PPT-Highly Weathered Soils and Tropical Environments: Opportunities and Constraints

Russell Yost Tropical Plant and Soil Sciences University of Hawaii at Manoa Honolulu Hawaii Goals Opportunities and Constraints with Highly Weathered Soils Food security High diversity of crop types both annual and perennial relative to temperate crops . raengorgukAM Published by Royal Academy of Engineering Prince Philip House 3 Carlton House Terrace London SW1Y 5DG Tel 020 7766 0600 Fax 020 7930 1549 wwwraengorguk Registered Charity Number 293074 Front cover photo Dental framework being made by the Earth System Sensitivities. Peter Cox. Professor of Climate System Dynamics. University of Exeter. How can we constrain . long-term Earth System Projections . using short-term Observations ?. Climate Sensitivity to Doubling CO. Here we go!. Soil Profiles of the Principal Terrestrial Soil Types . Figure 3-24. Fig. 3-24a, p. 69. Mosaic of closely packed pebbles, boulders. Weak humus-mineral mixture. Dry, brown to reddish-brown with variable accumulations of clay, calcium and carbonate, and soluble salts. Dr Sylvia Shaw. Middlesex University. The research project : “Gender and Linguistic. Participation in the Devolved Parliaments of . the UK”. An ESRC funded project that aims to investigate gender and linguistic participation in the ‘new’ devolved institutions of the UK: The Scottish parliament, the National Assembly for Wales and the Northern Ireland Assembly. Russell Yost. 1. , . Bao-Shen. Li. 2. , Prof. . Xiaolin. Li. 2. , ZuChao. 3. 1. Tropical Plant and Soil Sciences. University of Hawai`i at . Manoa. Honolulu, Hawai`i. 2. China Agricultural University, Beijing, China. Soil Types. 12 Soil Orders. Soil Orders in US. World View. ALFISOL. Moderately Weathered. ANDISOL. Volcanic ash. ARIDISOL. Very Dry. ENTISOL. Newly Formed. Gelisol. Frozen. HISTOSOL. Organic, Wet. INCEPTISOL. . on top, but not fertile . soil. … . Tropical soils are found under . very hot . conditions, and high yearly . rainfall. .. They are the worlds oldest. soils. . They are so old, that they are . RUSTY. group of ecosystems that have same climate & dominant communities. TROPICAL RAIN FOREST. has most species, BIODIVERSITY. canopy = top |  understory =  below canopy . hot & wet year round; . . Place. 12. . Reality check l. Version 1. Identify the constraints and opportunities in meeting your FMU goals. Use facilitation skills with co-management partners in focus group discussions (FGDs). Geomorphology (. GEO 301). Geology and Geophysics Department. College of Science. King Saud University. WEATHERING PROCESSES. Weathering is the breakdown of rocks by . mechanical disintegration . and chemical decomposition.. The soil is the upper layers of the . regolith. that is accumulated materials of weathering product and thus supports plant growth. . Weathering Products. : . Product of weathering is . regolith. or . Soils support the growth of higher plants by providing a medium for plant roots and supplying nutrient elements that are essential to the entire plant.. Soil properties are the principal factor controlling the fate of water in the hydrologic system. Water loss, utilization, contamination and purification are all affected by the soil.. Figure 3-24. Fig. 3-24a, p. 69. Mosaic of closely packed pebbles, boulders. Weak humus-mineral mixture. Dry, brown to reddish-brown with variable accumulations of clay, calcium and carbonate, and soluble salts. Knowing where modem carbonates occur, what they . are composed of, and what their controls are is . essen. - . tial. for evaluating . microfacies. data. The objectives of . this chapter are to summarize the settings and environ- .