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This work demonstrates an ability to estimate topsoil organic matter content from field observations alone and provides a method by which rapid and cost-effective assessments of soil organic matter status may be made.
Moreover, the organic matter of agricultural soil, which is most stable and has been naturally matured over a long period of time, differs substantially from the other samples.
Data presented here clearly show effects of carbon input and soil texture on equilibrium organic matter content.
The method presented seems able to characterize soil organic matter with respect to its availability and its mode of association with the soil matrix.
Together they reflect the diverse but central effects that organic matter has on soil properties and processes.
The results indicate that additions of organic matter from various sources differ in the effects on soil organic matter and biological activity.
This accorded with observed compositions of the soil organic matter.
Therefore, these variables provided complementary information about the condition of soil organic matter in the study area.
The results were in line with the chemical composition of soil organic matter.

Related Questions

What is soil organic matter?5 answersSoil organic matter refers to all organic carbon-containing substances in the soil, ranging from relatively undecomposed plant litter and microbial remains to highly polymerized, stable products of degradation and synthesis. It includes plant and animal residues at various stages of decomposition, such as fresh undecomposed materials, partially decomposed products, and well-decomposed humus. Soil organic matter is composed of carbon and other elements and is a dynamic component of the soil, with inputs from plant detritus and processing by microorganisms. It plays a crucial role in many soil functions and ecosystem services, such as providing food for microorganisms, storing nutrients, retaining water, acting as mulch, and improving soil structure and fertility. Soil organic matter also contributes significantly to the sequestration of carbon.
How can soil organic carbon be estimated?5 answersSoil organic carbon can be estimated using various methods. One approach is to collect soil samples and analyze them in a laboratory. Another method involves in-situ assessment using the soil combustion method, where a metal tube with a heating probe is used to heat the soil and measure the accumulated CO2 concentration to estimate soil organic carbon. Additionally, modeling cause-and-effect relationships among soil processes can improve the generalizability of prediction models for soil organic carbon estimation. Geostatistical methods such as kriging combined with land use, ordinary kriging, inverse distance weighting, and radial basis function can also be used to predict the spatial distribution patterns of soil organic carbon content and density. These methods provide valuable insights into soil composition and are essential for ecological studies, climate change research, and agricultural productivity.
How do you apply organic matter to soil?9 answers
What is a good organic matter percentage in soil?9 answers
What soil horizon has the most organic matter?7 answers
What type of soil is high in organic matter?10 answers

