PPT-Highly Weathered Soils and Tropical Environments: Opportuni

Russell Yost 1 BaoShen Li 2 Prof Xiaolin Li 2 ZuChao 3 1 Tropical Plant and Soil Sciences University of Hawaii at Manoa Honolulu Hawaii 2 China Agricultural University Beijing China. 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. Winton Gale. Managing Director. SCT Operations PTY LTD, Australia. Ian Sheppard. Environment and Community Manager. Xstrata Coal, Tahmoor Colliery, Australia. Location of the Mine Area. Picton. Mittagong . TOPSOIL?. Horizon O. Horizon A. Horizon B. Horizon D or R. 2. Which statement best describes the BEDROCK?. Mixture of sand, silt, and clay. Gravel and cement. Partially weathered rocks. Solid rocks that have not been weathered. 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. Most of . OUR FOOD . comes from the Prairies!. Including corn, wheat and soybeans…. Can you think of things that are made out of these products?. Prairie . Soils. are a type of . GRASSLAND. . . It is too . 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; . Agency: Department of Labor Branch: Employment and Training Administra�on Programs with PZ Bene�ts: Reentry Employment Opportuni�es Reentry Employment Opportunit Russell Yost. Tropical Plant and Soil Sciences. University of Hawai`i at . Manoa. Honolulu, Hawai`i. Goals – Opportunities and Constraints with Highly Weathered Soils. Food security. High diversity of crop types (both annual and perennial) relative to temperate crops . 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- .