http://www.agricultura.gov.br/desenvolvimento-sustentavel/pl...

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Note added at 3 horas (2013-10-08 20:29:29 GMT)
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http://pt.wikipedia.org/wiki/Plantio_direto
http://en.wikipedia.org/wiki/Direct_planting


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Note added at 19 horas (2013-10-09 11:55:50 GMT)
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Re: 'palha'

The text is clearly a technical one, requiring the appropriate language. Although ‘direct seeding’ (or any of the alternatives mentioned under that suggestion) is quite sufficient, where writers do make explicit reference to the dead plant fiber from the previous crop (in this case ‘milho’ or ‘corn’) (US), the favored term appears to be ‘residue’:

Field Corn Production Guide
David Wright, Jim Marois, Jim Rich, and Richard Sprenkel
. . .
Since mulch from sod or crop residue conserves moisture, strip-till corn often yields more than conventional tilled, dryland corn in years when moisture is limited (Table 1). Residues of at least 3,000 pounds per acre are needed for effective erosion control. Research has shown that the more residue present, the more moderation of soil and plant canopy temperatures and the better the conservation of moisture. Water is usually the main limiting factor to corn production in Florida.
http://edis.ifas.ufl.edu/ag202


On-Farm Comparison of Conservation Tillage Systems for Corn Following Soybeans
Jodi DeJong-Hughes, Regional Extension Educator
Jeffrey Vetsch, Assistant Scientist
. . .
So why have producers in Minnesota been hesitant to switch over to a higher residue tillage system for corn? One of the biggest concerns is that increased levels of crop residue will result in cooler and wetter soils in the spring, which may delay planting of corn on poorly drained soils. These are typically the glacial till or lacustrine (lake sediment) soils of the state. Delayed planting can reduce yield potential and result in a higher moisture content in grain at harvest. Leaving a high level of residue on the soil has less effect on soybean emergence and growth, since soybeans are planted later, when soils are warmer and drier.
http://www.extension.umn.edu/distribution/cropsystems/DC8483...


Researchers from Cornell (Scott et al., 1987) have reported successfully seeding cover crops during the late spring in fields that were tilled with minimal residue on the soil surface with no impact on crop yields.
http://extension.psu.edu/plants/crops/soil-management/cover-...



Strip tillage for high-residue irrigated cropping systems

Local research conducted on a farm in 2009 near Jamieson, Oregon, by Jensen and Norberg showed that yields of corn grown under strip tillage planted into wheat residue matched conventional yields and that six separate field operations, including two diskings, one field cultivation, fertilizer application, and a dammer-diker, were replaced with a flailing and a strip tillage operation (table 1).
. . .
Manage residue. Planning your future crop rotations will help you avoid problems. When harvesting the crop previous to strip tillage, ensure that residue is evenly spread. Many times leaving the residue attached to the ground will aid in reducing plugging of strip tillage equipment. Residue levels may become more than strip tillage and planting can handle especially in small-seeded crops. In these situations, consider grazing, baling, or use of a rolling stalk chopper or turbo till to reduce size and total amount of residue.
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&c...








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Note added at 19 horas (2013-10-09 11:56:29 GMT)
--------------------------------------------------

Re: 'palha':

The text is clearly a technical one, requiring the appropriate language. Although ‘direct seeding’ (or any of the alternatives mentioned under that suggestion) is quite sufficient, where writers do make explicit reference to the dead plant fiber from the previous crop (in this case ‘milho’ or ‘corn’) (US), the favored term appears to be ‘residue’:

Field Corn Production Guide
David Wright, Jim Marois, Jim Rich, and Richard Sprenkel
. . .
Since mulch from sod or crop residue conserves moisture, strip-till corn often yields more than conventional tilled, dryland corn in years when moisture is limited (Table 1). Residues of at least 3,000 pounds per acre are needed for effective erosion control. Research has shown that the more residue present, the more moderation of soil and plant canopy temperatures and the better the conservation of moisture. Water is usually the main limiting factor to corn production in Florida.
http://edis.ifas.ufl.edu/ag202


On-Farm Comparison of Conservation Tillage Systems for Corn Following Soybeans
Jodi DeJong-Hughes, Regional Extension Educator
Jeffrey Vetsch, Assistant Scientist
. . .
So why have producers in Minnesota been hesitant to switch over to a higher residue tillage system for corn? One of the biggest concerns is that increased levels of crop residue will result in cooler and wetter soils in the spring, which may delay planting of corn on poorly drained soils. These are typically the glacial till or lacustrine (lake sediment) soils of the state. Delayed planting can reduce yield potential and result in a higher moisture content in grain at harvest. Leaving a high level of residue on the soil has less effect on soybean emergence and growth, since soybeans are planted later, when soils are warmer and drier.
http://www.extension.umn.edu/distribution/cropsystems/DC8483...


Researchers from Cornell (Scott et al., 1987) have reported successfully seeding cover crops during the late spring in fields that were tilled with minimal residue on the soil surface with no impact on crop yields.
http://extension.psu.edu/plants/crops/soil-management/cover-...



Strip tillage for high-residue irrigated cropping systems

Local research conducted on a farm in 2009 near Jamieson, Oregon, by Jensen and Norberg showed that yields of corn grown under strip tillage planted into wheat residue matched conventional yields and that six separate field operations, including two diskings, one field cultivation, fertilizer application, and a dammer-diker, were replaced with a flailing and a strip tillage operation (table 1).
. . .
Manage residue. Planning your future crop rotations will help you avoid problems. When harvesting the crop previous to strip tillage, ensure that residue is evenly spread. Many times leaving the residue attached to the ground will aid in reducing plugging of strip tillage equipment. Residue levels may become more than strip tillage and planting can handle especially in small-seeded crops. In these situations, consider grazing, baling, or use of a rolling stalk chopper or turbo till to reduce size and total amount of residue.
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&c...