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A field experiment was conducted at Agronomy Research Farm, Acharya Narendra Deva University of Agriculture and Technology, Kumarganj, Ayodhya, Uttar Pradesh, on silty loam soil during 2016–17 and 2017–18 to study the productivity and profitability of rice (Oryza sativa L.) influenced by customized fertilizers in rice-wheat cropping system. The experiment comprised of 6 nutrient management practices, viz. T1, control; T2, recommended dose of fertilizer (RDF); T3, Soil test-based recommendation (STR); T4, Indo-Gulf customized fertilizer; T5, TCL customized fertilizer and T6, Farmer’s practice. The experiment was laid out in a randomized block design with 4 replications. Results revealed that soil test-based recommendation showed significantly higher grain yield (4.88 t/ha), straw yield (7.53 t/ha) of rice, maximum number of effective tillers (438.6/m2), higher length of panicle (25.05 cm), maximum number of grains/panicles (135.10) and test weight (23.81g) over farmer’s practice and RDF, while it was at par with TCL customized fertilizer and Indo-Gulf customized fertilizer. The higher buildup of organic soil carbon (0.43%) and available N (174.11 kg/ha), P (18.98 kg/ha), S (14.88 ppm), DTPA-Zn (0.65 ppm) and B (0.55 ppm) in was maintained or slightly increased in soil test-based recommendation and customized fertilizers applied plots. While higher availability of K (259.80 kg/ha) was found in RDF. The higher net returns (32.58 × 103 `/ha) per rupee investment and B:C ratio (0.82) was also recorded in Soil test-based recommendation followed by Indo-Gulf customized fertilizer and TCL customized fertilizer.
Kumar et al. (Sun,) studied this question.