A simple procedure for hydroboration using tetrabutylammonium borohydride

1189-119

Impact of nine years of conservation tillage and precise nutrient management on equivalent yields, soil microbial dynamics, and water-energy footprints of the maize–mustard rotation

In South Asian regions, the traditional maize–mustard rotation (MMR) has become less profitable and unsustainable due to inappropriate fertilization practices and the degradation of soil properties. Therefore, climate-smart and sustainable farm practices are necessary to mitigate production risks and improve soil properties. This study evaluated the long-term impacts of conservation tillage and nutrient management on equivalent yields, soil microbial properties, and water-energy savings. A long-term field experiment was initiated 9 years ago, using the split-plot design to evaluate the three conservation tillage (CA)-based crop establishment practices, i.e., zero tillage (ZT) and conventional tillage (CT), permanent beds (PNB). Each practice was accompanied by the recommended dose of fertilizer (RDF), improved RDF (RDFI), and nutrient expert-guided (NEI) fertilization. CA-based tillage (ZT or PNB) resulted in 24.4–25.2% greater maize grain equivalent yields (EY) compared to the CT, while the NEI and RDFI produced statistically (p = 0.05) identical EY, being 26.6–30.3% greater than the RDF. These practices substantially reduced the water footprints, besides 11.9–12.9% and 23.4–26.6% (9-yrs average) greater water productivity compared to CT and RDF, respectively. In fact, at 0–45 cm soil depth, residues retained ZT or PNB had 31.9–42.2%, 56.5–67.2%, and 16.5–18.3% more bacterial (107), fungi (104), and actinomycetes (104) populations, respectively. Across soil depths, ZT or PNB recorded 7.65–11% and 23.2–31.9% greater soil microbial biomass-C and -P, respectively. Compared to CT-based practices, these practices also improved soil mineralizable N (NO3− N/NH4+ N). The conventionally tilled plots consumed greater direct and indirect non-renewable energy than the CA-based residue-retaining practices. By virtue of residue retention, the PNB and ZT had ~108% greater energy input (EI) than the CT, whereas it was vice versa in terms of the energy output (EO). The NEI registered a 7.6–28.7% higher EO than the RDFI and RDF. These long-term field studies demonstrated that adopting CA-based ZT, or PNB, in combination with precise nutrient management would enhance equivalent yields and soil microbial dynamics, besides improving water-energy footprints in maize–mustard growing ecologies

A Comparative Study of Organic Cultivation of Trigreens with Vermicompost

The study highlighting the importance of diversifying plant resources, especially for green leafy vegetables, which are rich in essential nutrients and are considered vital for human health. Organic farming is on the rise due to increasing demand for healthier and environmentally friendly food production. The experiment was conducted in Kalakadu village, Tamil Nadu, India, with a focus on the impact of vermicompost on plant growth. The soil type, pH, and nutrient content were analyzed. Vermicompost was prepared by predigesting organic waste and cattle dung slurry. The three selected vegetables were planted in plots with and without vermicompost, and their growth was monitored. The study presents the height parameters and growth data for each of the three vegetables with and without vermicompost. In all cases (Amaranthus, Palak, and Moringa), the height and weight of the plants were significantly higher when vermicompost was added. Statistical analysis, including Pearson correlation and t-tests, confirmed the significance of these differences. The study concludes that vermicompost has a substantial positive impact on the growth and yield of Amaranthus, Palak, and Moringa. The vegetables cultivated with vermicompost demonstrated higher height, weight, and overall growth compared to those without vermicompost

