A field experiment was conducted at Tamil Nadu Agricultural University, Coimbatore, during the summer of 2024 to determine the physiological, biochemical, and microbial responses of green gram to foliar nutrition of nano-fertilizers. The experiment was carried out in black heavy clay soil (Vertisol). Treatments included recommended doses of fertilizer (RDF) at 100%, 75%, and 50%, each combined with two rounds of foliar sprays using nano urea and nano DAP (first spray and a second spray 15 days later), along with conventional urea and DAP sprays, and a TNAU Pulse Wonder spray. Ten treatments were tested, each replicated three times in a randomized block design (RBD). Physiological (chlorophyll content), biochemical (soluble proteins, nitrate reductase activity), and microbiological (nodule number, microbial population) parameters were recorded at critical growth stages. The combination of 100% RDF with two nano DAP sprays resulted in significantly higher total chlorophyll concentration (increases of 21.4%, 10.7%), soluble protein content (increases of 30.5%, 15.7%), and nitrate reductase activity (increases of 30.1%, 14.7%), with values at par with 75% RDF + nano DAP foliar sprays twice, as well as 100% RDF + TNAU Pulse Wonder in comparison to 100% RDF with conventional DAP sprays, respectively observed after 1st spray. Notably, the 50% RDF + nano DAP significantly increased nodule number and microbial population at critical stages. Overall, the data demonstrated that 75% RDF + foliar spray of nano DAP (twice) has improved physiological and biochemical changes in green gram plants, indicating a potential saving of phosphorus fertilizers by up to 25%. Physiological responses were more pronounced with nano DAP than conventional DAP, likely due to its rapid absorption, quick assimilation and improved use efficiency.

This is a comprehensive review of studies of nano-fertilizers for their efficacy in stimulating plant growth, facilitating higher nutrient uptake and thus enhancing overall crop yield and productivity. The intricate insights into the mechanisms through which nano-fertilizers ensure sustained nutrient release, optimize nutrient absorption and augment nutrient utilization efficiency, have been reviewed. Several scientific studies indicate the potential of nanotechnology to enhance crop performance in terms of better crop growth and higher productivity. Regarding the economic implications of adopting nano-fertilizers, several findings indicate that nano-fertilizers could offer cost advantages over conventional fertilizers, potentially alleviating the government's subsidy burden and reducing import expenses on huge quantities of major commercial fertilizers. This comprehensive review also explores the challenges faced by Indian agriculture in crop production and the potential of nanotechnology to revolutionize productivity on a sustainable basis. The study emphasizes the urgent need for enhanced and sustained crop production and highlights the significance of nano-fertilizer application as an innovative and environmentally friendly solution. In conclusion, this comprehensive overview of the status of stagnant crop production in India identifies the challenges in augmenting productivity and proposes nanotechnology-based fertilizers and their utility in major agricultural crops cultivation as a promising solution. The findings underscore the need for further research and the widespread adoption of nanotechnology-based fertilizers in Indian agriculture to ensure sustainable and enhanced production and productivity.

