Factors Affecting the Accumulation and Loss of Nitrogen and Organic Carbon in Cropped Soils<sup>1</sup>

Salter, Robert M.; Green, T. C.

doi:10.2134/agronj1933.00021962002500090010x

Cited by 59 publications

(16 citation statements)

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“…2 Present address: Department of Entomology, University of Georgia, Athens, Georgia 30602 USA. way 1909, Russel1929, Burd and Martin 1931, Salter and Green 1933, Hide and Metzger 1939, Haas et al 1957. In contrast, no-till systems reduce the loss of soil organic matter (Lal 1976, Doran l980a, Douglas and Goss 1982, Blevins et al 1983, Rozsypal et al 1983, House et al 1984, Lamb et al 1985.…”

Section: Introductionmentioning

confidence: 99%

Litter Placement Effects on Microbial and Organic Matter Dynamics in an Agroecosystem

Holland¹,

Coleman²

1987

Ecology

529

224

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JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact support@jstor.org.. Ecological Society of America is collaborating with JSTOR to digitize, preserve and extend access to Ecology. Abstract.Two different agricultural tillage practices were used to study how changes in the structure of the soil-litter system affected litter decomposition rates, microbial community composition, and soil organic matter dynamics. Surface straw placement results in spatial separation of carbon-rich litter (C:N ratio 80:1) and mineralized soil nitrogen. In contrast, when the litter is plowed into the soil, straw carbon and soil nitrogen are in intimate contact. Our field studies in Colorado showed that fungal biomass in surfacestraw treatments was 144% of that in the incorporated-straw treatments, probably because fungi, with their extensive hyphal networks, are able to utilize both the surface straw carbon and the available soil nitrogen. Field studies using '4C-labeled wheat straw showed that a greater proportion of added 14C was retained in the surface-straw treatment than in the incorporated-straw treatment. Maximum net N immobilization was higher and litter decomposition was slower in the surface straw than in the incorporated straw placements both with and without experimental nitrogen addition. Slower litter decomposition of the surface litter may contribute to reduced soil organic matter losses. Soil organic matter losses may also be reduced in no-till systems as a result of the increase in the ratio of fungal to bacterial activity because of the greater growth efficiency of fungi and the accumulation of carbon in the less decomposable fungal biomass. The surface placement of straw in no-till agriculture allowed management of microclimate and microbial populations so that losses of soil organic matter and nutrients were minimized.

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Section: Introductionmentioning

confidence: 99%

Litter Placement Effects on Microbial and Organic Matter Dynamics in an Agroecosystem

Holland¹,

Coleman²

1987

Ecology

529

224

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“…Salter and Green (38) period is given in Table 17 of the Appendix. Only the addi tional procedures followed in 1957 and 1958 will be discussed in any detail in this section of the report.…”

Section: B Trends In Soil Organic Matter Accumula Tion or Depletion mentioning

confidence: 99%

Efficiency of legume residue nitrogen and inorganic nitrogen in corn production

Sutherland

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“…Jenkinson and Rayner (1977) developed a soil organic matter model based on ryegrass decomposition from which they found that annual additions of 1 Mg/ha of organic carbon, or a little over 2 Mg/ha of ryegrass, would resuk in a steady state organic carbon content of 0.94%, or 24.26 Mg/ha in the upper 23 cm of soil. Using their model I calculated the increase in in continuous corn and in a 5-yr corn-oats-wheat-clover-timothy rotation (Salter and Green 1933). The curve for SOM in the 5-yr rotation is based on the assumption of an ultimate SOM content 39% less than the uncultivated amount, which is the average SOM loss in the uppermost 15 cm of 107 cultivated Udalfs (Mann 1986).…”

Section: Maintenance Of Soil Organic Mattermentioning

confidence: 99%

Strategies for determining soil-loss tolerance

Alexander

1988

Environmental Management

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Factors Affecting the Accumulation and Loss of Nitrogen and Organic Carbon in Cropped Soils¹

Cited by 59 publications

References 0 publications

Litter Placement Effects on Microbial and Organic Matter Dynamics in an Agroecosystem

Litter Placement Effects on Microbial and Organic Matter Dynamics in an Agroecosystem

Efficiency of legume residue nitrogen and inorganic nitrogen in corn production

Strategies for determining soil-loss tolerance

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Factors Affecting the Accumulation and Loss of Nitrogen and Organic Carbon in Cropped Soils1

Cited by 59 publications

References 0 publications

Litter Placement Effects on Microbial and Organic Matter Dynamics in an Agroecosystem

Litter Placement Effects on Microbial and Organic Matter Dynamics in an Agroecosystem

Efficiency of legume residue nitrogen and inorganic nitrogen in corn production

Strategies for determining soil-loss tolerance

Contact Info

Product

Resources

About

Factors Affecting the Accumulation and Loss of Nitrogen and Organic Carbon in Cropped Soils¹