scholarly journals Optimizing Cover Crop Benefits with Diverse Mixtures and an Alternative Termination Method

2012 ◽  
Vol 104 (5) ◽  
pp. 1425-1435 ◽  
Author(s):  
Sam E. Wortman ◽  
Charles A. Francis ◽  
Mark L. Bernards ◽  
Rhae A. Drijber ◽  
John L. Lindquist
Keyword(s):  
Author(s):  
М. I. Dzhalalova ◽  
P. А. Abdurashidova ◽  
R. М. Zagidova

The coastal strip of the northwestern Caspian is characterized by hydromorphism and salinization processes which depending on the Caspian piled-up water, groundwater salinity, seawater, and salt composition of the underlying rocks. The migrational salts capability in deltoic ecosystem components in dynamic over the main representatives of pasture plants occurring in the Western Caspian and playing an important role in developing the theoretical foundations of a system of measures to increase the productivity of cover crop have studied. Salts migration from soil layers into plants which taking place in synthesis of material-energy and material resource of environment is one of the chains of bio-substrat links. The research results confirm the data that the ash elements stock in the ephemeral-absinthial group varies from 21.5 to 64.5 kg per 1 ha. The organogens prevail in them – 944 kg / ha, K is dominant, then Ca and Mg. The amount of halogens is 7.05 kg / ha, of which Cl portion includes 3.31 and Na – 2.80 kg / ha. In the ephemeral-absinthial group cenoses rather high values of aboveground phytomass are up to 50 centners / ha and the supply of ash elements (halogens 32.14 and organogens 36.18 mg-eq) is much higher compared to their content in soil (7.05 and 6, 31 mg-eq). In roots difference in quantity of organogens and halogens is insignificant – 2.03 and 2.04 mg-eq. We associate such differences with a greater proportion of absinthial in the aboveground phytomass composition


Author(s):  
Mark Licht ◽  
Liz Juchems ◽  
Jacqueline Comito ◽  
Matthew Helmers ◽  
Sarah Carlson
Keyword(s):  

Author(s):  
John E. Sawyer ◽  
Jose L. Pantoja ◽  
Daniel W. Barker

Author(s):  
John E. Sawyer ◽  
Jose L. Pantoja ◽  
Daniel W. Barker

Author(s):  
Mark Licht ◽  
Liz Juchems ◽  
Jacqueline Comito ◽  
Matthew Helmers ◽  
Sarah Carlson
Keyword(s):  

Author(s):  
John E. Sawyer ◽  
Jose L. Pantoja ◽  
Daniel W. Barker

2020 ◽  
Author(s):  
Mujen Wang ◽  
◽  
William L. Perry ◽  
Wondwosen Mekonnen Seyoum

Author(s):  
Khandakar R. Islam ◽  
Greg Roth ◽  
Mohammad A. Rahman ◽  
Nataliia O. Didenko ◽  
Randall C. Reeder
Keyword(s):  
Flue Gas ◽  

Agriculture ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 474
Author(s):  
Darija Lemic ◽  
Ivana Pajač Živković ◽  
Marija Posarić ◽  
Renata Bažok

The aim of this study was to determine the effects of different pre-sowing operations on the abundance and composition of total soil fauna in soybean cultivation, with special attention to carabids as biological indicators of agroecosystem quality. The study was conducted in central Croatia with six different pre-sowing activities (cover crop, mulching, ploughing, glyphosate, fertiliser removal, conventional tillage). Pitfall traps were used to collect soil fauna in April, June and September. After determining the abundance and composition of the fauna, their coenological characteristics were calculated and statistical analysis was performed. During the study, 7836 individuals of soil fauna were collected. The composition consisted of 84% beneficial, 8% harmful and 8% indifferent fauna. Class Insecta was the most numerous with a proportion of 56%, with most members of the family Carabidae (1622 individuals), followed by the class Arachnida (40%). The number of fauna collected was influenced by the interaction between pre-seeding intervention and sampling date. Pre-seeding interventions that did not involve soil activities did not affect the number and composition of soil fauna at the beginning of vegetation. Mechanical interventions in the soil and warmer and drier weather have a negative effect on the number and composition of soil fauna. As the season progresses, the influence of pre-sowing activities on soil fauna in soybean crops decreases. It seems that a reduction in mechanical activities in the shallow seed layer of the soil has a positive effect on species richness or diversity. Of particular note is the large proportion of beneficial insects that currently colonise the study area, characterising soil richness and stable natural equilibrium.


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