Book of Extended summaries ISDA

International Conference on Reimagining Rainfed Agro-ecosystems: Challenges &
Opportunities during 22-24, December 2022 at ICAR-CRIDA, Hyderabad
T5-05R-1330
PASM Induced Yield Variability in Soybean Crop at Akola conditions
A. R. Tupe * , A. P. Karunakar, M. M. Ganvir, A. B. Chorey, R. S. Patode,
V. V. Gabhane , S. T. Morey and R. S. Mali
Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola -444 104 (Maharashtra)
*tupearvind@rediffmail.com
Drought of different magnitude is becoming a common phenomenon, which affects adversely
on Indian agriculture. Available soil moisture is a very relevant indicator of drought, especially
in rainfed region. Soil moisture-based indices could be calculated using a simple region wide
soil moisture balance methodology which entails collecting some of the base line data related
to soil properties, climatic parameters and crop growth pattern, basically, soil moisture balance
calculates the amount of rainfall available to crops depending upon crop water requirement,
climatic evaporation demand and soil water holding capacity. It is suggested that one of the
soil moisture based indices viz., Percent Available Soil Moisture (PASM) is used. These
indices may be calculated at weekly interval and averages over dominant crop growth stages
such as vegetative, flowering and pod development. These indices should be combined with
other indicators for the determination of drought.
Methodology
A field experiment was initiated on the research field of AICRP for Dryland Agriculture, Dr.
Panjabrao Deshmukh Krishi Vidyapeeth, Akola, Maharashtra since 2010 to 2018. Experiment
was conducted in a factorial randomized block design with four replications. The treatment
under study were four dates of sowing times in deferent Meteorological weeks such as 26 th MW,
27 th MW, 28 th MW, 29 st MW and three cultivar such as JS-335, JS-9305, TAMS-98-21 was sown
at a spacing of 45x5 cm. the gross plot size 5 x 4.5 m and net plot size was 3.6 x 4.6 m. All the
recommended agronomic practices were adopted during the experimental period.
The data on the occurrence of specific phenophagical stages of soybean observed during the
experimental period in the three cultivars under different growing environment and soil
moisture at different depth to assess the effect of soil moisture on different growth stages and
final seed yield. Long term Crop - weather and moisture depletion pattern in soybean shown
that the Percent Available Soil Moisture (PASM) should not go below 50 percent for normal
crop growth. The results shows that relationship between PASM (%) and Soybean seed yield
(Kg/ha) for the year 2008-2018.
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