File:Typic Hapludoll (fine, mixed, active isohyperthermic) (5140045787).jpg

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Description This profile was photographed in a cultivated field in the state of Loreto, Peru. This soil is formed in fine textured basic sediments on a 3 percent slope under tropical rain forest vegetation. Basic sediments eroded from the nearby slopes of the Andean Mountains form strata in several parts of the upper Amazon Basin and when exposed serve as the parent material for chemically fertile soils. This profile, photographed when extremely dry barely qualifies as a Mollisol with a mollic epipedon just over 25 cm thick, consisting of moderately hard blocky peds that are less than 30 cm in diameter. A thin cambic horizon is seen between 25 and 35 cm. White calcium carbonate nodules are present below 100 cm but are not present in sufficient quantity to form a calcic horizon. These soils are highly valued for slash and burn cultivation practiced by the indigenous people. In contrast to the more prevalent Ultisols in the area these soils naturally vegetate more rapidly after food crop cultivation is abandoned, and that vegetation can be again be cut and burned in as little as five years. Weeds are a more significant problem in cultivated crops than on adjacent Ultisols and are most often the reason to abandon a cultivated site after two or three crops. Heat from burning kills weed seeds near the surface enabling relatively weed free growth for one or two crops.
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Source Typic Hapludoll (fine, mixed, active isohyperthermic)
Author Soil Science from Raleigh

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This file is licensed under the Creative Commons Attribution 2.0 Generic license.
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This image was originally posted to Flickr by SoilScience.info at https://flickr.com/photos/22503286@N06/5140045787 (archive). It was reviewed on 14 December 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

14 December 2019

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current20:35, 14 December 2019Thumbnail for version as of 20:35, 14 December 20191,080 × 1,612 (405 KB)Ser Amantio di Nicolao (talk | contribs)Transferred from Flickr via #flickr2commons

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