U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PubAg

Main content area

You searched for: Journal name Soil Science Society of America journal Remove constraint Journal name: Soil Science Society of America journal Publication year rev 8000-2000 Remove constraint Publication year rev: 8000-2000 Source 2000 v.64 no.4 Remove constraint Source: 2000 v.64 no.4
Start Over

Search

36  Search Results

« Previous | 1 - 20 of 36 |
Number of results to display per page

Search Results

1. Crop Rotations and Nitrogen Fertilization to Manage Soil Organic Carbon Dynamics

Author:
Guillermo A. Studdert; Hernán E. Echeverr ı ´ a
Source:
Soil Science Society of America journal 2000 v.64 no.4 pp. 1496-1503
ISSN:
0361-5995
Subject:
Argiudolls; Glycine max; Helianthus annuus; Paleudolls; Triticum aestivum; Zea mays; conventional tillage; corn; crop rotation; crops; fertilizer application; nitrogen; nitrogen fertilizers; production technology; soil organic carbon; soybeans; spring wheat; summer; Argentina
Abstract:
... Sustainability is influenced in many production systems by the variation of soil organic C (SOC) content and dynamics, and crop rotations. We hypothesized that arable layer SOC under conventional tillage can be managed through the amount of residue C (RC) returned to the soil as affected by tillage and fertilization. Soil organic C dynamics of a complex of Typic Argiudoll and Petrocalcic Paleudoll ...
DOI:
10.2136/sssaj2000.6441496x

2. Decrease in Humification of Organic Matter with Intensified Lowland Rice Cropping A Wet Chemical and Spectroscopic Investigation

Author:
D. C. Olk; G. Brunetti; N. Senesi
Source:
Soil Science Society of America journal 2000 v.64 no.4 pp. 1337-1347
ISSN:
0361-5995
Subject:
Fourier transform infrared spectroscopy; amides; calcium; carbohydrates; copper; crops; electron paramagnetic resonance spectroscopy; elemental composition; farms; fertilizer application; field experimentation; fluorescence; free radicals; humic acids; humification; iron; irrigation; moieties; oxidation; research institutions; rice; rice soils; soil organic matter; spectral analysis; submergence; vanadyl ions; wavelengths; Asia
Abstract:
... To address recent concerns of impaired nutrient cycling in intensively cropped lowland rice soils of tropical Asia, we have been investigating the effects of continuous rice cropping on the chemical nature of soil organic matter (SOM). In this study, the labile mobile humic acid (MHA) fraction and the more recalcitrant calcium humate (CaHA) fraction were extracted from soils of four long-term fiel ...
DOI:
10.2136/sssaj2000.6441337x

3. Degradation of 13C–U–Glucose in Sphagnum majus Litter Responses to Redox, pH, and Temperature

Author:
Inger Bergman; Peter Lundberg; Caroline M. Preston; Mats Nilsson
Source:
Soil Science Society of America journal 2000 v.64 no.4 pp. 1368-1381
ISSN:
0361-5995
Subject:
Sphagnum; aerobic conditions; anaerobic conditions; carbon dioxide; ethanol; fungi; glucose; humus; liquids; magnetism; mannitol; methane; microbial biomass; microbial communities; microbial growth; nuclear magnetic resonance spectroscopy; pH; peat; peat soils; polysaccharides; temperature; triacylglycerols; volatile fatty acids
Abstract:
... We studied the utilization of ¹³C–U–glucose by the microbial community in shallow Sphagnum majus (Russ.) C. Jens. ssp. norvegicum Flatb. litter and its regulation by pH, temperature, and redox conditions. The transformation of ¹³C–glucose was monitored by solution- and solid-state ¹³C–nuclear magnetic resonance (NMR) spectroscopy. The aerobic microbial community used the glucose C for respiration ...
DOI:
10.2136/sssaj2000.6441368x

