soil organic matter Articles
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Does physical protection of Soil Organic Matter attenuate temperature sensitivity?
Global climate change may induce accelerated soil organic matter (SOM) decomposition through increased soil temperature, and thus impact the C balance in soils. We hypothesized that compartmentalization of substrates and decomposers in the soil matrix would decrease SOM sensitivity to temperature. We tested our hypothesis with three short-term laboratory incubations with differing physical ...
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Soil organic matter changes in turfgrass systems affect binding and biodegradation of simazine
Concern about pesticide losses from maintained turfgrass areas led us to examine the fate of the triazine herbicide simazine in turfgrass systems and, specifically, interactions between simazine binding to soil organic matter and biodegradation. Soil samples were removed from turfgrass systems of different ages, placed in microcosms, conditioned as sterile or nonsterile, and exposed to ...
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Relationship between light and heavy fractions of organic matter for several agricultural soils in China
Although numerous studies about the nature and turnover of soil organic matter (SOM) in light and heavy fractions (LFOM and HFOM, respectively) have been made, little information is available in relation to the relationship between LFOM and HFOM, and no attempts have been made to quantify a general relationship between LFOM and HFOM for agricultural soils under field condition. Our hypothesis is ...
By IOS Press
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Dryland crop yields and soil organic matter as influenced by long-term tillage and cropping sequence
Novel management practices are needed to improve the declining dryland crop yields and soil organic matter contents using conventional farming practices in the northern Great Plains. We evaluated the 21-yr effect of tillage and cropping sequence on dryland grain and biomass (stems + leaves) yields of spring wheat (Triticum aestivum L.), barley (Hordeum vulgare L.), and pea (Pisum sativum L.) and ...
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Advantages and precautions of NPK organic fertilizer granulator
The humus in organic fertilizer increases the content of soil organic matter, which is beneficial to the formation of good soil structure, especially the increase of water stable aggregate structure, so as to improve the tightness, aeration, water retention and heat status of soil, and has a good effect on the water, fertilizer, air and heat conditions that determine the soil fertility. It is ...
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Six effects of organic matter on maintaining soil fertility
The content of soil organic matter is closely related to the level of soil fertility. Although organic matter only accounts for a small part of the total amount of soil, it plays a significant role in maintaining soil fertility. The manufacturer of organic fertilizer production equipment introduces six important functions of organic matter to maintain soil fertility. 1. Provide nutrition for ...
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Healthy soil is essential to a circular economy
To achieve the Dutch government's objective of realising a circular economy in the Netherlands, it is essential to maintain the productivity of the country's farmland. Healthy soil produces renewable raw materials for biobased products. However, declining carbon levels in arable Dutch soil is inhibiting our ability to meet this objective, and continued global warming is standing in the way of a ...
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Dynamics of atmospheric nitrogen deposition in a temperate calcareous forest soil
In temperate forest ecosystems, soil acts as a major sink for atmospheric N deposition. A 15N labeling experiment in a hardwood forest on calcareous fluvisol was performed to study the processes involved. Low amounts of ammonium (15NH4+) or nitrate (15NO3–) were added to small plots. Soil samples were taken after periods ranging from 1 h to 1 yr. After 1 d, the litter layer retained approximately ...
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Progressive N limitation of plant response to elevated CO2: a microbiological perspective
Abstract A major uncertainty in predicting long-term ecosystem C balance is whether stimulation of net primary production will be sustained in future atmospheric CO2 scenarios. Immobilization of nutrients (N in particular) in plant biomass and soil organic matter (SOM) provides negative feedbacks to plant growth and may lead to progressive N limitation (PNL) of plant response to CO2 ...
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Distribution and possible immobilization of lead in a forest soil (Luvisol) profile*
Geochemical analyses using a sequential extraction method and lead adsorption studies were carried out in order to characterize the distribution and adsorption of lead on each genetic horizon of a Luvisol profile developed on a pelagic clayey aleurolite. Clay illuviation is the most important pedogenic process in the profile studied. Its clay mineralogy is characterized by chlorite/vermiculite ...
