Surface Residue and In‐Row Treatment Effects on Long‐Term No‐Tillage Continuous Corn

1994 ◽  
Vol 86 (4) ◽  
pp. 711-718 ◽  
Author(s):  
James B. Swan ◽  
Roger L. Higgs ◽  
Theodore B. Bailey ◽  
Nyle C. Wollenhaupt ◽  
William H. Paulson ◽  
...  
Keyword(s):  
Treatment Effects ◽  
No Tillage ◽  
Surface Residue ◽  
Continuous Corn

Seedbank and Emerged Weed Communities Following Adoption of Glyphosate-Resistant Crops in a Long-Term Tillage and Rotation Study

Weed Science ◽  
2009 ◽  
Vol 57 (3) ◽  
pp. 261-270 ◽  
Author(s):  
Lynn M. Sosnoskie ◽  
Catherine P. Herms ◽  
John Cardina ◽  
Theodore M. Webster
Keyword(s):  
Community Composition ◽  
Indicator Species ◽  
Conventional Tillage ◽  
Management Program ◽  
No Tillage ◽  
Weed Species ◽  
Continuous Corn ◽  
Weed Communities ◽  
Rotation Study

The compositions of the germinable weed seedbank and aboveground weed communities in a long-term tillage and rotation study were characterized 4, 5, and 6 yr (2002 to 2004) after the adoption of glyphosate-tolerant corn and soybean. Averaged across rotation, mean germinable weed seed density and diversity were greatest in the no-tillage treatment as compared to the minimum- and conventional-tillage treatments. Averaged over tillage, density and diversity were greater in the corn–oat–hay (ryegrass + alfalfa) system as compared to the continuous corn and corn–soybean rotations. Similar trends in density and diversity were observed for the aboveground weed communities. Differences in community composition among treatments were quantified with the use of a multiresponse permutation procedure. Results indicated that the weed seedbank community in a corn–oat–hay rotational system differed from the communities associated with the continuous corn and corn–soybean rotational systems. Weed seedbank communities developing under a no-tillage operation differed from those in minimum- and conventional-tillage scenarios. Compositional differences among the aboveground weed communities were less pronounced in response to tillage and rotation. Indicator species analyses indicated that the number of significant indicator weed species was generally higher for no tillage than minimum or conventional tillage for both the seedbank and the aboveground weed communities. The number of significant indicator species for the seedbank and weed communities was generally greater in the three-crop rotation as compared to the continuous corn and corn–soybean rotations. The trends observed in density, diversity, and community composition after the adoption of glyphosate-tolerant corn and soybeans, and a glyphosate-dominated weed management program, were also observed when soil-applied herbicides were included in the study. We suggest that the switch to a POST-glyphosate protocol did not significantly alter weed communities in the short term in this study.

Crop residue application at low rates could improve soil phosphorus cycling under long-term no-tillage management

2021 ◽  
Vol 57 (4) ◽  
pp. 499-511
Author(s):  
Guohui Wu ◽  
Kai Wei ◽  
Zhenhua Chen ◽  
Dongqi Jiang ◽  
Hongtu Xie ◽  
...  
Keyword(s):  
Crop Residue ◽  
Soil Phosphorus ◽  
Phosphorus Cycling ◽  
No Tillage

scholarly journals The importance of achieving long-term treatment effects in ADHD

2021 ◽  
Author(s):  
Pieter J. Hoekstra ◽  
Barbara J. van den Hoofdakker ◽  
Annabeth P. Groenman
Keyword(s):  
Treatment Effects ◽  
Term Treatment ◽  
Long Term Treatment

scholarly journals Effects of Management and Hillside Position on Soil Organic Carbon Stratification in Mediterranean Centenary Olive Grove

Agronomy ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 650
Author(s):  
Jesús Aguilera-Huertas ◽  
Beatriz Lozano-García ◽  
Manuel González-Rosado ◽  
Luis Parras-Alcántara
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Soil Quality ◽  
Management Practices ◽  
Soil Management ◽  
Olive Grove ◽  
No Tillage ◽  
Short Term ◽  
Degradation Degree

