Book of Extended summaries ISDA

International Conference on Reimagining Rainfed Agro-ecosystems: Challenges & Opportunities
during 22-24, December 2022 at ICAR-CRIDA, Hyderabad
T4-20P-1094
Effect of Long Term Fertilization on Yield and Chemical Properties of Soil in
Soybean-Safflower Croping Sequence in dryland condition under Vertisol
Bhagyaresha R. Gajbhiye and Ramprasad N. Khandare
AICRP on Long Term Fertilizer Experiment
Department of Soil Science and Agricultural Chemistry Vasantrao Naik Marathwada Krishi Vidyapeeth,
Parbhani (M. S.)-431402, India
Long term experiments are the primary source of information to determine the effect of cropping
systems or sequences, soil management, fertilizer use and residue utilization on changes in
organic carbon (Leigh and Johnston, 1994). These are usually the only sources of information to
determine agricultural sustainability. Soyabean has become an important oilseed crop in India in
a very short period with 113.98 lakh ha area under its cultivation during kharif 2019-20. The
major soyabean growing states are Madhya Pradesh, Maharashtra, Rajasthan, Karnataka, and
Telangana. Safflower (Carthamus tinctorius), another important oilseed crop of India, is
cultivated in the winter (rabi) season from September /October to February /March. India
accounts for 41% (0.3 Mha) of world area under safflower. Because of low yield (630 kg ha -1 ),
safflower production of merely 0.19 Mha is only 29% of global production followed by that in
the US (17%), Argentina (13%), and Kazakhastan (12%).
Methodology
Composite soil samples of 0-15 cm depths were collected from individual plots after harvesting
of the crop. The collected soil samples were thoroughly mixed and brought to the laboratory, air
dried, ground with wooden mortar and pestle and sieved through 2 mm sieve, for analyzing
organic carbon, available N, P and K. Organic carbon was assessed by Walkey and Black’s rapid
titration method as suggested by Piper (1966). Available nitrogen was determined by using
alkaline potassium permanganate method suggested by Subbiah and Asija (1956). Available
phosphorus was determined by using 0.5 M sodium bicarbonate (pH 8.5) as an extractant and
measured spectrophotometrically by using 420 nm wave lengths as outlined by Olsen et al.
(1954). Available potassium was estimated by using normal neutral ammonium acetate as an
extractant and extractant was subscribed to Flame photometer Jackson (1973).
Results
The results indicated that treatment 100% NPK + FYM @ 5 t ha -1 recorded highest grain (14.17
and 6.31q ha -1 ) and straw yield (30.02 and 34.44 q ha -1 ) of soybean and safflower, respectively
Sustainable soil management for resilient rainfed agro-ecosystem: conservation agriculture, organic farming,
INM, soil-microorganisms-plant interactions
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