An approach for combining remote sensing spectral measurements with an ecosystem model was presented in an accompanying article. The sahelian grassland ecosystem STEP model developed for that purpose was also described and validated. In order to fulfill a prerequisite for using coarse resolution ...
Seen, D. lo
,
Mougin, E.
,
Rambal, S.
,
Gaston, A.
,
Hiernaux, Pierre H.Y.
,
[A regional sahelian grassland model to be coupled with multispectral satellite data. II. Toward the control of its simulations by remotely sensed indices]
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A regional sahelian grassland model to be coupled with multispectral satellite data. II. Toward the control of its simulations by remotely sensed indices
Crop growth on acid sandy soils of the Sudano-Sahelian zone is primarily limited by the low amounts of organic matter and available mineral nutrients in the topsoil. The shortening of fallow periods with population growth, the exploitation of fire wood, spatial nutrient transfers by wind and wate...
Buerkert, Andreas
,
Hiernaux, Pierre H.Y.
,
[Nutrients in the West African Sudano-Sahelian zone: Losses, transfers and role of external inputs]
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Nutrients in the West African Sudano-Sahelian zone: Losses, transfers and role of external inputs
Alfisols, Vertisols, Inceptisols, Aridisols, Mollisols, and Entisols were sampled (0-30 cm) from 32 locations across Ethiopia. The soils were analyzed for copper (Cu), zinc (Zn), manganese (Mn), and iron (Fe) contents using 0.005 M diethylene triamine pentaacetic acid (DTPA), 0.05 M hydrochloric ...
Haque, I.
,
Lupwayi, N.Z.
,
Tadesse, T.
,
[Soil micronutrient contents and relation to other soil properties in Ethiopia]
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Soil micronutrient contents and relation to other soil properties in Ethiopia
The changes in soil pH and mineral N concentrations of cattle and sheep urine patches were compared to those occurring in fertilizer urea placement zones in a study in Niger. Urine and fertilizer solutions each containing 400 mg N (800 kg N/ha) were spread onto individual plots covering a surface...
Somda, Z.C.
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Powell, J.M.
,
Bationo, B. André
,
[Soil PH and nitrogen changes following cattle and sheep urine deposition]
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Soil PH and nitrogen changes following cattle and sheep urine deposition
Studies of potassium (K) fixation in the soil were conducted by evaluating the effect of applied K on the extractability of K with time. A series of five K-sorption treatment solutions, 0.11, 0.22, 0.45, 0.90, and 1.80 cmol/kg were prepared and applied as potassium chloride (KC1) to three sets of...
Tening, A.S.
,
Omueti, J.A.I.
,
Tarawali, G.
,
[Fixation of potassium in some soils of the subhumid zone of Nigeria]
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Fixation of potassium in some soils of the subhumid zone of Nigeria
Soil compaction is often responsible for the poor establishment of trees on restored brownfield sites. This paper examines the root development, survival and growth of Alnus cordata, Larix kaempferi, Pinus nigra and Betula pendula after cultivation with complete cultivation, a standard industrial...
Sinnett, D.
,
Poole, Elizabeth J.
,
Hutchings, T.R.
,
[A comparison of cultivation techniques for successful tree establishment on compacted soil]
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A comparison of cultivation techniques for successful tree establishment on compacted soil
From 2004 to 2010, the Sino-German research group MAGIM (Matter fluxes of Grasslands in Inner Mongolia as affected by grazing) ran a grazing experiment in a typical steppe ecosystem in Inner Mongolia, North China. Multiple ecological effects of grazing, climate variability and topography on plant...
Hoffmann, C.
,
Giese, M.
,
Dickhoefer, Uta
,
Hongwei Wan
,
Yongfei Bai
,
Steffens, Markus
,
Chunyan Liu
,
Butterbach-Bahl, Klaus
,
Xingguo Han
,
[Effects of grazing and climate variability on grassland ecosystem functions in Inner Mongolia: Synthesis of a 6-year grazing experiment]
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Effects of grazing and climate variability on grassland ecosystem functions in Inner Mongolia: Synthesis of a 6-year grazing experiment
In 1998, Fisher et al. attempted to draw together published and anecdotal information to answer some of the questions raised by the findings of Fisher et al. (1994; 1995), that introduced pastures of African grasses on the eastern plains of Colombia accumulated large amounts of C in the soil. Thi...
Fisher, Myles J.
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Santos, R.S.M. dos
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Alves, B.J.R.
,
Boddey, Robert M.
,
[Another dimension to grazing systems : Soil carbon]
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Another dimension to grazing systems : Soil carbon
Kamaa, M
,
Mburu, H
,
Blanchart, E
,
Chibole, L
,
Chotte, Jean-Luc
,
Kibunja, C.N.
,
Lesueur, Didier
,
[Effects of organic and inorganic fertilization on soil bacterial and fungal microbial diversity in the Kabete long-term trial, Kenya]
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Effects of organic and inorganic fertilization on soil bacterial and fungal microbial diversity in the Kabete long-term trial, Kenya
During the 1990s, a soils database was developed by the International Soil Reference and Information Centre in The Netherlands for the project “World Inventory of Soil Emission Potentials” (WISE). Using this database, we converted 1125 soil profiles from around the world into a format that can be...
Gijsman, A.J.
,
Thornton, Philip K.
,
Hoogenboom, Gerrit
,
[Using the WISE database to parameterize soil inputs for crop simulation models]
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Using the WISE database to parameterize soil inputs for crop simulation models