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Author

Ashish Vishnawat

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Open access Jul 2026

Impact of inorganic fertilizer and microbial inoculation on nutrient content and uptake by soybean (Glycine max L. Merrill) in typic haplustepts

A field experiment was conducted during the kharif season of 2025 at the Instructional Farm, Rajasthan College of Agriculture, Udaipur to evaluate the impact of inorganic fertilizer and microbial inoculation on nutrient content and uptake by soybean (Glycine max L. Merrill) grown on Typic Haplustepts. The study employed a two-factor factorial randomized complete block design with four levels in each factor and three replications. Factor A comprised inorganic fertilizer rates expressed as proportions of the recommended dose of fertilizer (RDF): F0 (control), F1 (50% RDF), F2 (75% RDF) and F3 (100% RDF). Factor B comprised microbial inoculation treatments: M0 (no inoculation), M1 (Rhizobium), M2 (Phosphate solubilizing bacteria, PSB) and M3 (Rhizobium + PSB). The results indicated that the highest nutrient content and uptake by soybean were recorded under 100% RDF (F₃), which was statistically at par with 75% RDF (F₂). Under F₃, the maximum nutrient content was 6.968 and 0.605% N, 0.605 and 0.220% P, and 1.353 and 2.63% K in seed and stover, respectively. Similarly, the highest total nutrient uptake was 113.72 kg N ha⁻¹, 17.00 kg P ha⁻¹, and 67.69 kg K ha⁻¹. Among microbial inoculation treatments, Rhizobium + PSB (M₃) recorded the highest nutrient content (6.934 and 0.594% N, 0.594 and 0.209% P, and 1.351 and 2.62% K in seed and stover, respectively) and total nutrient uptake (113.15 kg N ha⁻¹, 16.61 kg P ha⁻¹, and 67.76 kg K ha⁻¹), while Rhizobium and PSB alone were comparable to each other. Therefore, this study investigates the combined effects of inorganic fertilizers and microbial inoculation (Rhizobium and PSB) on the nutrient uptake and yield of soybean cultivated in the Typic Haplustepts of Rajasthan. This integrated approach offers a highly sustainable strategy to maximize soybean productivity, reduce chemical dependency and maintain soil fertility in semi-arid agricultural systems.

Archana Rani, D. P. Singh, R. S. Meena et al. · 0 citations
Open access Aug 2026

Effect of Biofertilizers and Growth Promoting Microorganisms on Productivity and Profitability of Mungbean [(Vigna radiata (L.) Wilczek] under Mungbean-Wheat Cropping System

A field experiment was conducted during Kharif 2022 and 2023 at Dr. BRC Agricultural Research Station (ARS), Mandor, Rajasthan, to evaluate the effect of biofertilisers and growth-promoting microorganisms on growth, yield, and profitability of mungbean (Vigna radiata (L.) Wilczek, var. GM-4) under the mungbean–wheat cropping system. The experiment was laid out in a Randomised Block Design with ten treatments and three replications. Treatments consisted of different combinations of the recommended dose of fertilisers and seed inoculation, soil application, or combined seed and soil application of Rhizobium and phosphate-solubilising bacteria (PSB). The results indicated that growth parameters, yield attributes, grain yield, biological yield, and economic returns were significantly influenced by the treatments. The greatest numerical plant heights at 30 DAS (46.8 cm) and 45 DAS (55.9 cm) were recorded under T₁₀, while T₅ recorded comparable values of 45.8 and 55.3 cm, respectively. The highest numbers of pods per plant (39.6) and seeds per pod (13.5), dry matter production (3.50 t ha⁻¹), and test weight (48.1 g) were observed under T₅, whereas the highest numerical chlorophyll content (4.00 mg g⁻¹) was recorded under T₁₀. The highest grain yield (pooled: 1458 kg ha⁻¹) and net return (₹98,855 ha⁻¹) were recorded with 100% RDF (T₅), whereas 75% RDF combined with seed and soil application of Rhizobium + PSB (T₁₀) produced a pooled grain yield of 1400 kg ha⁻¹ and a B:C ratio of 4.41, remaining statistically at par with T₅. Thus, integrated use of biofertilisers with 75% RDF can reduce fertiliser requirement without significant yield loss and improve profitability.

A. Verma, M. Mehriya, Ashish Vishnawat · 0 citations