Remote sensing for resources development and environmental management: Remote sensing for resources development and environmental management

Damen, M. C. J.

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Multivolume work

Persistent identifier:: 856342815

Title:: Remote sensing for resources development and environmental management

Sub title:: proceedings of the 7th international Symposium, Enschede, 25 - 29 August 1986

Year of publication:: 1986

Place of publication:: Rotterdam; Boston

Publisher of the original:: A. A. Balkema

Identifier (digital):: 856342815

Language:: English

Additional Notes:: Volume 1-3 erschienen von 1986-1988

Editor:: Damen, M. C. J.

Document type:: Multivolume work

Volume

Persistent identifier:: 856343064

Title:: Remote sensing for resources development and environmental management

Sub title:: proceedings of the 7th international Symposium, Enschede, 25 - 29 August 1986

Scope:: XV, 547 Seiten

Year of publication:: 1986

Place of publication:: Rotterdam; Boston

Publisher of the original:: A. A. Balkema

Identifier (digital):: 856343064

Illustration:: Illustrationen, Diagramme

Signature of the source:: ZS 312(26,7,1)

Language:: English

Usage licence:: Attribution 4.0 International (CC BY 4.0)

Editor:: Damen, M. C. J.

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2016

Document type:: Volume

Collection:: Earth sciences

Chapter

Title:: 4 Renewable resources in rural areas: Vegetation, forestry, agriculture, soil survey, land and water use. Chairman: J. Besenicar, Liaisons: M. Molenaar, Th. A. de Boer

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Chapter

Title:: Farm development using aerial photointerpretation in Ruvu River Valley, Ragamoyo, Tanzania, East Africa. B. P. Mdamu & M. A. Pazi

Document type:: Multivolume work

Structure type:: Chapter

486 MAPSYMBOL DESCRIPTION OF PHYSIOGRAPHY SOIL CLASSIFICATION A Deep poorly drained heavy soils on level plain with recent alluvial deposits. flat flood 1. 2. 3. Utric Fluvisols Utric Gley sols Pellic vertisols C Deep excessively drained sands, sands to sandy lo ams over sandy clayson level to gently undulating coastal plain. 1. 2. 3. 4. Albic Arenosols Cambie 'Arenosols Othic Luvisols Eutrigle sols soil properties considered in describing the profiles. In this survey the level of mapping the area was limited only to main land type. 2.5 Map compillation and Field work During field work, location of pits and observation on mapping Unit, boundaries were marked on 1:100,000 topographical map. Field surveying traverses were made along the farm boundary and across the farm area. Nearly, all profile pits were dug to depths of 150cm in order to check the ground water table and the soil parent material. Each horizon in a profile was examined for the study of soil development. The major pa rameters commonly looked for in the profile are depth of individual horizon, colour (dry and moist), texture, structure, consi stency porosity, parent material, presence/ absence of roots and fauna, presence of carbonates, concretions and cracks. pH, Conductivity, texture were measured separa tely in the laboratory together with other chemical analyses. Colour notations were referred to the Munsel Coloiir Chart (Soil Test inc. USA, 1971 Edition). Profile pits were described using (Guidelines for Soil Profile Pescription - FA0) and soil samples were sent to the Laboratory for some physi cal and chemical analyses. The final soil map was produced at a scale of 1:10,000 as proposed by the client to facilitate farm planning and land use purposes. Due to field obstacles earlier observed during the reconnaisance field trip, soil observations at the far southern parts of the project area on the alluvial plain, were not made. Soils in these parts were extrapolated from aerial photo-interpre tation and the physiographical map. Nor mally the alluvial plain area, consists of poorly drained heavy clay soils subje cted to frequent flooding by river over flow’s of the Ruvu River, whereas the Coa stal Plain soils range from deep excessi vely drained sands to sandy clay loams. 3. SOIL CLASSIFICATION AND MAPPING 3.1 Soil Laboratory data and results 1. pH and Ec were determined by using the 1:5 soil to water ratio method. 2. Particle size analysis was carried out using the hydrometer. 3» Available phosphorus was determined by using the Dickman and Bray 1 method. 4. Exchangeable cations Na, K, Ca, Mg, were determined by leaching the soils in Ammonium Acetate extracting solution IN. 5. Organic carbon % was determined by using the Walkley and Black method. 6. Available Nitrogen % was determined using the Alkaline permanganate method. 7. C.E.C. was not determined but was approvimated by adding the total of bases. 3.2. Results 1. From soil analytical data the soils in the area are non-saline. However the subsoils have an increased amount of solu ble salts. In general the pH of the soils indicate that the soils are acidic. It will be necessary to raise the pH to about 7.0 as the pH common to most plants is 6-8. SCALE 1:500,000. MI QUATERNARY. Coastal plain deposits reworked clays silts, sands and rare grovels QUANTERNARY Alluvial deposits (clays, silts, sands and rare gravels.) NEOGENS (MIOCENE PLIOCENE) Undifterentated sedimentary deposits interbecfded .sandy c * :y , and clayey sands ¿ravel scattered thoughoul in a clay matrix Cretaceous thin san d stones sandy limestones and shales Figure 3 Geology* of the farm area

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