A quick, accurate and cost-effective method for estimating total soil carbon is necessary for monitoring its levels due to its environmentally and agronomically irreplaceable importance. There are several impediments to both laboratory analysis and spectroscopic sensor technology because the former is both expensive and time-consuming whereas the initial cost of the latter is too high for farmers to afford. RGB photography obtained from digital cameras could be used to quickly and cheaply estimate the total carbon (TC) content of the soil. In this study, we developed models to predict soil TC contents across different cropland types including paddy, upland and orchard fields as well as the TC content of the soil combined from all the aforementioned cropland types on a regional scale. Soil colour measurements were made on samples from the Chungcheongnam-do province of South Korea. The soil TC content ranged from 0.045% to 6.297%. Modelling was performed using multiple linear regression considering the soil moisture levels and illuminance. The best soil TC prediction model came from the upland soil and gave training and validation r values of 0.536 and 0.591 with RMSE values of 0.712% and 0.441%, respectively. However, the most accurate equation is the one that produces the lowest RMSE value. Hence, although the model for the upland soil was the most stable of all, the paddy soil model which gave training and validation r values of 0.531 and 0.554 with RMSE values of 0.240% and 0.199%, respectively, was selected as the best soil TC prediction equation of all due to its comparatively high r value and the lowest RMSE of all equations.
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http://dx.doi.org/10.3390/ijerph19159344 | DOI Listing |
BMC Plant Biol
December 2024
School of Ethnic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China.
Nitrogen (N) is one of the three major elements required for plant growth and development. It is of great significance to study the effects of different nitrogen application levels on the growth and root exudates of Phlomoides rotata, and can provide a theoretical basis for its scientific application of fertilizer to increase production. In this study, Phlomoides rotata were grown under different nitrogen conditions for two months.
View Article and Find Full Text PDFMicrob Cell Fact
December 2024
Botany and Microbiology Department, Faculty of Science, Suez Canal University, Ismailia, 41522, Egypt.
This comprehensive review explores the emergence of titanium dioxide nanoparticles (TiO-NPs) as versatile nanomaterials, particularly exploring their biogenic synthesis methods through different biological entities such as plants, bacteria, fungi, viruses, and algae. These biological entities provide eco-friendly, cost-effective, biocompatible, and rapid methods for TiO-NP synthesis to overcome the disadvantages of traditional approaches. TiO-NPs have distinctive properties, including high surface area, stability, UV protection, and photocatalytic activity, which enable diverse applications.
View Article and Find Full Text PDFBMC Plant Biol
December 2024
State Key Laboratory of Efficient Utilization of Arid and Semi-arid Arable Land in Northern China/ Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, 12 South Road, Zhongguancun, Beijing, Haidian District, 100081, PR China.
Background: The aim of this study is to investigate the effect of soil water stability on maize (Zea mays L.) yield, water use, and its photosynthetic physiological mechanisms, and to innovate the relationship between maize and soil water, which currently only considers soil water content and neglects soil water stability.
Methods: An organized water experiment was conducted on maize.
Sci Bull (Beijing)
December 2024
State Key Laboratory of Desert and Oasis Ecology, Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China.
Microbes Environ
December 2024
Faculty of Agriculture, University of Miyazaki.
We herein investigated the effects of salt (NaCl) stress on soybean nodulation by rhizobial strains. We specifically exami-ned: (1) the effects of NaCl on nodule maturity and positioning by inoculating three rhizobial strains (Bradyrhizobium diazoefficiens USDA110, Bradyrhizobium elkanii USDA31, and Sinorhizobium fredii USDA191) onto soybean variety CNS, (2) the effects of the NaCl treatment on isoflavones (daidzein and genistein) secretion by CNS, (3) the effects of the NaCl treatment on gene expression induced by daidzein and genistein in rhizobia, and (4) the effects of the NaCl treatment on rhizobial growth. The results obtained were as follows: (1) the NaCl treatment delayed nodule development and reduced nodulation on the primary root following the USDA110 inoculation, minimal sensitivity regarding nodule formation in the USDA 31 inoculation, and significantly increased the mature nodule number and nodules on the primary root following the USDA 191 inoculation.
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