scholarly journals Timing of atrazine application for control of quackgrass (Agropyron repens)

2005 ◽  
Vol 74 (2) ◽  
pp. 89-99
Author(s):  
J.D. Gaynor ◽  
A.S. Hamill
Keyword(s):  
Bare Soil ◽  
Term Effect ◽  
Corn Yield ◽  
Split Application ◽  
Single Application ◽  
Significant Extent ◽  
Long Term Effect ◽  
Atrazine Treatment ◽  
Agropyron Repens

The use of foliar or soil applied atrazine to control quackgrass (Agropyron repens) in corn (Zea mays) was investigated. Atrazine treatments to control quackgrass significantly increased corn yield. Spring tillage without atrazine had little or no long term effect on quackgrass stand. A single application of 4.5 kg a.i. atrazine ha-1 applied in the fall or spring provided no better control of quackgrass than a split application of 2.25 kg a.i. atrazine ha-1 in either the foliage or bare soil experiments. Quackgrass recovery and soybean (Glycine max) yield were measured for 2 yr afterthe last atrazine application. Quackgrass did not recover to any significant extent within 2 yr after the cessation of the treatments on any of the atrazine treated plots. Atrazine residues from the previous fall applications significantly reduced soybean yield. Two years after the last atrazine treatment, soybean yields were similar, regardiess of former spring or fall atrazine application.

Long-term Effect of a Single Application of Organic Refuse on Carbon Sequestration and Soil Physical Properties

2008 ◽  
Vol 37 (6) ◽  
pp. 2093-2099 ◽  
Author(s):  
J. Albaladejo ◽  
J. Lopez ◽  
C. Boix-Fayos ◽  
G.G. Barbera ◽  
M. Martinez-Mena
Keyword(s):  
Carbon Sequestration ◽  
Physical Properties ◽  
Soil Physical Properties ◽  
Term Effect ◽  
Single Application ◽  
Long Term Effect

scholarly journals Long-Term Effect of Tillage Practices and Nitrogen Fertilization on Corn Yield

2020 ◽  
Vol 6 (9) ◽  
Author(s):  
Carlos A. Bonini Pires ◽  
Marcos M. Sarto ◽  
James S. Lin ◽  
William G. Davis ◽  
Charles Rice
Keyword(s):  
Nitrogen Fertilization ◽  
Term Effect ◽  
Corn Yield ◽  
Tillage Practices ◽  
Long Term Effect

Long-term effects of incorporated lime and topdressed lime on the pH in the surface and subsurface of pasture soils

1987 ◽  
Vol 27 (4) ◽  
pp. 533 ◽  
Author(s):  
SM Bromfield ◽  
RW Cumming ◽  
DJ David ◽  
CH Williams
Keyword(s):  
Soil Ph ◽  
New South ◽  
Term Effect ◽  
Soil Profiles ◽  
Single Application ◽  
Long Term Effects ◽  
South Wales ◽  
Long Term Effect ◽  
Basaltic Soils

Soil profiles from limed and unlimed commercial pastures and from lime trials on pastures in the Crookwell district of the Southern Tablelands of New South Wales were sampled and pH measured at 2- or 5-cm intervals to depths ranging from 10 to 60 cm. A single application of lime (3.6-5.6 t/ha depending on the soil) incorporated into the surface 10 cm had a long-term effect and maintained pH above 5.5 in the top 30 cm for at least 12 years. Lime applied as a topdressing to soils on granite raised the pH by at least 0.2 pH units to a depth of 15 cm after 6 years. The depth affected was less on the heavier-textured basaltic soils and on the initially more acid sedimentary soils. There appears to be a role for top-dressing with lime to prevent subsurface acidity from developing under pastures and to correct it in the upper layers of light textured soils. The pH profiles from a given treatment were variable and highlighted the problem of obtaining a field measurement for soil pH that is representative of the plant's environment.

A long-term effect of subliminally presented words

2010 ◽  
Author(s):  
Andreas T. Breuer ◽  
Michael E. J. Masson ◽  
Glen E. Bodner
Keyword(s):  
Term Effect ◽  
Long Term Effect
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