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Not AvailableOn- farm demonstrations on Trichoderma harzianum were undertaken to empower farmers and show the potential against root rot complex and wilt disease in major pulse crops. Accordingly, a project was implemented during 2008-2011 in six villages with 620 farmers under rainfed conditions of Sumerpur Block, Hamirpur district in Bundelkhand of Uttar Pradesh. The identified native strain of Trichoderma harzianum (IPT 31) was multiplied and supplied to farmers for seed treatment in chickpea, lentil and pigeonpea crops. The results showed that the overall reduction in plant mortality due to root rot complex over control was 32.1% and 14.3% in chickpea and lentil, respectively. However, the reduction in wilt incidence was observed 26.7% in chickpea and 25.9% of lentil. Further, the percent increase in yield over the control was 16.6% and 12.6% in chickpea and lentil, respectively. The additional yield in chickpea and lentil from T. harzianum application was received 1.30 q/ha and 0.93 q/ha with economic gain of 2600 and 2800/ha. The impact of T. harzianum in pigeonpea was observed to a lesser extent. The availability of soil moisture played an important role in effectiveness of Trichoderma. The increase in awareness and knowledge on nature, role and benefits of T. harzianum; methods of application, source of availability and market price was observed between 20 to 70 percent.Not Availabl

Synthesis of novel chiral auxiliaries

1666-1669A simple and easy route for the preparation of the higher homologue of oxazaborolidine namely dihydrooxazaborin has been reported. Also, the preparations of new bicyclic oxazaborolidines are reported

Novel Chiral Switching Ligands for Enantioselective Asymmetric Reductions of Prochiral Ketones

Abstract: The newly developed chiral ligands 1 and 4 show opposite enantioselectivity in the asymmetric reduction of prochiral ketones resulting in the production of either enantiomer depending on the metal complex with high enantiomeric excess

On - farm demonstrations of Trichoderma harzianum in pulse crops under rainfed conditions of Bundelkhand - A case study

On- farm demonstrations on Trichoderma harzianum were undertaken to empower farmers and show the potential against root rot complex and wilt disease in major pulse crops. Accordingly, a project was implemented during 2008-2011 in six villages with 620 farmers under rainfed conditions of Sumerpur Block, Hamirpur district in Bundelkhand of Uttar Pradesh. The identified native strain of Trichoderma harzianum (IPT 31) was multiplied and supplied to farmers for seed treatment in chickpea, lentil and pigeonpea crops. The results showed that the overall reduction in plant mortality due to root rot complex over control was 32.1% and 14.3% in chickpea and lentil, respectively. However, the reduction in wilt incidence was observed 26.7% in chickpea and 25.9% of lentil. Further, the percent increase in yield over the control was 16.6% and 12.6% in chickpea and lentil, respectively. The additional yield in chickpea and lentil from T. harzianum application was received 1.30 q/ha and 0.93 q/ha with economic gain of 2600 and 2800/ha. The impact of T. harzianum in pigeonpea was observed to a lesser extent. The availability of soil moisture played an important role in effectiveness of Trichoderma. The increase in awareness and knowledge on nature, role and benefits of T. harzianum; methods of application, source of availability and market price was observed between 20 to 70 percent

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Not AvailableRhizosphere microbial communities are dynamic and play a crucial role in diverse biochemical processes and nutrient cycling. Soil type and cultivar modulate the composition of rhizosphere microbial communities. Changes in the community composition significantly alter microbial function and ecological process. We examined the influence of soil type on eubacterial and diazotrophic community abundance and microbial metabolic potential in chickpea (cv. BG 372 and cv. BG 256) rhizosphere. The total eubacterial and diazotrophic community as estimated through 16 S rDNA and nifH gene copy numbers using qPCR showed the soil type influence with clear rhizosphere effect on gene abundance. PLFA study has shown the variation in microbial community structure with different soil types. Differential influence of soil types and cultivar on the ratio of Gram positive to Gram negative bacteria was observed with most rhizosphere soils corresponding to higher ratios than bulk soil. The rhizosphere microbial activities (urease, dehydrogenase, alkaline phosphatase and beta-glucosidase) were also assessed as an indicator of microbial metabolic diversity. Principal component analysis and K-means non-hierarchical cluster mapping grouped soils into three categories, each having different soil enzyme activity or edaphic drivers. Soil type and cultivar influence on average substrate utilization pattern analyzed through community level physiological profiling (CLPP) was higher for rhizosphere soils than bulk soils. The soil nutrient studies revealed that both soil type and cultivar influenced the available N, P, K and organic carbon content of rhizosphere soil. Our study signifies that soil type and cultivar jointly influenced soil microbial community abundance and their metabolic potential in chickpea rhizosphere.Not Availabl