Development and validation of soil test based fertilizer prescription equations for enhancing yield, uptake and nutrient use efficiency of foxtail millet (Setaria italica) under dryland condition

Balanced crop nutrition will be rewarding to profitable sustainable yield and soil quality.To develop and validate fertilizer prescription equation for foxtail millet under dryland farming situation by encompassing the Soil Test Crop Response approach (STCR), field experiments were conducted at East...

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Bibliographic Details
Published in:Journal of plant nutrition 2023-08, Vol.46 (13), p.3082-3100
Main Authors: Krishna Murthy, R., .Basavaraja, P. K, Bhavya, N., Dey, Pradip, Mohamed Saqueebulla, H., Gangamurtha, G.V., Venkata Shiva Reddy, J. S.
Format: Article
Language:English
Subjects:
Agricultural production
Agricultural sciences
Arid zones
Cereal crops
Crop yield
Crops
Dryland farming
Economics
Efficiency
Fertilizers
Field tests
Foxtail millet
Grain
Mathematical analysis
Millet
Nutrient uptake
nutrient use efficiency
Nutrients
Nutrition
Organic fertilizers
Organic soils
Organic wastes
Phosphorus pentoxide
Profitability
Setaria italica
Soil quality
soil test crop response
Soil testing
Soils
Sustainable yield
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Summary:Balanced crop nutrition will be rewarding to profitable sustainable yield and soil quality.To develop and validate fertilizer prescription equation for foxtail millet under dryland farming situation by encompassing the Soil Test Crop Response approach (STCR), field experiments were conducted at Eastern Dry Zone of Karnataka, University of Agricultural Sciences, Bangalore from Kharif 2017 to 2020 in four phases. Soil test data, grain yield, and NPK uptake by foxtail millet crop were used for achieving four important basic parameters, viz., Nutrient requirement, contribution of nutrients from fertilizers (%CF), soil (%CS), and organic manure (%C-OM) to develop the targeted yield equation and these equations were in comparison with Low-Medium-High (LMH) approach and general recommended dose (GRD). It was found that 4.30, 3.13, and 3.61 kg of N, P 2 O 5 , and K 2 O, respectively were required for producing one quintal of foxtail millet grain under inorganic approach whereas 4.20, 2.87, and 4.19 kg of N, P 2 O 5 , and K 2 O, respectively, under integrated approach. The STCR approach, with or without FYM, at the target yields 13 and 10 q ha −1 enhanced the grain yield over general recommended dose and approach. It also exhibited a higher NPK uptake and use efficiency, along with better profitability. Frontline demonstrations were conducted at Tumakuru district, Karnataka, and grain yield under the STCR approach was increased to the extent of 77.94% compared to farmer's practice. STCR-targeted yield approach could improve the yield, economics, and efficiency of nutrient use for foxtail millet compared to GRD and LMH approach.
ISSN:0190-4167
1532-4087
DOI:10.1080/01904167.2023.2188065