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1. Furrow‐irrigation application efficiency in mid‐southern U.S. conservation tillage systems

Author:
M.A. Locke,   et al.   ; Bryant C.J.; L.J. Krutz; D.B. Reynolds; B.R. Golden; T. Irby; R.W. Steinriede Jr; G.D. Spencer;     Show all 8 Authors
Source:
Agronomy journal 2021 v.113 no.1 pp. 397-406
ISSN:
0002-1962
Subject:
Hapludalfs; adverse effects; agronomy; conventional tillage; cover crops; furrow irrigation; furrows; gravity; irrigation water; profitability; radishes; risk; rye; silt loam soils; soybeans; vegetation cover; water use efficiency
Abstract:
... Approximately 80% of mid‐southern U.S. irrigation requirements are supplied through gravity flow delivery systems with inherently low application efficiency. This research was conducted to determine whether the efficiency of furrow‐irrigation systems could be manipulated through conservation tillage systems. Three experiments were conducted near Stoneville, MS, on a Dubbs silt loam to determine th ...
Handle:
10113/7709404
DOI:
10.1002/agj2.20468

2. Modelling scenarios of soil properties and managements in olive groves at the micro-catchment scale with the AnnAGNPS model to quantify organic carbon

Author:
M.A. Locke,   et al.   ; E.V. Taguas; R.L. Bingner; H.G. Momm; R. Wells;     Show all 5 Authors
Source:
Catena 2021 v.203 pp. 105333
ISSN:
0341-8162
Subject:
catenas; clay; clay loam soils; conventional tillage; cover crops; desertification; half life; olives; risk; sandy loam soils; silt loam soils; soil organic carbon; soil texture; Spain
Abstract:
... Soil organic carbon (SOC) stock changes are crucial in identifying risk of desertification in fragile areas In this work, 108 scenarios were prepared with the model AnnAGNPS in a small catchment of extensive olive groves by considering 6 different soil types (with textures sandy, S; sandy loam, Slo; loam, L; clay loam, Clo; silty loam clay, SiLoC; clay, C), 3 different managements (no till, NT; co ...
DOI:
10.1016/j.catena.2021.105333

3. Conservation soybean production systems in the mid‐southern USA: II. Replacing subsoiling with cover crops

Author:
M.A. Locke,   et al.   ; Bryant C.J.; L.J. Krutz; D.B. Reynolds; B.R. Golden; T. Irby; R.W. Steinriede Jr; G.D. Spencer; B.E. Mills; C.W. Wood;     Show all 10 Authors
Source:
Crop, forage & turfgrass management 2020 v.6 no.1 pp. e20058
ISSN:
2374-3832
Subject:
Glycine max; Hapludalfs; Raphanus sativus; Secale cereale; conservation tillage; cost effectiveness; costs and returns; cover crops; farm profitability; grain yield; radishes; rye; silt loam soils; soybeans; subsoiling; sustainable agriculture; water use efficiency; Mississippi
Abstract:
... The adoption of cover crop production systems is lagging in the mid‐southern United States due to concerns over yield stability and on‐farm profitability. This research was conducted to determine if the inclusion of a cover crop in conservation tillage systems improves yield, profitability, and water use efficiency. The effects of replacing subsoiling with a cereal rye (Secale cereale L.) or tilla ...
Handle:
10113/7071285
DOI:
10.1002/cft2.20058

4. Conservation soybean production systems in the mid‐southern USA: I. Transitioning from conventional to conservation tillage

Author:
M.A. Locke,   et al.   ; Bryant C.J.; L.J. Krutz; D.B. Reynolds; B.R. Golden; T. Irby; R.W. Steinriede Jr; G.D. Spencer; B.E. Mills; C.W. Wood;     Show all 10 Authors
Source:
Crop, forage & turfgrass management 2020 v.6 no.1 pp. e20055
ISSN:
2374-3832
Subject:
Glycine max; conservation tillage; conventional tillage; costs and returns; grain yield; silt loam soils; soybeans; subsoiling; water use efficiency; Mississippi
Abstract:
... The adoption of production systems that leave greater than 30% residue coverage on the soil surface, that is, conservation tillage, is limited in the mid‐southern United States due to the development of a hardpan and subsequent yield reductions. This research was conducted to determine if the inclusion of subsoiling in conservation tillage systems can maintain yield and profitability relative to t ...
Handle:
10113/7071286
DOI:
10.1002/cft2.20055

5. Conservation production systems in the mid‐southern USA: III. Zone tillage for furrow‐irrigated soybean

Author:
M.A. Locke,   et al.   ; Bryant C.J.; L.J. Krutz; D.B. Reynolds; B.R. Golden; T. Irby; R.W. Steinriede Jr; G.D. Spencer; B.E. Mills; C.W. Wood;     Show all 10 Authors
Source:
Crop, forage & turfgrass management 2020 v.6 no.1 pp. e20057
ISSN:
2374-3832
Subject:
Glycine max; Raphanus sativus; costs and returns; cover crops; furrow irrigation; grain yield; no-tillage; profitability; radishes; silt loam soils; soybeans; subsoil; subsoiling; water use efficiency; Mississippi
Abstract:
... Mid‐southern U.S. soybean [Glycine max (L.) Merr.] producers are frequently encouraged to adopt no‐tillage systems to capture the associated environmental benefits; however, adoption is minimal due to the need for raised seedbeds for irrigation and drainage purposes. This research was conducted to determine if zone tillage systems, with and without a tillage radish (Raphanus sativus L. var. longip ...
Handle:
10113/7071284
DOI:
10.1002/cft2.20057