The short- and medium—long-term effects of management and hillside position on soil organic carbon (SOC) changes were studied in a centenary Mediterranean rainfed olive grove. One way to measure these changes is to analyze the soil quality, as it assesses soil degradation degree and attempts to identify management practices for sustainable soil use. In this context, the SOC stratification index (SR-COS) is one of the best indicators of soil quality to assess the degradation degree from SOC content without analyzing other soil properties. The SR-SOC was calculated in soil profiles (horizon-by-horizon) to identify the best soil management practices for sustainable use. The following time periods and soil management combinations were tested: (i) in the medium‒long-term (17 years) from conventional tillage (CT) to no-tillage (NT), (ii) in the short-term (2 years) from CT to no-tillage with cover crops (NT-CC), and (iii) the effect in the short-term (from CT to NT-CC) of different topographic positions along a hillside. The results indicate that the SR-SOC increased with depth for all management practices. The SR-SOC ranged from 1.21 to 1.73 in CT0, from 1.48 to 3.01 in CT1, from 1.15 to 2.48 in CT2, from 1.22 to 2.39 in NT-CC and from 0.98 to 4.16 in NT; therefore, the soil quality from the SR-SOC index was not directly linked to the increase or loss of SOC along the soil profile. This demonstrates the time-variability of SR-SOC and that NT improves soil quality in the long-term.

Long-term effects of no tillage and Ca-amendment on the activity of soil proteases and β-glucosidase in a Mediterranean agricultural field

2019 ◽  
Vol 95 ◽  
pp. 103135 ◽  
Author(s):  
Eduardo Vazquez ◽  
Marta Benito ◽  
Alberto Masaguer ◽  
Rafael Espejo ◽  
Eugenio Díaz-Pinés ◽  
...  
Keyword(s):  
No Tillage ◽  
Agricultural Field ◽  
Long Term Effects

scholarly journals Long-term treatment effects in chronic myeloid leukemia

2017 ◽  
Vol 75 (3) ◽  
pp. 733-758 ◽  
Author(s):  
Apollos Besse ◽  
Thomas Lepoutre ◽  
Samuel Bernard
Keyword(s):  
Chronic Myeloid Leukemia ◽  
Myeloid Leukemia ◽  
Treatment Effects ◽  
Term Treatment ◽  
Long Term Treatment

Long-term N inputs shape microbial communities more strongly than current-year inputs in soils under 10-year continuous corn cropping

2021 ◽  
pp. 108361
Author(s):  
Micaela Tosi ◽  
William Deen ◽  
Rhae Drijber ◽  
Morgan McPherson ◽  
Ashley Stengel ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Continuous Corn

The analysis of the results of a rotation experiment on the use of straw and fertilizers

1953 ◽  
Vol 43 (1) ◽  
pp. 77-88 ◽  
Author(s):  
H. D. Patterson
Keyword(s):  
Present Experiment ◽  
Treatment Effects ◽  
Standard Errors ◽  
Methods Of Analysis ◽  
Seasonal Factors ◽  
Long Term Experiments ◽  
The Mean ◽  
Linear Regressions

An experiment, designed to test different ways of using straw with fertilizers, and involving a three course rotation of crops, was carried out at Rothamsted between 1933 and 1951. The methods of analysis developed for this experiment are described in the present paper and demonstrated using yields of potatoes.Treatment effects of interest are given by the mean yields over all years and the linear regressions of yield on time. These estimates are straightforward but the evaluation of their errors is complicated by the existence of correlations due to the recurrence of treatments on the same plots. Further complications are introduced when, as frequently happens in long-term experiments, treatment effects show real variation from year to year. A method is given for estimating standard errors which include a contribution from this variation.The various relationships between yields and the uncontrolled seasonal factors can also be examined; in the present experiment there is some indication that the effects of treatments on yields of potatoes are influenced by the dates of planting.In other circumstances the analysis requires modifications, some of which are briefly considered.

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