4. Factors Affecting Measurement of the Near-Saturated Soil Hydraulic Conductivity

Author:
Vincenzo Bagarello; Massimo Iovino; Giuseppa Tusa
Source:
Soil Science Society of America journal 2000 v.64 no.4 pp. 1203-1210
ISSN:
0361-5995
Subject:
hydraulic conductivity; infiltration rate; infiltrometers; sandy loam soils
Abstract:
... Different techniques and different technique application procedures are available to determine soil hydraulic conductivity (K). The objective of this study was to determine the dependence of the K values on the selected technique and application procedure. Soil hydraulic conductivity was determined on a sandy loam soil in the near-saturated zone by the pressure infiltrometer, the tension infiltrom ...
DOI:
10.2136/sssaj2000.6441203x

5. Impact of Preferential Flow on the Transport of Adsorbing and Non-Adsorbing Tracers

Author:
K.-J. S. Kung; T. S. Steenhuis; E. J. Kladivko; T. J. Gish; G. Bubenzer; C. S. Helling
Source:
Soil Science Society of America journal 2000 v.64 no.4 pp. 1290-1296
ISSN:
0361-5995
Subject:
bromides; chlorides; conventional tillage; field experimentation; irrigation; monitoring; no-tillage; preferential flow; rain intensity; rainfall simulation; rhodamines; soil profiles; tracer techniques
Abstract:
... Field experiments were conducted by using a tile drain monitoring facility to determine the impact of preferential flow on the transport of adsorbing and non-adsorbing tracers. Simulated rainfall with 7.5 mm h⁻¹ intensity and 7.5 h duration was applied to a 18- by 65-m no-till plot. After 72 min of irrigation, a pulse of Br⁻ and rhodamine WT (water tracer) was applied through irrigation, and 4 h l ...
DOI:
10.2136/sssaj2000.6441290x

6. Impacts of the Real and Imaginary Components of Relative Permittivity on Time Domain Reflectometry Measurements in Soils

Author:
G.C. Topp; S. Zegelin; I. White
Source:
Soil Science Society of America journal 2000 v.64 no.4 pp. 1244-1252
ISSN:
0361-5995
Subject:
clay fraction; equations; ions; monitoring; salts; soil solution; time domain reflectometry; water content
Abstract:
... Time domain reflectometry (TDR) is widely used for routine field monitoring of water content and salts in soils. Most estimates of water content assume the TDR-measured apparent relative permittivity, ϵₐ, is a good approximation for the real component, ϵ′ ᵣ, of the soil's complex relative permittivity with the magnitude of ϵ′ ᵣ being determined primarily by water content. We examine this assumptio ...
DOI:
10.2136/sssaj2000.6441244x

7. Modeling nutrient uptake using a moving boundary approach Comparison with the barber-cushman model

Author:
Juan C. Reginato; Mar ı ´ a C. Palumbo; Inés S. Moreno; Isabel Ch. Bernardo; Domingo A. Tarzia
Source:
Soil Science Society of America journal 2000 v.64 no.4 pp. 1363-1367
ISSN:
0361-5995
Subject:
Hapludults; Zea mays; corn; crops; equations; growth chambers; hybrids; magnesium; models; nutrient uptake; phosphorus; potassium; prediction; root growth; root systems; roots; seedlings; sulfur; wheat; Argentina
Abstract:
... Single nutrient uptake by a growing root system is often estimated by the Barber-Cushman model. The model solves the coupled equations of transport in the soil and absorption of nutrient by roots in fixed domains. This study was conducted to determine whether a moving boundary model that accounts for increasing root competition could improve predictions of nutrient uptake. Our model includes assum ...
DOI:
10.2136/sssaj2000.6441363x

8. Polyacrylamide, Sediments, and Interrupted Flow Effects on Rill Erosion and Intake Rate

Author:
D. Sirjacobs; I. Shainberg; I. Rapp; G. J. Levy
Source:
Soil Science Society of America journal 2000 v.64 no.4 pp. 1487-1495
ISSN:
0361-5995
Subject:
Haploxeralfs; Vertisols; irrigation; irrigation water; polyacrylamide; rill erosion; sediments; tap water; water quality
Abstract:
... The reduction in the intake rate (IR) during interrupted irrigation is difficult to predict. Sediments in irrigation water decrease the effect of interrupted irrigation on IR. Polyacrylamide (PAM) reduces rill erosion, but its effect on IR is controversial. The effects of water quality (tap water, tap water containing sediments, and 10 g m⁻³ PAM solution) and interrupted flow on IR and rill erosio ...
DOI:
10.2136/sssaj2000.6441487x

