield of 2055 and 2610 kg ha -1 , respectively. The lowest grain yield of 1590
kg ha -1 and straw yield of 2103 kg ha -1 was observed in T1 (control). The application of
potassium nitrate supplied N and K which are absorbed as anion and cation by plants and might
have delayed the synthesis of abscisic acid and promoted cytokinin activity causing higher
chlorophyll retention which in turn promoted more leaf area.
Productivity and Economics of soybean as influenced by different treatments
Treatment
Yield (kg ha -1 )
Seed
Straw
Gross
Monetary
Returns
(Rs. ha -1 )
Net
Monetary
Returns
(kg ha -1 )
B:C ratio
T 1 - Control (No Spray) 1590 2103 59856 31783 2.13
T 2 - Water Spray at 25-30 DAS and 60-
65 DAS
1651 2140 62065 33072 2.14
T 3 - 1% KNO 3 at 25-30 DAS 1852 2391 69602 39712 2.33
T 4 - 2% KNO 3 at 25-30 DAS 1820 2356 68412 37625 2.22
T 5 - 1% KNO 3 at 60-65 DAS 1905 2445 71565 41545 2.38
T 6 - 2% KNO 3 at 60-65 DAS 1880 2422 70644 39727 2.28
T 7 - 1% KNO 3 at 25-30 DAS and 60-65
DAS
T 8 - 2% KNO 3 at 25-30 DAS and 60-65
DAS
2135 2677 80079 48242 2.52
2055 2610 77145 43514 2.29
SE (m)± 47 71 1845 1845 0.06
CD at 5% 145 213 5536 5536 0.19
Institutional and policy innovations for accelerated and enhanced impacts
864 | Page