Deficiency of sulfur (S) has been recognized for both dry and wetland plants as a significant growth limiting factor. S-oxidizers enhance the oxidation rate of S and increase sulfate (SO₄^− 2) production by making them available in critical growth stages, resulting in higher plant growth and yield. A two-phase study was undertaken to assess the effectiveness of microbial redox reactions on soil nutrient bioavailability and crop growth. In the first phase isolation of S bacteria was carried out while in the second phase, a pot experiment was conducted and these bacteria were evaluated as a nutrient source along with different ratios of NPK fertilizer by growing canola (Brassica napus) as a test crop. Treatment combinations were, viz., Control (no inoculum), ½ NPK fertilizer (50, 30, and 25 kg ha⁻¹), Full NPK fertilizer (100, 60, and 50 kg ha⁻¹), ½ NPK+SOB, ½ NPK+SRB and ½ NPK+SOB+SRB. Sulfur oxidizing bacteria (SOB) strains were isolated from samples and then screened based on pH reduction (in thiosulphate broth). Sulfur-reducing bacteria (SRB) are characterized by their anaerobic energy metabolism based on the dissimilatory reduction of SO₄⁻² to hydrogen sulfide (H₂S) or S ° to be useful for SOB. Among different bacterial consortiums, the best results for nutrient bioavailability (macro- and micronutrient) in soil and plant the treatment ½ NPK+SOB+SRB compared to full NPK increased soil N, P, K, and SO₄ by 15.9%, 38%, 2.0%, and 72%, respectively. In plants, it boosted N, K, and SO₄ by 7.7%, 31%, and 239%, respectively. The greatest pH reduction (4%) was observed with ½ NPK+SOB relative to full NPK. This study demonstrates that microbial inoculation along with ½ NPK increases the bioavailability of macro- and micronutrients for crops.

Soilless agriculture is acknowledged worldwide because it uses organic leftovers as a means of supporting intensive and efficient plant production. However, the quality of potting media deteriorates because of lower nutrient content and excessive shrinkage of most organic materials. A current study was undertaken to identify the optimal blend of locally available organic materials with desirable qualities for use as potting media. Therefore, different ingredients, viz., Pinus roxburghii needles, sugarcane bagasse, and farmyard manure were used alone or in combination as potting media to test their suitability by growing spinach as a test crop. Results showed that an increase in Pinus roxburghii needles and sugarcane bagasse decreased medium pH and electrical conductivity. Higher pH and electrical conductivity were recorded for the treatments having a higher farmyard manure ratio (≥50%) in combination. Except for pine needles 100%, pH and electrical conductivity were in the recommended range. The growth attributes include, leaves plant^-1, shoot length, fresh- and dry shoot weight along with plant macronutrients (nitrogen, phosphorous, and potassium) and micronutrients (iron, copper, manganese, and zinc) content were higher in treatment pine needles 50%+farmyard manure 50% followed by pine needles 25%+farmyard manure 50%+sugarcane bagasse 25%. Moreover, the particular treatment of pine needles 50%+farmyard manure 50% exhibited the highest concentrations of macro- (nitrogen, phosphorus, and potassium) as well as micronutrients (iron, copper, manganese, and zinc) in the potting media following the harvest. This study highlights the potential of utilizing agro-industrial litter/waste as a soilless growing medium for spinach production under greenhouse conditions. When employed in appropriate proportions, this approach not only addresses disposal concerns but also proves effective for sustainable cultivation. Further research is needed to investigate the use of these wastes as potting media by mixing various particle-size ingredients.

In the recent past, population explosion across the globe has presented many challenges that include the availability of arable land diminishing per capita for traditional soil-based farming. Therefore, the development of advanced agricultural technologies and methods has become important in response to these persistent situations. Amongst these innovations, soilless crop cultivation has emerged as one of the promising solutions, leading from the forefront. This current review offers a comprehensive investigation of hydroponics as an advanced technology for vegetable production. It explains many aspects related to hydroponic systems, viz., methods used in hydroponics, its advantages, challenges as well as application in vegetable production. This paper also explores the hydroponics evolution historically, various hydroponic systems, their essential components, and nutrient solution role in plant growth facilitation. Furthermore, it highlights various advantages of farming under hydroponic culture, viz., increase in yields, efficient usage of water, optimum space utilization, and less environmental impact. Additionally, this review also sheds light on challenges related to hydroponics, like initial setup cost, technical complexity, and management of diseases. Moreover, it also enlightens about vegetables that are suitable to cultivate under hydroponic culture and provides insight into continuing research, and forthcoming projections in the area of vegetable production under hydroponic cultivation.

The aim of the study was to understand the relationships among yield-related characteristics in eight different tomato genotypes. This research analyzed the correlations between these traits across the selected genotypes. Analysis of variance showed significant variations among all traits examined. Branches per plant was positively correlated to plant height, clusters per plant, flowers per cluster, fruit length, fruits per cluster, fruit setting percentage, fruit weight, and overall fruit yield per plant. Height of plants has shown positive relationship with clusters per plant, fruit length, fruit weight, fruits per cluster, fruits per plant and yield per plant. Clusters per plant has positive association with flowers per cluster, fruits per cluster, fruit length, fruit weight, and yield per plant. Additionally, flowers per cluster were positively correlated with fruit length. Fruits per cluster demonstrated positive correlation with fruits per plant, fruit length, fruit weight, and fruit yield per plant. Fruits per plant also exhibited a positive correlation with fruit setting percentage, fruit weight, and total yield per plant. Furthermore, fruit length was positively linked to fruit weight and yield per plant. Lastly, the fruit setting percentage showed a positive association with both fruit weight and fruit yield, while fruit weight had a strong positive association to yield per plant.