Abstract
Soil test crop response (STCR) correlation studies were carried out in Vindhy an alluvial plain during 2001 to 2004 taking IR-36 as test crop to quantify rice production in the context of the variability of soil properties and use of balanced fertilizers based on targeted yield concept. The soils were developed on gently sloping alluvial plain with different physiographic settings and notable variation in drainage condition. Soil properties show moderate variation in texture (loamy to clay), organic carbon content (4.4 to 9.8 g/kg), cation exchange capacity (10.2 to 22.4 cmol (p+)/kg) and pH (5.3 to 6.4). Soil fertility status for N is low to medium (224 to 348 kg/ha), P is medium to high (87 to 320 kg/ha) and K ranges from medium to high (158 to 678 kg/ha). Database regarding nutrient requirement in kg/t of grain produce (NR), the percent contribution from the soil available nutrients [CS(%)] and the percent contribution from the applied fertilizer nutrients [CF (%)] were computed for calibrating and formulating fertilizer recommendations. Validity of the yield target for 7 and 8 t/ha was tested in farmers’ fields and yields targets varied at less than 10%. The percent achievement of targets aimed at different level was more than 90%, indicating soil test based fertilizer recommendation approach was economically viable within the agro-ecological zone with relatively uniform cropping practices and socio-economic conditions.
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Project supported by the Indian Council of Agricultural Research, and the National Agricultural Technology Program, India
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Bera, R., Seal, A., Bhattacharyya, P. et al. Targeted yield concept and a framework of fertilizer recommendation in irrigated rice domains of subtropical India. J. Zhejiang Univ. - Sci. B 7, 963–968 (2006). https://doi.org/10.1631/jzus.2006.B0963
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DOI: https://doi.org/10.1631/jzus.2006.B0963