9. Predicting Boron Adsorption by Soils Using Soil Chemical Parameters in the Constant Capacitance Model

Author:
Sabine Goldberg; Scott M. Lesch; Donald L. Suarez
Source:
Soil Science Society of America journal 2000 v.64 no.4 pp. 1356-1363
ISSN:
0361-5995
Subject:
boron; capacitance; cation exchange capacity; equations; inorganic carbon; models; organic carbon; prediction; regression analysis; soil solution; surface area
Abstract:
... The constant capacitance model, a chemical surface complexation model, was applied to B adsorption on 17 soils selected for variation in soil properties. A general regression model was developed for predicting soil B surface complexation constants from easily measured soil chemical characteristics. These chemical properties were cation-exchange capacity (CEC), surface area, organic carbon content ...
DOI:
10.2136/sssaj2000.6441356x

10. Simulating Scale-Dependent Solute Transport in Soils with the Fractional Advective–Dispersive Equation

Author:
Yakov Pachepsky; David Benson; Walter Rawls
Source:
Soil Science Society of America journal 2000 v.64 no.4 pp. 1234-1243
ISSN:
0361-5995
Subject:
chlorides; clay soils; dispersibility; equations; sand; soil aggregates; soil depth; soil heterogeneity; solutes
Abstract:
... Solute dispersivity defined from the classical advective–dispersive equation (ADE) was found to increase as the length of a soil column or the soil depth increased. The heterogeneity of soil is a physical reason for this scale dependence. Such transport can be described assuming that the random movement of solute particles belongs to the family of so-called Lévy motions. Recently a differential so ...
DOI:
10.2136/sssaj2000.6441234x

11. Soil Carbon and Nitrogen Dynamics Following Application of Pig Slurry for the 19th Consecutive Year I. Carbon Dioxide Fluxes and Microbial Biomass Carbon

Author:
Philippe Rochette; Denis A. Angers; Denis C o ˆ té
Source:
Soil Science Society of America journal 2000 v.64 no.4 pp. 1389-1395
ISSN:
0361-5995
Subject:
Sus scrofa; agricultural soils; application rate; carbon dioxide; greenhouse gas emissions; microbial biomass; microbial carbon; mineral fertilizers; nitrogen; phosphorus pentoxide; pig manure; slurries; soil carbon; soil microorganisms; soil respiration; soil temperature; soil water; swine
Abstract:
... Agricultural soils often receive annual applications of manure for long periods. The objective of this study was to quantify the effects of 19 consecutive years of pig (Sus scrofa) slurry (PS) application on CO₂ emissions and soil microbial biomass. Soil temperature, soil moisture, and extractable soil C were also determined to explain the variations in CO₂ emissions and soil microbial biomass. Lo ...
DOI:
10.2136/sssaj2000.6441389x

12. Soil Carbon and Nitrogen Dynamics Following Application of Pig Slurry for the 19th Consecutive Year II. Nitrous Oxide Fluxes and Mineral Nitrogen

Author:
Philippe Rochette; Eric van Bochove; Danielle Prévost; Denis A. Angers; Denis C o ˆ té; Normand Bertrand
Source:
Soil Science Society of America journal 2000 v.64 no.4 pp. 1396-1403
ISSN:
0361-5995
Subject:
Sus scrofa; Zea mays; agricultural soils; corn; denitrification; emissions factor; enzyme activity; greenhouse gas emissions; loam soils; mineral fertilizers; nitrate nitrogen; nitrogen; nitrous oxide; phosphorus pentoxide; pig manure; residual effects; silage; slurries; soil carbon; swine; total nitrogen
Abstract:
... Agricultural soils often receive annual applications of manure for long periods. Our objective was to quantify the effects of 19 consecutive years of pig (Sus scrofa) slurry (PS) application to a loamy soil (loamy, mixed, frigid Aeric Haplaquept) on N₂O emissions. Soil surface N₂O fluxes (F N₂O) were measured 36 times in 1 yr. Nitrous oxide concentration profiles, soil NH⁺ ₄- and NO⁻ ₃-N contents, ...
DOI:
10.2136/sssaj2000.6441396x

