Published 2000 .
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Thesis (Ph.D.) - Loughborough University, 2000.
|Statement||by Frans-Bauke Willem van der Meer.|
Download Modelling tropical soil water regimes in semi-arid environments
Modelling tropical soil water regimes in semi-arid environments Soil moisture available to crops is among the main constraints on crop production by smallholder farmers in semi-arid Zimbabwe. Other restrictions, such as limited use of fertilisers and herbicides, stem primarily from socio-economic rather than biophysical constraints.
Cited by: 4. Knowledge about soil moisture dynamics and their relation with rainfall, evapotranspiration, and soil physical properties is fundamental for understanding the hydrological processes in a region.
Given the difficulties of measurement and the scarcity of surface soil moisture data in some places such as Northeast Brazil, modelling has become a robust tool to overcome such by: 9. Surface soil moisture plays a key role in the hydrological cycle as it controls the water fluxes between soil, vegetation, and atmosphere [1,2,3].Moreover, knowledge about soil moisture is widely required in many agricultural studies and applications related to irrigation management [1,4,5,6].Therefore, monitoring and understanding of soil moisture variability and its exchange relationships Cited by: 9.
Mark works on a variety of topics in the areas of environmental spatial policy support, ecosystem service modelling and understanding environmental change, at scales from local to global and with a particular emphasis on tropical forests in Latin America and semi-arid.
PDF | Land degradation occurs in all the climatic regions, however, the adverse effects are more pronounced in the semiarid tropical (SAT) environments | Find, read and cite all the research.
Pedro H. Medeiros, Andreas Güntner, Till Francke, George L. Mamede and José Carlos de Araújo, Modelling spatio-temporal patterns of sediment yield and connectivity in a semi-arid catchment with the WASA-SED model, Hydrological Sciences Journal, /, 55, 4. Muchow, R.C., a. Phenology, seed yield and water use of grain legumes grown under different soil water regimes in a semi-arid tropical environment.
Field Crops Res., Muchow, R.C., b. Canopy development in grain legumes grown under different soil water regimes in a semi-arid tropical environment. Field Crops Res., Semiarid regions are a subtype of dry land with an aridity index (i.e., ratio of total annual precipitation to potential evapotranspiration) between and (Lal, ).Soils in semiarid regions have frequently been degraded by historical land use, resulting in low soil.
Modeling the benefits of soil water conservation using the PARCH model-a case study from a semi-arid region of Kenya. Journal of Arid environments 41(3), WOCAT. Where the land is greener. Case studies and analysis of soil and water conservation initiatives worldwide. Editors H.P.
Liniger and W. Critchley. We analyzed a crop‐year database of irrigated and dryland wheat data from Bushland, TX, to develop relationships that define the grain yield and water‐use efficiency (WUE) response to a wide range in seasonal evapotranspiration (ET) associated with water deficits and to evaluate yield response to stored soil water at planting.
using apsim-model as a decision-support-tool for long-term integrated-nitrogen-management and maize productivity under semi-arid conditions in kenya - volume 52 issue 2 - m.
oscar kisaka, m. mucheru-muna, f. ngetich, j. mugwe, d. mugendi, f. mairura, j. muriuki. Conservation tillage practices can potentially address the soil and water management constraints faced by smallholder farmers in semi-arid areas.
In view of this, several studies have been conducted on water and soil management in semi-arid areas (Twomlow and Dhliwayo,Twomlow and Bruneau,Nyagumbo, ). These differ from more tropical semi-arid areas or highlan d.
have evolved in arid and semi-arid environments. These examples should sufﬁce to show A model that included soil K amount. The short rainfall regimes in the semi-arid regions brings ofelectrical conductivity ( soil: water) with RPIQ of and RPD ofCa content with RPIQ of and RPD of Testing the CERES-Maize simulation model in a semi-arid tropical environment.
Field Crops Res., Crop simulation models are proposed as tools for agricultural risk analysis in order to explore potential cropping locations and appropriate farming systems in the semi-arid tropics. Soil water and nutrients are major factors limiting crop productivity.
In the present study, soil water use efficiency (WUE) and crop yield of millet and soybean were investigated under nine fertilization regimes (no nitrogen (N) and no phosphorus (P) (CK), kg ha −1 N and no P (N1P0), kg ha −1 N and no P (N2P0), 45 kg ha −1 P and no N (N0P1), 90 kg ha −1 P and no N (N0P2), The response to terminal water deficit stress of three grain legumes, soybean, cowpea and pigeonpea, was evaluated in plants grown in large tubes, in competition with either the same species or one of the other two species.
The aim was to explore how species differences in drought response affected water use, growth and survival of plants in pure stand and in competition.
Two plants. This study assessed the impact of climate change on the hydrological regime of the Paraguaçu river basin, northeastern Brazil. Hydrological impact simulations were conducted using the Soil and Water Assessment Tool (SWAT) for – Precipitation and surface air temperature projections from two Regional Climate Models (Eta-HadGEM2-ES and Eta-MIROC5) based on IPCC5—RCP.
In arid/semi‐arid environments, where rainfall is seasonal, highly variable and significantly less than the evaporation rate, groundwater discharge can be a major component of the water and salt balance of a wetland, and hence a major determinant of wetland ecology.
Understanding the influences of rainfall and temperature on soil water and the grain production of winter wheat (Triticum aestivum L.), is of great importance to ensure the sustainability of food production on the Loess Plateau of China.
Based on calibration and evaluation, the Environmental Policy Integrated Climate (EPIC) model was employed to determine the response of soil water and winter. Morin J., Rawitz E., Hoogmoed W.B. and Benyamini Y. Tillage practice for soil and water conservation in the semi-arid zone.
