Open Access. Powered by Scholars. Published by Universities.®
- Keyword
-
- Tillage (2)
- Carbon sequestration (1)
- Cover crops (1)
- Crop biomass carbon (1)
- Crop rotation (1)
-
- Cropping sequence (1)
- Cultural practice (1)
- Dryland cropping system (1)
- Fertilizer (1)
- Foxtail millet (1)
- Grazing (1)
- Herbicide (1)
- Integrated crop management (1)
- Microbial activity (1)
- Microbial biomass (1)
- Nitrate-N (1)
- Nitrogen storage (1)
- Plant biomass (1)
- Proso millet (1)
- Semiarid (1)
- Soil organic carbon (1)
- Soil sampling (1)
- Soil structure (1)
- Soil water (1)
- Sorghum–sudangrass (1)
- Surface residue (1)
- Weed control (1)
- Weed seed production (1)
Articles 1 - 8 of 8
Full-Text Articles in Entire DC Network
Annual Warm-Season Grasses Vary For Forage Yield, Quality, And Competitiveness With Weeds, Andrew W. Lenssen, S. Dennis Cash
Annual Warm-Season Grasses Vary For Forage Yield, Quality, And Competitiveness With Weeds, Andrew W. Lenssen, S. Dennis Cash
Andrew W. Lenssen
Warm-season annual grasses may be suitable as forage crops in integrated weed management systems with reduced herbicide use. A 2-year field study was conducted to determine whether tillage system and nitrogen (N) fertilizer application method influenced crop and weed biomass, water use, water use efficiency (WUE), and forage quality of three warm-season grasses, and seed production by associated weeds. Tillage systems were zero tillage and conventional tillage with a field cultivator. The N fertilization methods were urea broadcast or banded near seed rows at planting. Warm-season grasses seeded were foxtail (Setaria italica L.) and proso (Panicum mileaceum L.) millets, and …
Sheep Grazing In A Wheat–Fallow System Affects Dryland Soil Properties And Grain Yield, Upendra M. Sainju, Andrew W. Lenssen, Hayes B. Goosey, Erin Snyder, Patrick G. Hatfield
Sheep Grazing In A Wheat–Fallow System Affects Dryland Soil Properties And Grain Yield, Upendra M. Sainju, Andrew W. Lenssen, Hayes B. Goosey, Erin Snyder, Patrick G. Hatfield
Andrew W. Lenssen
Sheep (Ovis aries L.) grazing, an effective method of controlling weeds and pests in a wheat (Triticum aestivum L.)–fallow system, may affect dryland soil properties and wheat yield. We evaluated the effects of fallow management for weed control and soil water conservation (sheep grazing, herbicide application [chemical], and tillage [mechanical]) and cropping sequence (continuous spring wheat [CSW], spring wheat–fallow [SW-F], and winter wheat–fallow [WW-F]) on soil nutrients and chemical properties in the 0- to 60-cm depth and wheat yield. The experiment was conducted in a Blackmore silt loam from 2004 to 2008 in southwestern Montana. Soil P and K concentrations …
Dryland Soil Carbon Dynamics Under Alfalfa And Durum-Forage Cropping Sequences, Upendra M. Sainju, Andrew W. Lenssen
Dryland Soil Carbon Dynamics Under Alfalfa And Durum-Forage Cropping Sequences, Upendra M. Sainju, Andrew W. Lenssen
Andrew W. Lenssen
Forages grown in rotation with or without cereals to sustain dryland soil water content and crop production may influence C dynamics. We evaluated the effect of alfalfa (Medicago sativa L.) and durum (Triticum turgidum L.)-annual forage cropping sequences on above- (stems + leaves) and belowground (roots) biomass C inputs and dryland soil organic C (SOC), particulate total C (PTC), microbial biomass C (MBC), and potential C mineralization (PCM) at the 0–120 cm depth. Cropping sequences were continuous alfalfa (CA), durum-barley (Hordeum vulgare L.) hay (D-B), durum-foxtail millet (Setaria italica L.) hay (D-M), durum-Austrian winter pea (Pisum sativum L.)/barley mixture hay …
Soil Nitrogen Dynamics Under Dryland Alfalfa And Durum–Forage Cropping Sequences, Upendra M. Sainju, Andrew W. Lenssen
Soil Nitrogen Dynamics Under Dryland Alfalfa And Durum–Forage Cropping Sequences, Upendra M. Sainju, Andrew W. Lenssen
Andrew W. Lenssen
Forages grown in rotation with or without cereals to sustain dryland soil water content and crop production may influence N dynamics. We evaluated the effect of alfalfa (Medicago sativa L.) and durum (Triticum turgidum L.)–annual forage cropping sequences on above- (stems + leaves) and belowground (roots) biomass N, dryland soil total N (STN), particulate organic N (PON), microbial biomass N (MBN), potential N mineralization (PNM), NH4–N, and NO3–N contents at the 0- to 120-cm depth in northeastern Montana from 2002 to 2005. Cropping sequences were continuous alfalfa (CA), durum–barley (Hordeum vulgare L.) hay (D-B), durum–foxtail millet (Setaria italica L.) hay …