13. Soil Community Analysis Using DGGE of 16S rDNA Polymerase Chain Reaction Products

Author:
Cindy H. Nakatsu; Vigdis Torsvik; Lise Øvreås
Source:
Soil Science Society of America journal 2000 v.64 no.4 pp. 1382-1388
ISSN:
0361-5995
Subject:
Archaea; agricultural soils; agroecosystems; bacteria; community structure; crop rotation; denaturing gradient gel electrophoresis; microbial communities; polluted soils; polycyclic aromatic hydrocarbons; polymerase chain reaction; ribosomal DNA; ribosomal RNA; soil ecology; soil sampling; tillage; Norway; United States
Abstract:
... Separation of polymerase chain reaction (PCR)–amplified 16S rDNA products using denaturing gradient gel electrophoresis (DGGE) was tested as a means to study microbial community composition in bulk soil samples. DNA was extracted from six soils from agroecosystems in Norway and the USA under different agronomic treatments (crop, rotation, and tillage); one soil is contaminated with polyaromatic hy ...
DOI:
10.2136/sssaj2000.6441382x

14. Soil Microclimate and Chemistry of Spruce–Fir Tree Islands in Northern Utah

Author:
Helga Van Miegroet; Molly T. Hysell; Amber Denton Johnson
Source:
Soil Science Society of America journal 2000 v.64 no.4 pp. 1515-1525
ISSN:
0361-5995
Subject:
Abies lasiocarpa; Picea engelmannii; altitude; canopy; carbon nitrogen ratio; islands; meadow soils; meadows; microclimate; organic horizons; shade; snow; snowmelt; soil chemical properties; soil temperature; soil water; summer; trees; Utah
Abstract:
... The objective was to investigate differences in soil properties in high-elevation tree islands composed of subalpine fir [Abies lasiocarpa (Hook.) Nutt.] and Engelmann spruce [Picea engelmannii Parry ex Engelm.] relative to semiarid meadows in Northern Utah. We compared snow depths, surface soil temperature and moisture, and soil chemical properties (0–30 cm) between tree islands and the surroundi ...
DOI:
10.2136/sssaj2000.6441515x

15. Soil Thermal Conductivity Effects of Density, Moisture, Salt Concentration, and Organic Matter

Author:
Nidal H. Abu-Hamdeh; Randall C. Reeder
Source:
Soil Science Society of America journal 2000 v.64 no.4 pp. 1285-1290
ISSN:
0361-5995
Subject:
Sphagnum; bulk density; calcium chloride; clay loam soils; growth and development; laboratory experimentation; microclimate; salt concentration; sand; sandy loam soils; soil density; soil organic matter; thermal conductivity; water content
Abstract:
... The thermal conductivity of soil under a given set of conditions is most important as it relates to a soil's microclimate. The early growth and development of a crop may be determined to a large extent by microclimate. The effect of bulk density, moisture content, salt concentration, and organic matter on the thermal conductivity of some sieved and repacked Jordanian soils was investigated through ...
DOI:
10.2136/sssaj2000.6441285x