6. Using aquatic vegetation to remediate nitrate, ammonium, and soluble reactive phosphorus in simulated runoff

Author:
M.A. Locke,   et al.   ; M.T. Moore; R. Kröger;     Show all 3 Authors
Source:
Chemosphere 2016 v.160 pp. 149-154
ISSN:
0045-6535
Subject:
Echinodorus cordifolius; Myriophyllum aquaticum; Panicum hemitomon; Saururus cernuus; Typha latifolia; agricultural runoff; ammonium sulfate; aquatic ecosystems; interspecific variation; macrophytes; nitrogen; nutrient retention; phosphorus; phytoremediation; planting; potassium phosphates; scientists; sodium nitrate; summer; temporal variation; water quality; watersheds; Mississippi River; United States
Abstract:
... Within the agriculturally-intensive Mississippi River Basin of the United States, significant conservation efforts have focused on management practices that reduce nutrient runoff into receiving aquatic ecosystems. Only a small fraction of those efforts have focused on phytoremediation techniques. Each of six different aquatic macrophytes were planted, in monoculture, in three replicate mesocosms ...
Handle:
10113/5246410
DOI:
10.1016/j.chemosphere.2016.06.071

7. Effects of agricultural conservation practices on oxbow lake watersheds in the Mississippi River alluvial plain

Author:
M.A. Locke,   et al.   ; S.S. Knight; S. Smith;     Show all 3 Authors
Source:
Soil and Water Research v.8 no.3 pp. 113-123
ISSN:
1801-5395
Subject:
agricultural land; agricultural runoff; agricultural watersheds; alluvial plains; best management practices; conservation practices; conservation tillage; cover crops; farms; fish; groundwater; groundwater contamination; herbicide residues; herbicides; losses from soil; nitrate nitrogen; nonpoint source pollution; oxbow lakes; phosphorus; plankton; pollutants; pollution control; riparian areas; sediment transport; sediment yield; sediments; water quality; Mississippi River; United States
Abstract:
... Agricultural lands are considered to be a major source of nonpoint source pollutants such as sediment, pesticides and nutrients in the United States. Conservation practices have been tested for their effectiveness in reducing agricultural related pollutants on smaller scales, but farm watershed scale assessments of these practices are limited and few of these have evaluated the impacts on downstre ...
Handle:
10113/58906
DOI:
10.17221/45/2012-swr

8. Constructed wetlands as a component of the agricultural landscape: Mitigation of herbicides in simulated runoff from upland drainage areas

Author:
M.A. Locke,   et al.   ; M.A. Weaver; R.M. Zablotowicz; R.W. Steinriede; C.T. Bryson; R.F. Cullum;     Show all 6 Authors
Source:
Chemosphere 2011 v.83 no.11 pp. 1532-1538
ISSN:
0045-6535
Subject:
atrazine; constructed wetlands; drainage; fluometuron; highlands; lakes; landscapes; pollutants; risk reduction; runoff; sediments; soil degradation; soil microorganisms; traps; water quality; watersheds; Mississippi
Abstract:
... Constructed wetlands are a recommended practice for buffering pollutant source areas and receiving waters. A wetland consisting of a sediment trap and two treatment cells was constructed in a Mississippi Delta lake watershed. A 3-h simulated runoff event was initiated (2003) to evaluate fate and transport of atrazine and fluometuron through the wetland. Water samples were collected during a runoff ...
Handle:
10113/49766
DOI:
10.1016/j.chemosphere.2011.01.034
PubMed:
21329960

9. Differences in Microbial Biomass, Organic Carbon, and Dye Sorption between Flow and No-Flow Regions of Unsaturated Soil

Author:
M.A. Locke,   et al.   ; L.A. Gaston;     Show all 2 Author
Source:
Journal of environmental quality 2002 v.31 no.4 pp. 1406-1408
ISSN:
1537-2537
Subject:
Endoaqualfs; bromine; carbon; mass transfer; microbial biomass; models; silty clay soils; solutes; sorption; unsaturated flow
Abstract:
... Transport models in which the liquid phase is partitioned between conducting and nonconducting regions allow the possibility that degradation and sorption are different in these regions. However, there is little information on biological or chemical differences between conducting and nonconducting regions of the soil matrix. Previous work by the authors on Br⁻ transport through unsaturated, intact ...
DOI:
10.2134/jeq2002.1406

10. Spatial Variability of Soil Properties and Weed Populations in the Mississippi Delta

Author:
M.A. Locke,   et al.   ; L.A. Gaston; R.M. Zablotowicz; K.N. Reddy;     Show all 4 Authors
Source:
Soil Science Society of America journal 2001 v.65 no.2 pp. 449-459
ISSN:
0361-5995
Subject:
Gossypium hirsutum; Management Systems Evaluation Areas; air drying; application rate; clomazone; cotton; fluometuron; geostatistics; metolachlor; microbial activity; norflurazon; pH; pesticide application; plant density; planting; precision agriculture; preemergent weed control; river deltas; simulation models; soil organic carbon; soil properties; soil sampling; soil surveys; texture; weeds
Abstract:
... Simulation models and precision agriculture practices may require more detail and certainty about soil spatial variability than provided by soil surveys. This study described soil and weed spatial variability in 50-ha subareas of two sites included in the Mississippi Delta Management Systems Evaluation Areas project. Objectives were (i) to describe the spatial variability of soil properties and (i ...
DOI:
10.2136/sssaj2001.652449x