{"id":5524,"date":"2023-02-05T06:02:35","date_gmt":"2023-02-05T06:02:35","guid":{"rendered":"https:\/\/7thclass.deltapublications.in\/?page_id=5524"},"modified":"2024-12-21T06:54:25","modified_gmt":"2024-12-21T06:54:25","slug":"s-21-c-horizons-of-soil","status":"publish","type":"page","link":"https:\/\/7thclass.deltapublications.in\/index.php\/s-21-c-horizons-of-soil\/","title":{"rendered":"S-21.c Horizons Of Soil"},"content":{"rendered":"\n<h2 class=\"wp-block-heading has-text-align-center has-text-color\" style=\"color:#00056d;text-transform:uppercase\"><strong>Horizons Of Soil<\/strong><\/h2>\n\n\n\n<p class=\"has-text-color has-huge-font-size\" style=\"color:#74008b\"><strong>Key Notes :<\/strong><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"682\" src=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/10\/image-1.png\" alt=\"\" class=\"wp-image-9474\" style=\"width:516px;height:auto\" srcset=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/10\/image-1.png 800w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/10\/image-1-300x256.png 300w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/10\/image-1-768x655.png 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure><\/div>\n\n\n<h3 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-c6ad49e9e8f6d783ddd989768bdd756c\" style=\"color:#000060\"><strong>1. What Are Soil Horizons?<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>Soil horizons are layers in the soil that differ in color, texture, structure, and composition.<\/li>\n\n\n\n<li>They form through processes like weathering, organic decomposition, and leaching.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-0218d3ad4c3e03cf33a96c760cc6bedb\" style=\"color:#000060\"><strong>2. Major Soil Horizons<\/strong><\/h3>\n\n\n\n<ol class=\"wp-block-list has-large-font-size\">\n<li><strong>O Horizon (Organic Layer)<\/strong>\n<ul class=\"wp-block-list\">\n<li>Contains organic matter like decomposing leaves and plants.<\/li>\n\n\n\n<li>Found on the surface.<\/li>\n\n\n\n<li>Dark in color due to high organic content.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>A Horizon (Topsoil)<\/strong>\n<ul class=\"wp-block-list\">\n<li>Known as the most fertile layer.<\/li>\n\n\n\n<li>Contains a mix of organic matter and minerals.<\/li>\n\n\n\n<li>Crucial for plant growth.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>E Horizon (Eluviation Layer)<\/strong>\n<ul class=\"wp-block-list\">\n<li>Found beneath the A horizon.<\/li>\n\n\n\n<li>Lighter in color due to leaching of minerals like clay, iron, and aluminum.<\/li>\n\n\n\n<li>Often found in forested areas.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>B Horizon (Subsoil)<\/strong>\n<ul class=\"wp-block-list\">\n<li>Rich in minerals leached from the upper layers (e.g., iron, aluminum).<\/li>\n\n\n\n<li>Denser than topsoil, with less organic material.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>C Horizon (Parent Material)<\/strong>\n<ul class=\"wp-block-list\">\n<li>Made up of partially weathered rocks.<\/li>\n\n\n\n<li>Provides the base material for the formation of soil.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>R Horizon (Bedrock)<\/strong>\n<ul class=\"wp-block-list\">\n<li>The lowest layer.<\/li>\n\n\n\n<li>Consists of unweathered rock.<\/li>\n\n\n\n<li>Forms the foundation of the soil profile.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-large-font-size\"><strong>3. Formation of Soil Horizons<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>Weathering<\/strong>: Rocks break down into smaller particles over time.<\/li>\n\n\n\n<li><strong>Organic Activity<\/strong>: Plants and animals contribute organic matter.<\/li>\n\n\n\n<li><strong>Leaching<\/strong>: Water carries minerals from upper layers to lower ones.<\/li>\n\n\n\n<li><strong>Deposition<\/strong>: Accumulation of materials in specific layers.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-0654e20337d1a706076a79ba22522530\" style=\"color:#000060\"><strong>4. Importance of Soil Horizons<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>They help determine the soil&#8217;s ability to support plant growth.<\/li>\n\n\n\n<li>Different crops require different soil conditions, which are influenced by the horizon characteristics.<\/li>\n\n\n\n<li>Understanding horizons aids in soil conservation and management.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-c4be9aa7b8fa50c88ec353f2e9d16999\" style=\"color:#000060\"><strong>5. Visual Representation<\/strong><\/h3>\n\n\n\n<p class=\"has-large-font-size\">A labeled diagram showing the soil profile with layers (O, A, E, B, C, and R) will help students visualize the structure.<\/p>\n\n\n\n<p class=\"has-text-color has-large-font-size\" style=\"color:#d90000\"><strong>Let&#8217;s practice!<\/strong><\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/wordwall.net\/play\/82617\/896\/849\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-104.png\" alt=\"\" class=\"wp-image-6166\" srcset=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-104.png 500w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-104-300x300.png 300w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-104-150x150.png 150w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-104-400x400.png 400w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/wordwall.net\/play\/81742\/488\/439\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-98.png\" alt=\"\" class=\"wp-image-6167\" srcset=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-98.png 500w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-98-300x300.png 300w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-98-150x150.png 150w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-98-400x400.png 400w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Horizons Of Soil Key Notes : 1. What Are Soil Horizons? 2. Major Soil Horizons 3. Formation of Soil Horizons 4. Importance of Soil Horizons 5. Visual Representation A labeled diagram showing the soil profile with layers (O, A, E, B, C, and R) will help students visualize the structure. Let&#8217;s practice!<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"om_disable_all_campaigns":false,"footnotes":""},"class_list":["post-5524","page","type-page","status-publish","hentry","entry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/5524","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/comments?post=5524"}],"version-history":[{"count":14,"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/5524\/revisions"}],"predecessor-version":[{"id":15431,"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/5524\/revisions\/15431"}],"wp:attachment":[{"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/media?parent=5524"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}