16. Soils and Landscapes of Kärkevagge, Swedish Lapland

Author:
Robert G. Darmody; Colin E. Thorn; John C. Dixon; Peter Schlyter
Source:
Soil Science Society of America journal 2000 v.64 no.4 pp. 1455-1466
ISSN:
0361-5995
Subject:
Cryofluvents; Cryorthents; Cryosaprists; Dystrocryepts; Gelisols; Haplocryods; Mollisols; altitude; bedrock; clay; climate; cold; cold soils; floodplains; interstratified minerals; landscape position; landscapes; mica; mineral soils; permafrost; soil formation; soil pH; soil taxonomy; soil temperature; treeline; watersheds; weathering; Arctic region; Lapland; Sweden
Abstract:
... Kärkevagge, a glacially eroded valley above the Arctic Circle in Sweden, is of particular interest because research findings there in the 1950s challenged the view that chemical weathering is insignificant in cold climates. Because of the wide elevation range, diverse landscapes, steep slopes, and proximity to tree line, soils in the watershed are quite variable and recent changes to Soil Taxonomy ...
DOI:
10.2136/sssaj2000.6441455x

17. Soil–Landform Relationships on a Loess-Mantled Upland Landscape in Missouri

Author:
F. J. Young; R. D. Hammer
Source:
Soil Science Society of America journal 2000 v.64 no.4 pp. 1443-1454
ISSN:
0361-5995
Subject:
base saturation; clay; color; glacial till; highlands; hydrology; land use; landscape position; landscapes; organic matter; pH; silt; soil surveys; Missouri
Abstract:
... Soil survey users are requesting statistically valid distributions of soil attributes that are important for management and land use. The hypothesis that many soil attributes vary predictably with landscape positions was tested with 257 pedons from point transects in a 40-ha upland Missouri setting. The effect of landscape position on the central tendencies of selected soil properties was examined ...
DOI:
10.2136/sssaj2000.6441443x

18. Stratigraphy and Hydrology of the Jackson-Frazier Wetland, Oregon

Author:
David V. D'Amore; Scott R. Stewart; J. Herbert Huddleston; J. Reed Glasmann
Source:
Soil Science Society of America journal 2000 v.64 no.4 pp. 1535-1543
ISSN:
0361-5995
Subject:
Holocene epoch; X-ray diffraction; alluvium; clay; geomorphology; groundwater; isotopes; landscapes; piezometers; silt; soil water; stratigraphy; surface water; water table; wetland soils; wetlands; Oregon
Abstract:
... The relationship between wetland soils and hydrology can be better understood by linking soil geomorphological features to the measurement of groundwater depths in the soil. Soil stratigraphic analysis and long-term measurements of soil water levels in piezometers were used at the Jackson-Frazier wetland in western Oregon to investigate the interaction between local geomorphological history and th ...
DOI:
10.2136/sssaj2000.6441535x

19. Transient Flow from Tension Infiltrometers I. The Two-Parameter Equation

Author:
Jean-Pierre Vandervaere; Michel Vauclin; Dave E. Elrick
Source:
Soil Science Society of America journal 2000 v.64 no.4 pp. 1263-1272
ISSN:
0361-5995
Subject:
equations; infiltrometers; laboratory experimentation; permeability; soil; transient flow; water content
Abstract:
... Tension disk infiltrometer experiments are generally conducted until apparent steady state is reached because most of the methods of analysis are based on Wooding's solution for steady state flux. However, the time necessary to reach steady state may be a penalizing aspect for soils with low permeability and the information contained in the transient stages is not utilized. Moreover, these methods ...
DOI:
10.2136/sssaj2000.6441263x

20. Transient Flow from Tension Infiltrometers II. Four Methods to Determine Sorptivity and Conductivity

Author:
Jean-Pierre Vandervaere; Michel Vauclin; Dave E. Elrick
Source:
Soil Science Society of America journal 2000 v.64 no.4 pp. 1272-1284
ISSN:
0361-5995
Subject:
clay; equations; gravity; guidelines; hydraulic conductivity; infiltrometers; methodology; models; sand; transient flow
Abstract:
... In Vandervaere et al. (2000) it was shown that the transient regime of axisymmetric infiltration can be described by a two-term equation with one term proportional to the square root of time and the other term proportional to time. The two corresponding coefficients, C ₁ and C ₂, are functions of the hydraulic conductivity, K, and the sorptivity, S In this paper we propose four different methods t ...
DOI:
10.2136/sssaj2000.6441272x