scholarly journals Methods of Intercropping Cover Crops with Maize in Southern Brazil

2019 ◽  
Vol 19 (1) ◽  
pp. 14-23
Author(s):  
Vanderson Vieira Batista ◽  
Rodrigo Antonio Hossa ◽  
Elisa Souza Lemes ◽  
Karine Fuschter Oligini ◽  
Carlos Andre Barhy ◽  
...  
Keyword(s):  
Cover Crops ◽  
Southern Brazil

Soil compressibility and least limiting water range of a constructed soil under cover crops after coal mining in Southern Brazil

2012 ◽  
Vol 124 ◽  
pp. 190-195 ◽  
Author(s):  
Cláudia Liane Rodrigues de Lima ◽  
Ezequiel Cesar Carvalho Miola ◽  
Luis Carlos Timm ◽  
Eloy Antonio Pauletto ◽  
Alvaro Pires da Silva
Keyword(s):  
Coal Mining ◽  
Cover Crops ◽  
Southern Brazil ◽  
Soil Compressibility ◽  
Least Limiting Water Range

Comparison of an integrated crop–livestock system with soybean only: Economic and production responses in southern Brazil

2013 ◽  
Vol 29 (3) ◽  
pp. 230-238 ◽  
Author(s):  
Carlos Alberto Oliveira de Oliveira ◽  
Carolina Bremm ◽  
Ibanor Anghinoni ◽  
Anibal de Moraes ◽  
Taise Robinson Kunrath ◽  
...  
Keyword(s):  
Cover Crops ◽  
Lolium Multiflorum ◽  
Average Daily Gain ◽  
Cropping System ◽  
Livestock Grazing ◽  
Total Production ◽  
Southern Brazil ◽  
Gross Margin ◽  
Sward Height ◽  
Daily Gain

AbstractIn Brazil, as well as globally, land use has been increasingly addressed for environmental impacts and economic improvements. Integrated crop–livestock systems (ICLSs) are a potential strategy to optimize use of land, increase total production and reduce economic risk through diversification. We compared production and economic outcomes of a soybean-only system with ICLS differing in sward management. The study area was managed since 2001 using no-till in southern Brazil. Soybean [Glycine max (L.) Merr.] was rotated with a mixture of black oat (Avena strigosa Schreb) and ryegrass (Lolium multiflorum Lam) either for: (i) grazing (ICLS) or (ii) cover crops as cropping system only (CS) with no livestock grazing. Four sward height management methods (10, 20, 30 or 40 cm) were evaluated under put-and-take stocking. Across years, soybean yield (2516±103 kg ha−1) was not affected by treatment, but was affected by year (P<0.001), due to rainfall during crop development. Cattle average daily gain, gain per hectare (GPH) and gross margin were affected by treatments (P<0.001). Average daily gain was lower when pasture was managed at 10 cm than between 20 and 40 cm. With increasing sward height, a gradual reduction in cattle GPH was observed (P<0.05). Overall gross margin was lower in CS than in ICLS. Economic return with ICLS was greatest when sward height management was between 10 and 20 cm. Our study indicates that ICLS could be considered an alternative management strategy that improves economic performance and promotes balanced production in the long term.

Potential of Carbon Accumulation in No-Till Soils with Intensive Use and Cover Crops in Southern Brazil

2006 ◽  
Vol 35 (4) ◽  
pp. 1599-1607 ◽  
Author(s):  
Telmo Jorge Carneiro Amado ◽  
Cimélio Bayer ◽  
Paulo Cesar Conceição ◽  
Evandro Spagnollo ◽  
Ben-Hur Costa de Campos ◽  
...  
Keyword(s):  
Cover Crops ◽  
Carbon Accumulation ◽  
Southern Brazil ◽  
No Till ◽  
Intensive Use

scholarly journals Soil carbon sequestration and stocks: short-term impact of maize succession to cover crops in Southern Brazil Inceptisol