-off modeling as a tool for conservation tillage design. Soil and Tillage Research 4: Naghan G.P. Ecology of floodwater farming in N.
America. Agro-ecosystem 5: Narayana V.V. Dhruva and. The Reference Soil Group of the Durisols is represented in arid and semi-arid environments and holds very shallow to moderately deep, free-draining soils that contain cemented secondary silica (SiO 2) in the upper metre of soil.
Durisols are internationally known as "hardpan soils" (Australia) or "dorbank" (South Africa) or they represent the. Based on the assumption that C‐N interactions regulate soil N availability and conservation, this paper explores C‐N interactions in soil under the canopy of two FI legume species (Prosopis laevigata and Parkinsonia praecox) and bare ground areas adjacent to FI species during wet and dry seasons in a tropical semi‐arid ecosystem in.
Next / / Hydrological Modelling in Arid and Semi-Arid Areas. single. 27; Jun; The Journal of Arid Environments is an international journal publishing original scientific and technical research articles on physical, biological and cultural aspects of arid, semi-arid, and desert environments.
As a forum of multi-disciplinary and interdisciplinary dialogue it addresses research on all aspects of arid environments and their. This study examined the applicability of the CERES-Wheat model under variable climatic, irrigation, and fertilizer-nitrogen (N) regimes.
The objective was to analyze wheat yield responses to water- and N-application for optimizing crop productivity under water limitations in a semi-arid sub-tropical irrigated environment.
Perspectives of the Hydrology of the Arid and Semi-Arid Lands of Kenya: /ch ASALs in the tropics present challenges to sustainable livelihoods that include; drought vagaries, land use/change, and increasing population with inherent. I am modelling a catchment located in a semi-arid climate using ArcSWAT The aim is to simulate water balance and see the impact of land use change in the catchment.
UNESCO – EOLSS SAMPLE CHAPTERS LAND USE, LAND COVER AND SOIL SCIENCES – Vol. VII – Soils of Arid and Semi-Arid Areas - Willy Verheye ©Encyclopedia of Life Support Systems (EOLSS) CaCO + H CO Ca + 2HCO Ca(HCO) 3 32↔↔ (2) 2NaX + CaSO CaX + Na SO↔ (3) Na SO +10H O Na SOH O24 2 2 4 2↔ (4) Because the wetting front is limited to the upper part of the soil.
Such environments are characterized by high soil erosion hazards, particularly under humid, subhumid, or semi-arid rainfall regimes. Conservation provisions are, therefore, necessary for preventing degradation of soil and protecting the quality of water resources under pineapple culture.
Hydrological Modelling in Arid and Semi-Arid Areas bite. Hydrological Modelling in Arid and Semi-Arid Areas. Pre-independence soil and water conservation in Zimbabwe. Soil and water conservation in Zimbabwe (formerly Rhodesia) dates back to the early ′ s following the introduction of the plough and permanent settlements.
The plough was introduced around ′ s following the arrival of white settlers. The introduction of permanent settlements and the plough also saw the. Hydrological Modelling in Arid and Semi-Arid Areas.
By cyrex. in Hydrological Modelling in Arid and Semi-Arid Areas. The objective was to analyze wheat yield responses to water- and N-application for optimizing crop productivity under water limitations in a semi-arid sub-tropical irrigated environment.
Abstract In arid/semi‐arid environments, Secondary salinity can impact on wetland biota through changes in both salinity and water regime, which result from the hydrological and hydrogeological changes associated with secondary salinity. Xiaoyu Liu, Modeling of Soil Water and Salt Dynamics and Its Effects on Root Water Uptake in Heihe.
Napier grass (Pennisetum purpureum Schumach.) is an important fodder and relatively drought-tolerant crop in tropical and subtropical regions, especially in developing countries.
For this and other species, tools are needed for identifying drought-tolerant cultivars to aid selection for semi-arid environments.
We determined tissue water status, carbon assimilation, biomass yield and forage. target. In addition to improving soil fertility, water harvesting, enhancing the soil-water retention capacity and reducing soil erosion are measures that could significantly improve agricultural productivity in rainfed marginal environments.
Thus, soil and water conservation practices are becoming increasingly important in the arid and semi-arid.
A recent study showed how, contrary to encroachment by the invasive alien tree species Prosopis julifora (referred to as “Mathenge” in Kenya or “Promi” in Baringo), the revival of grasslands in tropical semi-arid areas can alleviate the effects of climate change as well as restore important benefits typically provided by healthy grasslands for agro-pastoralist and pastoralist communities.
We research and teach about soil, water, and environmental sciences in urban, agricultural, and natural ecosystems. As a University of Florida department within the Institute of Food and Agricultural Sciences and the College of Agricultural and Life Sciences, we offer degree, certificate and extension programs on campus and online.
Background and Aims. Soil phosphorus (P) solubility declines sharply when a flooded soil drains, and an important component of rice (Oryza sativa) adaptation to rainfed lowland environments is the ability to absorb and utilize P under such aim of this study was to test the hypothesis that rice cultivars differ in their P responses between water regimes because P uptake.
The agricultural practices such as irrigation, to cope with water deficiency have been increasing soil salinity [15, 16] in arid and semi-arid regions.
Plant community structures are highly fragile and greatly affected by edaphic and environmental factors such as water availability and soil salinity [ 17, 18 ].Fluxes of CO 2 measured with the eddy covariance methodology during two short periods at a semi arid site in central Sudan indicate that this ecosystem was a sink for carbon both during the dry and wet season Small differences in plant available soil water content had a strong influence on CO 2 flux.
Fluxes presented here are comparable.