Book of Extended summaries ISDA

International Conference on Reimagining Rainfed Agro-ecosystems: Challenges &
Opportunities during 22-24, December 2022 at ICAR-CRIDA, Hyderabad
stress condition in rainfed sorghum. The soil at the experimental was clayey in texture and
belongs to Kovilpatti Soil Series (Typic Chromusterts). The soil has sub angular blocky
structure with pH generally neutral to a tendency towards alkalinity at lower depths (7.8 to 8.2)
and saline in nature. The soil bulk density varied from 1.20 to 1.35 kg m -3 with the field capacity
of 35 per cent and permanent wilting point of 14 per cent (Sunflower as an indicator plant).
This experiment was conducted in split plot design replicated thrice under rainfed situation.
The available nutrient status of the soil was low in available nitrogen (134.4kg ha -1 ), low to
medium in available phosphorus (12.1 kg ha -1 ), high in available potassium status (395 kg ha -
1
) and low in available zinc (1.2 ppm). The treatment comprised of main plots viz., M1-Foliar
spray during dry spell, M 2 - Foliar spray after relieving of stress/dry spell (with favorable soil
moisture) and seven subplots of foliar nutrients viz., S 1-Urea @ 1%, S 2-Urea @ 2%, S 3-Water
soluble complex fertilizer (19:19:19) @ 0.5%, S4-Water soluble complex fertilizer (19:19:19)
@ 0.5% + recommended dose of micronutrient for foliar spray (zinc), S 5-ZnSO 4 @ 0.5%, S 6-
Water spray, S7-Control (no spray of any material/water). Foliar application of plant nutrients
are applied as per the treatment schedule under rainfed vertisols.
Effect of foliar plant fertilization of different chemicals on yield and economics of
rainfed sorghum (K 12)
Treatments Yield (kg/ha) Cost of
B:C
Mainplot:
Grain yield
Stover
yield
cultivation
(Rs./ha)
Net returns
(Rs./ha)
M 1 1339 1975 19300 9455 1.49
M 2 1235 1748 19150 7298 1.38
SEd 30.0 45.5
CD (0.05) 62.0 93.5
Sub plot:
Results
T 1 1172 1642 20200 4882 1.24
T 2 1235 1811 20900 5611 1.27
T 3 1378 2288 21100 8748 1.42
T 4 1343 1948 21825 6983 1.32
T 5 1294 1722 20225 7377 1.36
T 6 1202 1574 19700 5914 1.30
T 7 1052 1329 19500 2869 1.15
SEd 31.5 81.2
CD (0.05) 65.0 165.1
In Vertisols under rainfed situation different foliar plant nutrients were applied during stress
and after relieving stress condition. Among the foliar sprays, application of water soluble
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