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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados; Embrapa Solos; Embrapa Trigo. |
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Data corrente: |
18/12/1995 |
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Data da última atualização: |
18/10/2001 |
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Autoria: |
MADEIRA NETTO, J. da S. |
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Título: |
Soil, water, and nutrient losses from four watersheds near Lincoln, Nebraska. |
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Ano de publicação: |
1978 |
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Fonte/Imprenta: |
Lincoln: University of Nebraska, 1978. |
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Páginas: |
198p. |
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Idioma: |
Inglês
Português |
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Notas: |
Master Thesis. |
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Conteúdo: |
Runoff, soil and nutrient losses were monitored from 1972 to 1976 from three row cropped watersheds with different conservation treatments and from 1972 to 1974 from a bromegrass treatments involved in the row-cropped watersheds were: (1) non-conservation (row cropped using conventional turn plow tillage with rows run parallel to fieldborders, and non-terraced), (2) grassed waterway (steep backslope terraces with grassed waterway, row cropped using till-planting on the contour), (3) tile outlet (steep back slope terraces with underground waterways, row cropped using till-planting on the contour). The bromegrass watershed was kept ungrazed during the first year of the experiment (1972) and heavily grazed on the other two years (1973 and 1974). The slopes in al l watersheds were approximately the same and averaged 5 to 8 percent. The soil of all watersheds was a Sharpsburg Silty Clay Loam. Annhydrous ammonia at the rate of 224 Kg/ha/year was the only fertilizer applied to the row cropped watersheds. Average precipitation for the period of study was 66.2 cm which is 6.6 cm below the 76 year average fro Lincoln, Neb. Two of the years (1974 and 1975) were extremely dry with precipitations 30 cm below the average; two of the years (1972 and 1976) had about 24 cm above average. Average annual soil and water losses from all watersheds were relatively low during the period of study. The soil loss limit of 10 ton/ha/year considered acceptable for the Sharpsburg Silty Clay Loam was never exceeded on any of the................ MenosRunoff, soil and nutrient losses were monitored from 1972 to 1976 from three row cropped watersheds with different conservation treatments and from 1972 to 1974 from a bromegrass treatments involved in the row-cropped watersheds were: (1) non-conservation (row cropped using conventional turn plow tillage with rows run parallel to fieldborders, and non-terraced), (2) grassed waterway (steep backslope terraces with grassed waterway, row cropped using till-planting on the contour), (3) tile outlet (steep back slope terraces with underground waterways, row cropped using till-planting on the contour). The bromegrass watershed was kept ungrazed during the first year of the experiment (1972) and heavily grazed on the other two years (1973 and 1974). The slopes in al l watersheds were approximately the same and averaged 5 to 8 percent. The soil of all watersheds was a Sharpsburg Silty Clay Loam. Annhydrous ammonia at the rate of 224 Kg/ha/year was the only fertilizer applied to the row cropped watersheds. Average precipitation for the period of study was 66.2 cm which is 6.6 cm below the 76 year average fro Lincoln, Neb. Two of the years (1974 and 1975) were extremely dry with precipitations 30 cm below the average; two of the years (1972 and 1976) had about 24 cm above average. Average annual soil and water losses from all watersheds were relatively low during the period of study. The soil loss limit of 10 ton/ha/year considered acceptable for the Sharpsburg Silty Clay Loam was nev... Mostrar Tudo |
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Palavras-Chave: |
Erosion; Losses; Nutrientes; Solos. |
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Thesagro: |
Agricultura; Água; Bacia Hidrográfica; Conservação do Solo; Enxurrada; Erosão; Nutriente; Perda; Solo. |
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Thesaurus Nal: |
nutrients; runoff; soil; soil conservation; water; watersheds. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02412nam a2200361 a 4500
001 1560260
005 2001-10-18
008 1978 bl uuuu m 00u1 u #d
100 1 $aMADEIRA NETTO, J. da S.
245 $aSoil, water, and nutrient losses from four watersheds near Lincoln, Nebraska.
260 $aLincoln: University of Nebraska$c1978
300 $a198p.
500 $aMaster Thesis.
520 $aRunoff, soil and nutrient losses were monitored from 1972 to 1976 from three row cropped watersheds with different conservation treatments and from 1972 to 1974 from a bromegrass treatments involved in the row-cropped watersheds were: (1) non-conservation (row cropped using conventional turn plow tillage with rows run parallel to fieldborders, and non-terraced), (2) grassed waterway (steep backslope terraces with grassed waterway, row cropped using till-planting on the contour), (3) tile outlet (steep back slope terraces with underground waterways, row cropped using till-planting on the contour). The bromegrass watershed was kept ungrazed during the first year of the experiment (1972) and heavily grazed on the other two years (1973 and 1974). The slopes in al l watersheds were approximately the same and averaged 5 to 8 percent. The soil of all watersheds was a Sharpsburg Silty Clay Loam. Annhydrous ammonia at the rate of 224 Kg/ha/year was the only fertilizer applied to the row cropped watersheds. Average precipitation for the period of study was 66.2 cm which is 6.6 cm below the 76 year average fro Lincoln, Neb. Two of the years (1974 and 1975) were extremely dry with precipitations 30 cm below the average; two of the years (1972 and 1976) had about 24 cm above average. Average annual soil and water losses from all watersheds were relatively low during the period of study. The soil loss limit of 10 ton/ha/year considered acceptable for the Sharpsburg Silty Clay Loam was never exceeded on any of the................
650 $anutrients
650 $arunoff
650 $asoil
650 $asoil conservation
650 $awater
650 $awatersheds
650 $aAgricultura
650 $aÁgua
650 $aBacia Hidrográfica
650 $aConservação do Solo
650 $aEnxurrada
650 $aErosão
650 $aNutriente
650 $aPerda
650 $aSolo
653 $aErosion
653 $aLosses
653 $aNutrientes
653 $aSolos
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Embrapa Cerrados (CPAC) |
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