Wszystkie pola: J. C - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Application of SLEMSA and USLE erosion models for potential erosion hazard mapping in South-Eastern Nigeria
Autorzy:: Igwe, C.A.
Akamigbo, F.O.R.
Mbagwu, J.S.C.
Powiązania:: https://bibliotekanauki.pl/articles/25180.pdf
Data publikacji:: 1999
Wydawca:: Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:: USLE model
USLE mapping model
topography
cartography
SLEMSA erosion model
environment
soil erosion
USLE erosion model
Africa
SLEMSA model
Tropics,The
Nigeria
Źródło:: International Agrophysics; 1999, 13, 1
0236-8722
Pojawia się w:: International Agrophysics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: The use of some soil aggregate indices to assess potential soil loss in soils of south-eastern Nigeria
Autorzy:: Igwe, C.A.
Akamigbo, F.O.R.
Mbagwu, J.S.C.
Powiązania:: https://bibliotekanauki.pl/articles/25830.pdf
Data publikacji:: 1995
Wydawca:: Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:: aggregate index
erosion
soil loss
soil erosion
texture
soil aggregate
potential
flocculation
Nigeria
Źródło:: International Agrophysics; 1995, 09, 2
0236-8722
Pojawia się w:: International Agrophysics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Spatial variability of uncultivated soils in derived savanna
Autorzy:: Obalum, S.E.
Oppong, J.
Igwe, C.A.
Watanabe, Y.
Obi, M.E.
Powiązania:: https://bibliotekanauki.pl/articles/25426.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Instytut Agrofizyki PAN
Opis:: The spatial variability of some physicochemical properties of topsoils/subsoils under secondary forest, grassland fallow, and bare-soil fallow of three locations was evaluated. The data were analyzed and described using classical statistical parameters. Based on the coefficient of variation, bulk density, total porosity, 60-cm-tension moisture content, and soil pH were of low variability. Coarse and fine sand were of moderate variability. Highly variable soil properties included silt, clay, macroporosity, saturated hydraulic conductivity, organic matter concentration, and cation exchange capacity. Overall, soil pH and silt varied the least and the most, respectively. Relative weighting showed that location dominantly influenced the soil variability, except for soil porosity and organic matter concentration influenced mostly by land use. Most of the soil data were normally distributed; others were positively skewed and/or kurtotic. The minimum number of samples (at 25 samples ha-1) required to estimate mean values of soil properties was highly soil property-specific, ranging from 1 (topsoil pH-H2O) to 246 (topsoil silt). Cation exchange capacity of subsoils related fairly strongly with cation exchange capacity of topsoils (R2 = 0.63). Spatial variability data can be used to extrapolate dynamic soil properties across a derived-savanna landscape.
Źródło:: International Agrophysics; 2013, 27, 1
0236-8722
Pojawia się w:: International Agrophysics
Dostawca treści:: Biblioteka Nauki

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