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What is the standard number result for proximate analysis of organic feeds that is used by laboratories?
5 answers
The standard number results for proximate analysis of organic feeds used by laboratories typically include parameters such as ash content, moisture content, lipid content, fiber content, protein content, and carbohydrate content. These values are crucial for assessing the nutritional composition of organic feeds. Proximate analysis methods approved by the Association of Official Analytical Chemists (AOAC) are commonly employed in laboratories to determine these components with precision and accuracy. For instance, in the analysis of fish feeds, proximate composition results showed ranges for various components like ash, moisture, lipid, fiber, protein, and carbohydrate content. Similarly, in the evaluation of organic solid waste from craft beer for feeding sows, parameters such as ash, ethereal extract, crude fiber, nitrogen-free extract, crude protein, and total digestible nutrients were determined. These standardized results play a vital role in assessing the quality and nutritional value of organic feeds in laboratory settings.
Among cocopeat and peatmoss, which supporting media gives higher performance of lettuce and pakchoi?
5 answers
Based on the research findings, cocopeat is a more effective growing medium compared to peatmoss for the cultivation of lettuce and pakchoi. Cocopeat has shown superior results in terms of plant yield, shoot height, and leaf width. Additionally, cocopeat has been found to promote better growth and yield parameters for leafy vegetables in hydroponic systems, making it a favorable choice for cultivating lettuce and pakchoi. On the other hand, peatmoss was not specifically mentioned in the provided contexts regarding its performance with lettuce and pakchoi. Therefore, based on the available data, cocopeat emerges as the preferred growing medium for optimal growth and yield of lettuce and pakchoi.
What factors affect the fragility of organomineral fertilizer granules?
5 answers
The fragility of organomineral fertilizer granules is influenced by various factors. Mechanical strength, a key property, varies based on the pellet's geometric parameters. The deformation behavior under load, moisture content, and organic composition contribute to the granules' fragility. For instance, compression tests revealed that the granules undergo deformation and multiple failures without disintegration, showcasing their fragility when subjected to vertical loads. Additionally, the size distribution of the granules plays a crucial role, with optimal diameters between 1.10 and 5.50 mm for effective application and handling. These findings highlight the importance of considering mechanical properties, moisture content, and particle size distribution in determining the fragility of organomineral fertilizer granules.
How does the use of fertilizers affect soil quality and biodiversity in the Philippines?
5 answers
The use of fertilizers in the Philippines significantly impacts soil quality and biodiversity. Chemical fertilizers, including nitrogenous, phosphate, and potassium fertilizers, enhance crop productivity but also alter soil properties, leading to a decline in soil organic matter content and fertility. Continuous use of chemical fertilizers can harden the soil, reduce fertility, and diminish important soil nutrients, posing hazards to the environment and soil biodiversity. To address soil fertility issues, a combination of organic and inorganic fertilizers is recommended for better yield and soil health, especially for new hybrid corn varieties. Additionally, the implementation of advanced techniques like Residual Neural Networks for predicting soil macronutrients based on soil pH can aid in efficient fertilizer management and soil health maintenance in the agricultural sector.
Why does soil pH decreases after weeks of compost application?
5 answers
Soil pH decreases after weeks of compost application due to the acidifying effect of compost materials. The addition of compost, especially when combined with elemental sulfur, leads to a reduction in pH levels in the soil. Composts react differently to amendments, with elemental sulfur being more efficient in lowering pH compared to ferrous sulfate. The acidic nature of compost causes a decrease in soil pH, along with the release of acids and leaching of certain elements like sodium, contributing to the pH reduction. Additionally, the use of Sandwich compost made from food waste can stabilize soil pH to a neutral level after a few weeks of restoration, further highlighting the pH-modifying effects of compost.
What is the best annealing temperature of Gapdh to amplify Fusarium?
5 answers
The best annealing temperature for amplifying Fusarium would depend on the specific Fusarium species being targeted. For Fusarium solani and F. tricinctum, which are important root rot pathogens of soybean, different optimal temperatures were observed. F. solani showed the greatest infection at 20°C in Glyndon sandy loam soil, while F. tricinctum exhibited the highest infection at 15°C in La Prairie silt loam soil. These findings suggest that for amplifying Fusarium species related to soybean root rot, a temperature range between 15°C to 20°C could be suitable, with specific preferences depending on the Fusarium strain. It is essential to consider the environmental conditions and soil types when determining the ideal annealing temperature for amplifying Fusarium species associated with soybean root diseases.
Why C: N value is high due to litterfall?
5 answers
The high C:N value in litterfall is influenced by various factors observed in different forest ecosystems. Studies show that the C:N ratio in leaf and branch litters is significantly higher in conifer forests compared to broadleaved forests. This difference indicates a higher nitrogen return and lower nutrient return to the soil in conifer forests, impacting the overall nutrient cycling. Additionally, the quality and chemical composition of litterfall play a crucial role in determining the decomposition rate, with broadleaved forests exhibiting faster litter decomposition and higher macronutrient returns than conifer forests. The impact of pine wilt disease on pine stands further emphasizes how forest health and disturbances can affect the C and N content of litterfall, showcasing the intricate relationship between ecosystem dynamics and nutrient cycling.
Why C: N ratio in soil is higher due to litterfall?
5 answers
The C:N ratio in soil is influenced by litterfall due to the decomposition dynamics of different litter types. Slowly decomposing litter types result in a higher transfer of carbon (C) and nitrogen (N) to the soil, favoring soil C and N storage. Additionally, the quality of litter, such as the C:N ratio, plays a significant role in determining the rate of N release during decomposition. Litter decomposition contributes to nutrient cycling, with broadleaved forests showing faster decomposition rates and higher macronutrient returns compared to conifer forests. The interaction between plant, litter, and soil stoichiometric characteristics along elevational gradients further influences the nutrient relationships in ecosystems, highlighting the importance of understanding these dynamics for nutrient cycling in forest ecosystems.
The research gap of compost? the limition of compost in agriculture?
5 answers
The research gap in composting lies in limited studies on substrate formulation, poor control of operational variables, lack of field-level investigations, technological feasibility of scale-up processes, and economic viability with cost-benefit analysis. Compost limitations in agriculture include the presence of microplastics (MPs) in municipal solid waste (MSW) compost, which act as vectors for toxic contaminants, impacting soil properties and inhibiting plant growth. Additionally, compost application requires technical improvements for optimal effects on soil and crops, with precision farming machinery aiding in the efficient incorporation of compost into the soil, leading to increased biological soil activity over time. Moreover, the use of probiotics in composting can reduce composting time and control odors, enhancing the quality of compost fertilizer.
How does soil warming influence the mycorrhizal imprint on soill biogeochemistry?
5 answers
Soil warming has significant implications for mycorrhizal associations and soil biogeochemistry. Studies show that warming can alter the molecular composition of soil organic matter (SOM), accelerating decomposition. Additionally, warming influences the structure of fungal communities, potentially favoring saprotrophs over mycorrhizal fungi, leading to increased soil organic matter breakdown and nitrogen mineralization. Mycorrhizal associations play a crucial role in mediating plant responses to soil warming, affecting plant performance, rhizosphere microbial communities, and ecosystem processes. Furthermore, mycorrhizae can stimulate belowground carbon inputs, inhibit saprotrophic fungi growth, and facilitate soil carbon sequestration, acting as a positive mitigation strategy against increased SOM decomposition in a warmer world. Overall, soil warming can disrupt the delicate balance between mycorrhizal fungi and saprotrophs, impacting soil biogeochemical cycles and ecosystem responses.
How much co2 is absorbed by trees each year?
4 answers
Trees play a crucial role in absorbing CO₂ from the atmosphere annually. Different tree species exhibit varying levels of CO₂ absorption. Studies have shown that Melia azedarach, Swietenia macrophylla, Cassia fistula, and Pterocarpus indicus assimilated 38.15, 9.65, 32.19, and 19.14 kilograms tree⁻¹ yr⁻¹ of CO₂ at the canopy level, respectively. Additionally, a study comparing different tree species found that Larix sibirica, Betula platyphylla, and Pinus sylvestris absorbed varying amounts of CO₂ due to environmental conditions. Overall, the annual net uptake of CO₂ by forests can range from 1.4 to 2.8 metric tons of carbon per hectare, with fluctuations influenced by factors like photosynthesis, respiration, and climate variations.