A field experiment was conducted at wetland farm of Tamil Nadu Agricultural University, Coimbatore during the summer season, 2022 to study the influence of integrated application of basal nitrogen and foliar feeding of nano and conventional urea on growth, physiology, yield parameters, yield and quality attributes of irrigated green gram. The experiment was laid out in Factorial Randomized Block Design (FRBD) with two factors viz, different basal nitrogen dose (N) and foliar supplementation of various concentration of nano and conventional urea at flower initiation (FI) stage and 15 days thereafter (F). There were four levels under each factor namely, N1 - 100 % RDN (Recommended Dose of Nitrogen) (25 kg N ha-1), N2 - 80 % RDN (20 kg N ha-1), N3 - 60 % RDN (15 kg N ha-1) and N4 - Nitrogen free control under factor I. Likewise, F1 - Nano urea @ 2 ml litre-1 of water, F2 - Nano urea @ 3 ml litre-1 of water, F3 - Nano urea @ 4 ml litre-1 of water and F4 - 1 % conventional urea under factor II. The experimental outcomes revealed that the treatment combination of 100 % RDN + foliar spray of nano urea @ 4 ml litre-1 of water at FI stage and 15 days thereafter significantly recorded superior values of plant height, leaf area index, crop growth rate, relative growth rate, net assimilation rate, chlorophyll content, soluble protein content, nitrate reductase activity, fertility co-efficient, grain yield, protein content and protein yield. Nevertheless, it was on par with basal application of 80 % RDN + foliar nutrition of nano urea @ 4 ml litre-1 of water at FI stage and 15 days thereafter. Thus, adoption of 80 % RDN as basal dose integrated with foliar feeding of nano urea @ 4 ml litre-1 of water at FI stage and 15 days thereafter could be the viable integrated nitrogen management practice to enhance the performance of green gram under summer irrigated conditions.

This review examines various weed control strategies for Direct Seeded Rice systems. The diverse weed flora in DSR includes grasses (Echinochloa colona), sedges (Cyperus iria) and broadleaf weeds (Ludwigia parviflora) being prevalent. Integrated weed management combining cultural, mechanical, biological and chemical methods is recommended for sustainable control. Cultural practices such as stale seedbed techniques, crop rotations and flooding help suppress the growth of weeds. Mechanical methods, including hand weeding and the use of weeders, are effective but labour-intensive. Chemical control via pre-emergence (pretilachlor) and post-emergence (bispyribac-sodium) herbicides has shown promising results optimally. This review highlights that an integrated approach utilizing multiple complementary weed management tactics is essential for effective and sustainable weed control in direct-seeded rice. The proper timing of interventions, combinations of methods, and consideration of local conditions are essential factors. Although chemical herbicides are still valuable tools, there is a growing emphasis on reducing their use by integrating alternative methods. Overall, continued review of innovative biological and ecological approaches can further enhance the existing options for weed management in DSR systems.

Sunflowers are a staple crop in global agriculture, with significant production in temperate and semi-arid climates. The cultivated sunflower is notable for its diverse chromosomal configurations and its historical cultivation by Native American tribes. Recent advancements in sunflower genomics have revealed a complex and extensive genome, offering insights into traits critical for breeding, such as oil content, disease resistance, and environmental resilience. Genomic studies have also illuminated the pathways governing drought tolerance and fatty acid composition, improving the breeding of sunflowers tailored to specific agronomic and nutritional needs. Identifying genes associated with disease resistance, particularly against the parasitic weed broomrape, highlights the potential of genomics in safeguarding crop productivity. Overall, the article emphasizes the importance of sunflower genomics in shaping the future of crop improvement and agriculture.

Sesame (Sesamum indicum L.) is the most ancient oilseed crops cultivated by humans, widely known as the ’queen of oilseeds’ due to its high oil content, nutritional richness and health-promoting properties. The global demand for sesame has risen significantly in recent years, largely driven by its excellent oil quality, high protein levels, antioxidant compounds such as sesamin and sesamolin and its remarkable adaptability to a wide range of agro-climatic and soil conditions. Despite being widely grown and self-sustaining in terms of acreage, sesame continues to exhibit low average productivity. This is primarily due to limited genetic improvement, environmental stress susceptibility and poor adaptation to diverse agro-ecological regions. To overcome these challenges, genetic enhancement of sesame is essential. Recent advancements in molecular biology and genomics have opened new avenues for sesame improvement through the use of molecular markers, QTL mapping, mutation breeding and genome-assisted selection. This article aims to explore the genetic approaches currently employed in sesame crop improvement. It highlights the evolutionary history of sesame research, development and utilization of genetic resources, progress in molecular breeding and the challenges faced by breeders. Emphasis is also placed on prospects and the integration of modern biotechnological tools to enhance sesame productivity and resilience.