[PDF] Top 20 The changes of soil nitrogen and carbon contents in a long term field experiment under different systems of nitrogen fertilization
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The changes of soil nitrogen and carbon contents in a long term field experiment under different systems of nitrogen fertilization
... of soil organic N and C compared to the non-fertilized control ...treatment. Soil organic matter, represented here as the C hws content, is more rapidly decomposed after the application of sewage sludge ... See full document
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Evaluating of soil sulfur forms changes under different fertilizing systems during long term field experiments
... air-dried soil samples (< 2 mm) from the beginning (year 1996) of the experiment and from the end of each crop rotation (years 1999, 2002, 2005, 2008, 2011 and 2014) were chosen for ... See full document
8
Nitrous oxide emissions from the soil under different fertilization systems on a long term experiment
... of nitrogen applied in the mineral- organic and organic fertilization systems can be respectively approximated as ...the soil was measured in situ by means of the infrared spectroscopy using a ... See full document
8
Soil carbon transformation in long-term field experiments with different fertilization treatments
... low values of the released carbon (Figure 4c,d). With respect to the treatment and site, it was 0.084% to 0.128% of C org (Figure 3b). At hot water extraction, a slightly mineralizable fraction should be released ... See full document
9
Effects of Long Term Fertilization on Organic Carbon and Nitrogen Dynamics in a Vertisol in Eastern China
... with different cha- racteristics of stability and turnover, and the distribution of these pools is af- fected by soil management factors, such as crop rotation systems and fertilizer application ... See full document
19
Long-term management changes in topsoil and subsoil organic carbon and nitrogen dynamics in a temperate agricultural system
... N contents was evident not only in the top ...SOC under long-term grass in the first decade of the ...the soil were reduced, with a reduction in the delivery of colloid-bound or ... See full document
11
Response of organic nitrogen in Black Soil to long term different fertilization and tillage practices in Northeast China
... Fallow systems are widely used in South America, Asia, and Africa as a strategy to restore soil fertility without purchasing external inputs, and are often suc- cessful in maintaining productivity in low ... See full document
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Dissolved organic carbon and dissolved nitrogen in soil under different fertilization treatments
... from long- term field experiments Debska (2004), Debska and Gonet (2002) showed that under fixed fertilization and crop rotation conditions the content of DOC in TOC is about the same ... See full document
9
Effect of long‐term drainage on plant community, soil carbon and nitrogen contents and stable isotopic (δ13C, δ15N) composition of a permanent grassland
... grassland systems, drainage primarily results in a reduced risk of turf damage by cattle or machines and therefore promotes early access of the cattle to the meadow (Morris, ...of nitrogen fertilizers ... See full document
21
Effects of tillage practices and rate of nitrogen fertilization on crop yield and soil carbon and nitrogen
... and nitrogen fertilizer ap- plication on the total agricultural environment (Habtegebrial et ...2007). Soil C:N ratio is related to N immobilization and mineralization during organic matter decompo- sition ... See full document
5
Soil pH changes in long term field experiments with different fertilizing systems
... The changes of soil pH in long-term 14-year field experiments with different fertilizing systems are ...The field experiments were located at four sites of the ... See full document
5
Study on some soil quality changes obtained from long term experiments
... causes soil structure degradation and as a result it leads to changes in soil fertility and ...compare soil aggregate stability (SAS) and soil or- ganic matter (OM) quantity and quality ... See full document
6
Fluctuations of nitrogen levels in soil profile under conditions of a long term fertilization experiment
... varied long-term fertilization and changes in soil nitrogen ...all fertilization systems significantly increased the levels of total, mineral and organic ... See full document
7
Nitrogen balance and mineral nitrogen content in the soil in a long experiment with maize under different systems of N fertilization
... identical contents of N min in the years of observation for the control, AS and manure ...high contents of residual nitrogen in the topsoil after maize harvest can be a po- tential source of ... See full document
6
Effect of long-term fertilization on soil aggregate-associated dissolved organic nitrogen on sloping cropland of purple soil
... A long- term field experiment was initiated in ...The experiment includes two crops per year, wheat (from October to May next year) and maize (from May to ...The contents of ... See full document
6
Effect of biowaste compost and nitrogen fertilization on water properties of Mollic-gleyic Fluvisol
... matter contents of many agricultural soils (Aggelides and Londra, ...of nitrogen fertilization appears be very low initially for fertile soils, but may increa- se during long-term ... See full document
6
Comparison of the effect of various long-term fertilization systems on the content and fractional composition of humic compounds in Lessive soil
... A field experiment was established in 1972 on ...total nitrogen and II – balanced with CM in terms of the amount of introduced total organic carbon (C tot ...the experiment was ... See full document
9
Effects of increasing fertilization in organic farming fodder cultivation and market crop systems
... P contents of the soil will change accord- ing to the input of organic manures in an organic long-term trial in the ...the soil was increased and the P dynamic was changed in the ... See full document
17
N2O emission and nitrogen and carbon leaching from the soil in relation to long term and current mineral and organic fertilization – a laboratory study
... the soil with increasing soil ...O soil emission was observed after the rewetting of the soil, whereas subsequent irrigations applied at monthly intervals had a smaller yet noticeable effect ... See full document
8
Organic Carbon, Nitrogen and Phosphorus Contents of Some Soils of Kaliti Tea_Estate, Bangladesh
... (AP) contents of the soils along with the standard deviations for each ...Organic carbon contents of the soils are found to be medium and ranged from ...organic carbon content is thought to be ... See full document
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