2020 ◽  
Vol 18 (3) ◽  
pp. e0304
Author(s):  
Jorge L. Locatelli ◽  
Felipe Bratti ◽  
Ricardo H. Ribeiro ◽  
Marcos R. Besen ◽  
Eduardo Brancaleoni ◽  
...  
Keyword(s):  
Cover Crops ◽  
Red Clover ◽  
No Tillage ◽  
Annual Ryegrass ◽  
Southern Brazil ◽  
Short Term ◽  
C Stocks ◽  
Winter Cover ◽  
Winter Cover Crops ◽  
Soc Stocks

Aim of study: To evaluate soil organic carbon (SOC) sequestration and stock over the succession of maize to winter cover crops under a short-term no-tillage system.Area of study: A subtropical area in Southern Brazil.Material and methods: The experiment was implemented in 2013. The treatments were: seven winter cover crops single cultivated (white-oats, black-oats, annual-ryegrass, canola, vetch, fodder-radish and red-clover); an intercropping (black-oats + vetch); and a fallow, with maize in succession. Soil samples were collected after four years of experimentation, up to 0.60 m depth, for SOC determination.Main results: SOC stocks at 0-0.6 m depth ranged from 96.2 to 107.8 t/ha. The SOC stocks (0-0.60 m depth) were higher under vetch and black-oats, with an expressive increase of 23 and 20% for C stocks in the 0.45-0.60 m layer, compared to fallow. Thus, SOC sequestration rates (0-0.60 m depth), with vetch and black oats, were 1.68 and 0.93 t/ha·yr, respectively.Research highlights: The establishment of a high-quality and high C input cover crops in the winter, as vetch or black-oats in succession to maize, are able to increase SOC stocks, even in the short term. 

Validation of a screening instrument for postpartum depression in Southern Brazil

2009 ◽  
pp. 1-11
Author(s):  
Carlos Zubaran ◽  
Katia Foresti ◽  
Marina Verdi Schumacher ◽  
Aline Luz Amoretti ◽  
Lucia Cristina Muller ◽  
...  
Keyword(s):  
Postpartum Depression ◽  
Screening Instrument ◽  
Southern Brazil

New Technologies to Combat Herbicide Resistance

2020 ◽  
Vol 31 (2) ◽  
pp. 90-92
Author(s):  
Rob Edwards
Keyword(s):  
Winter Wheat ◽  
Herbicide Resistance ◽  
Cover Crops ◽  
New Technologies ◽  
Green Revolution ◽  
Arable Land ◽  
Limited Range ◽  
Cultural Control ◽  
Arable Farming ◽  
The Uk

Herbicide resistance in problem weeds is now a major threat to global food production, being particularly widespread in wild grasses affecting cereal crops. In the UK, black-grass (Alopecurus myosuroides) holds the title of number one agronomic problem in winter wheat, with the loss of production associated with herbicide resistance now estimated to cost the farming sector at least £0.5 billion p.a. Black-grass presents us with many of the characteristic traits of a problem weed; being highly competitive, genetically diverse and obligately out-crossing, with a growth habit that matches winter wheat. With the UK’s limited arable crop rotations and the reliance on the repeated use of a very limited range of selective herbicides we have been continuously performing a classic Darwinian selection for resistance traits in weeds that possess great genetic diversity and plasticity in their growth habits. The result has been inevitable; the steady rise of herbicide resistance across the UK, which now affects over 2.1 million hectares of some of our best arable land. Once the resistance genie is out of the bottle, it has proven difficult to prevent its establishment and spread. With the selective herbicide option being no longer effective, the options are to revert to cultural control; changing rotations and cover crops, manual rogueing of weeds, deep ploughing and chemical mulching with total herbicides such as glyphosate. While new precision weeding technologies are being developed, their cost and scalability in arable farming remains unproven. As an agricultural scientist who has spent a working lifetime researching selective weed control, we seem to be giving up on a technology that has been a foundation stone of the green revolution. For me it begs the question, are we really unable to use modern chemical and biological technology to counter resistance? I would argue the answer to that question is most patently no; solutions are around the corner if we choose to develop them.

Evaluation of Ryegrass Cover Crops in Rearing Ponds for Florida Largemouth Bass

1984 ◽  
Vol 46 (1) ◽  
pp. 55-57 ◽  
Author(s):  
C. W. Bowling ◽  
W. P. Rutledge ◽  
J. G. Geiger
Keyword(s):  
Cover Crops ◽  
Largemouth Bass
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