Maize (Zea mays L.) is an important crop grown for food, feed, and energy. In general, maize yield is decreased due to drought stress during the reproductive stages, and, hence, it is critical to improve the grain yield under drought. A field experiment was conducted with a split-plot design. The main factor was the irrigation regime viz. well-irrigated conditions and withholding irrigation from tasseling to grain filling for 21 days. The subplots include six treatments, namely, (i) the control (water spray), (ii) zinc oxide @ 100 ppm, (iii) manganese oxide @ 20 ppm, (iv) nZnO @ 100 ppm + nMnO @ 20 ppm, (v) Tamil Nadu Agricultural University (TNAU) Nano Revive @ 1.0%, and (vi) zinc sulfate 0.25% + manganese sulfate 0.25%. During drought stress, the anthesis–silking interval (ASI), chlorophyll a and b content, proline, starch, and carbohydrate fractions were recorded. At harvest, the grain-filling rate and duration, per cent green leaf area, and yield traits were recorded. Drought stress increased the proline (38.1%) and anthesis–silking interval (0.45 d) over the irrigated condition. However, the foliar application of ZnO (100 ppm) and nMnO (20 ppm) lowered the ASI and increased the green leaf area, leaf chlorophyll index, and proline content over water spray. The seed-filling rate (17%), seed-filling duration (11%), and seed yield (19%) decreased under drought. Nevertheless, the seed-filling rate (90%), seed-filling duration (13%), and seed yield (52%) were increased by the foliar spraying of nZnO (100 ppm) and nMnO (20 ppm) over water spray. These findings suggest that nZnO and nMnO significantly improve the grain yield of maize under drought stress conditions.

To evaluate the effect of different doses of Nano-urea on yield attributes and yield of pearl millet a field experiment was conducted at Eastern Block Farm of Tamil Nadu Agricultural University, Coimbatore during the Summer of 2022. This field experiment was laid out in Randomized Block Design (RBD) with ten treatments and three replications. In this experiment different doses of Nano-urea were applied along with the Recommended Dose of Nitrogen (RDN) as per the Crop Production Guide, 2020 of TNAU, Coimbatore. The study revealed that yield of pearl millet was significantly differed with treatments imposed. Among these treatments, application of 50% RDN as basal + 0.5% Nano-urea foliar spray @ panicle initiation and booting stage recorded a significantly higher number of productive tillers plant^-1 (3.79), earhead length (26.82 cm), earhead girth (7.9 cm), number of grains earhead^-1 (2,462), test weight (15.64 g), grain yield (3,314 kg ha^-1) and stover yield (5,136 kg ha^-1). Which was at par with treatment 50% RDN as basal + 25% RDN @ panicle initiation + 25% RDN @ booting stage (T₁₀).

Climate change and ensuring food security for a rapidly growing global population are two of the biggest challenges in agriculture. To meet the commitments made in the Paris Climate Agreement, it is important to use effective methods for managing soil that can help sequester and stabilise carbon. Conservation agriculture has a huge potential to sequester carbon in plants and soil, making it a viable option for carbon trading despite its significant contribution to global greenhouse gas emissions. Carbon sequestration can be achieved through sustainable practices such as adopting conservation agriculture, crop rotation, cover crop cultivation, crop residue incorporation or mulching, effective management of nutrient supply to crops, and transforming towards organic agriculture and agroforestry. These practices promote food security and environmental improvement and help mitigate global warming. Carbon pricing mechanisms are policies that impose a cost on carbon pollution, encouraging people and organisations to choose low-carbon options and reduce their emissions. Agricultural producers can benefit from carbon trading by earning extra revenue by selling their excess carbon credits to those who emit higher amounts of greenhouse gases. Carbon credit systems in agriculture are still in the early stages, so farmers may have more opportunities to participate in future carbon trading.

Intercropping presents an opportunity to optimise land use and resource efficiency in cotton cultivation, particularly for small and marginal farmers facing climate-related challenges and rising input costs. This study explores the potential of intercropping short-duration vegetables with cotton to transform this production system into a more economically viable and sustainable one. The study was conducted in the Cotton Department of Tamil Nadu Agricultural University in Coimbatore during the winter irrigated season, from August to January, in both 2020 and 2021. The growth, yield parameters, equivalent yield (3645 and 4234 kg ha⁻¹), and net return (Rs. 123,434 ha⁻¹ and Rs. 154,034 ha⁻¹) were higher in the intercropping system with the paired row planting of Bt cotton with two rows of cluster bean. Upon comparing sole cropping and the paired row method of planting, it was found that adopting the paired row system of planting Bt cotton with two rows of cluster bean was highly profitable in all aspects of crop production. Therefore, the adoption of paired row cropping systems with compatible intercrops that promote synergistic effects on the main crop should be considered for enhancing overall productivity, as well as sustainability.

Maize (Zea mays L.), a nutrient-demanding crop, faces significant challenges when conventional fertilizers are applied excessively, leading to adverse effects such as soil degradation, nutrient leaching and environmental eutrophication. In response to the growing need for sustainable agricultural practices, innovative fertilization techniques and nano-fertilizers have emerged as viable solutions. The present study, conducted during the rabi season (2024) using a randomized block design with 8 treatments and 3 replications to investigate the impact of IFFCO Nano-NPK (8-8-8) foliar fertilizer on maize growth and yield. The study assessed the effectiveness of nano NPK through growth, yield and nutrient uptake measurements. Results indicated that applying a 100% recommended dose of NPK fertilizers (RDF) and two foliar sprays of 1% nano-NPK at critical growth stages (V6-V8 and V11-V12), significantly improved plant growth and yield attributes. Notably, this performance was statistically at par with 75% RDF with two foliar sprays of 1% nano-NPK. These findings suggest that nano-NPK foliar applications can reduce traditional fertilizer use by 25% while maintaining optimal growth, yield and nutrient uptake. Thus, nano-NPK application offers a sustainable pathway for maize production, enhancing nutrient efficiency and reducing fertilizer inputs.

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.