Tillage Effects On Dryland Soil Physical Properties In Northeastern Montana, J. D. Jabro, Upendra M. Sainju, Andrew W. Lenssen, R. G. Evans
Tillage Effects On Dryland Soil Physical Properties In Northeastern Montana, J. D. Jabro, Upendra M. Sainju, Andrew W. Lenssen, R. G. Evans
Andrew W. Lenssen
We evaluated the effect of no tillage (NT) and conventional tillage (CT) on soil penetration resistance (PR), bulk density (BD), gravimetric moisture content (MC), and saturated hydraulic conductivity (Ks) during the fallow phase of a spring wheat–fallow rotation. The study was conducted on two soils mapped as Williams loam at the Froid and Sidney sites. Soil measurements were made on 19 May, 23 June, and 4 August 2005 at the Froid site and on 6 June and 8 July 2005 at the Sidney site. Tillage had no effect on either soil properties except on the PR at Sidney. However, soil …
Dryland Residue And Soil Organic Matter As Influenced By Tillage, Crop Rotation, And Cultural Practice, Andrew W. Lenssen, Upendra M. Sainju, Thecan Caesar-Tonthat, Jalal D. Jabro, Robert T. Lartey, Robert G. Evans, Brett L. Allen
Dryland Residue And Soil Organic Matter As Influenced By Tillage, Crop Rotation, And Cultural Practice, Andrew W. Lenssen, Upendra M. Sainju, Thecan Caesar-Tonthat, Jalal D. Jabro, Robert T. Lartey, Robert G. Evans, Brett L. Allen
Andrew W. Lenssen
Novel management practices are needed to increase dryland soil organic matter and crop yields that have been declining due to long-term conventional tillage with spring wheat (Triticum aestivum L.)-fallow system in the northern Great Plains, USA. The effects of tillage, crop rotation, and cultural practice were evaluated on dryland crop biomass (stems + leaves) yield, surface residue, and soil organic C (SOC) and total N (STN) at the 0–20 cm depth in a Williams loam (fine-loamy, mixed, superactive, frigid, Typic Argiustolls) from 2004 to 2007 in eastern Montana, USA. Treatments were two tillage practices [no-tillage (NT) and conventional tillage (CT)], …
Measured And Predicted Temporal Changes In Soil Nitrate-N Levels From Late Summer To Early Spring In Montana, Andrew W. Lenssen, Clain Jones, Chengci Chen, Kent Mcvay, Bob Stougaard, Mal Westcott, Joyce Eckhoff, Jennifer Weeding, Mark Greenwood
Measured And Predicted Temporal Changes In Soil Nitrate-N Levels From Late Summer To Early Spring In Montana, Andrew W. Lenssen, Clain Jones, Chengci Chen, Kent Mcvay, Bob Stougaard, Mal Westcott, Joyce Eckhoff, Jennifer Weeding, Mark Greenwood
Andrew W. Lenssen
Most soil sampling is conducted from August to November in Montana because of better soil sampling conditions and because it provides more time for growers to make fertilizer decisions prior to application. Fertilizer guidelines in Montana are based on spring nitrate-N levels in the upper 2 ft because they are more indicative of growing season available N than fall nitrate-N levels. It is not known how much nitrate-N levels change between late summer and spring, nor is it known what factors affect these changes, and large changes could result in either over-application of N fertilizer or sub-optimal yields. A three-year …
Sheep Grazing Effect On Dryland Soil Carbon And Nitrogen In The Wheat-Fallow System, Andrew W. Lenssen, Upendra M. Sainju, Hayes B. Goosey, Erin Snyder, Patrick G. Hatfield
Sheep Grazing Effect On Dryland Soil Carbon And Nitrogen In The Wheat-Fallow System, Andrew W. Lenssen, Upendra M. Sainju, Hayes B. Goosey, Erin Snyder, Patrick G. Hatfield
Andrew W. Lenssen
Weed control by sheep grazing during fallow periods in the dryland wheat-fallow system may influence soil C and N levels. The effects of fallow management for weed control and soil water conservation [sheep grazing (grazing), herbicide application (chemical), and tillage (mechanical)] and cropping sequence [continuous spring wheat (CSW), spring wheat-fallow (SW-F), and winter wheatfallow (WW-F)] on wheat biomass (stems + leaves) yield and soil organic C (SOC) and total N (STN) at the 0-120 cm depth was evaluated from 2004 to 2008 in western Montana. Annualized wheat biomass yield was greater in CSW than in SW-F and WW-F from 2004 …