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Spatial prediction of soil organic matter content using cokriging with remotely sensed data
Accurately measuring soil organic matter content (SOM) in paddy fields is important because SOM is one of the key soil properties controlling nutrient budgets in agricultural production systems. Estimation of this soil property at an acceptable level of accuracy is important; especially in the case when SOM exhibits strong spatial dependence and its measurement is a time- and labor-consuming ...
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Soil organic matter content effects on dermal pesticide bioconcentration in American toads (Bufo americanus)
Pesticides have been implicated as a major factor in global amphibian declines and may pose great risk to terrestrial phase amphibians moving to and from breeding ponds on agricultural landscapes. Dermal uptake from soil is known to occur in amphibians, but predicting pesticide availability and bioconcentration across soil types is not well understood. This study was designed to compare uptake ...
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Summer cover crop and management system affect lettuce and cantaloupe production system
Cover crops are widely used in both conventional and organic systems to protect and improve the soil. This study evaluated the effect of summer cover crop and management system on the production of fall romaine lettuce (Lactuca sativa L.) and spring cantaloupe (Cucumis melo L.) from 1999 to 2003. Cover crop treatments included cowpea [Vigna unguiculata (L.) Walp.] incorporated (CPI), cowpea used ...
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High Capacity Organic Fertilizer Drum Granulator Manufacturing Process
Drum granulator organic fertilizer manufacturing process is a complete organic fertilizer making line, used for organic waste recycling process to make fertilizer, suit mass fertilizer production. Rotary drum granulator is one of the key fertilizer machine equipment of the organic fertilizer and compound fertilizer industry. The products produced by this drum granulator organic fertilizer ...
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Fertilizer vs. organic matter contributions to nitrogen leaching in cropping systems of the Pampas: 15N application in field lysimeters
Abstract Nitrogen (N) export from soils to streams and groundwater under the intensifying cropping schemes of the Pampas is modest compared to intensively cultivated basins of Europe and North America; however, a slow N enrichment of water resources has been suggested. We (1) analyzed the fate of fertilizer N and (2) evaluated the contribution of fertilizer and soil organic matter (SOM) to N ...
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Soil CO2 efflux in uneven-aged managed forests: temporal patterns following harvest and effects of edaphic heterogeneity
AbstractForest management is expected to influence soil CO2 efflux (FCO2) as a result of changes in microclimatic conditions, soil properties, and root dynamics. We measured FCO2 during the growing seasons of 2003 and 2004 in both gap and non-gap locations within stands ranging from 0 to 10 years after the most recent harvest in a selection-managed northern hardwood forest in central Ontario, ...
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Decomposition of carbon-14-labeled organic amendments and humic acids in a long-term field experiment
The stabilization of soil organic matter (SOM) is an important process in the context of global change and is strongly affected by soil use and management. We investigated the mineralization and stabilization of 14C-labeled wheat (Triticum aestivum L.) straw and 14C-labeled farmyard manure under different cropping systems (crop rotation, monoculture, and bare fallow) in a long-term field ...
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Organic Matter: Key for sustainable agriculture
The growth in human population has had an important impact on soil and the services and resources it can provide. The consequences of human activities on soil resources resulted in the loss of biodiversity, accelerated erosion, desertification, compaction, nutrient depletion, and loss of soil organic matter (SOM), which is primarily made up of carbon (58%). Considerable losses of soil carbon ...
By SOILCARES
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Controls on the sorption, desorption and mineralization of low-molecular-weight organic acids in variable-charge soils
Understanding the controls on interactions between soluble organic compounds and the solid soil matrix is important in understanding soil organic matter dynamics in general, including specific impacts on pedogenic processes, nutrient bioavailability, and C sequestration. This study investigated the pH-dependent relationship between low-molecular-weight organic acids (LMWOAs) and variable-charge ...
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Organic fertilizer production machinery can improve soil organic matter content
With the promotion of consumption, energy saving and consumption reduction, and the improvement of green food demand, organic fertilizer ushers in a greater development opportunity. Then the following fertilizer production line manufacturers, will also usher in a new development and innovation. Organic fertilizer equipment can help improve soil, but we are optimistic about organic fertilizer ...
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