{"id":3871,"date":"2023-01-09T10:43:11","date_gmt":"2023-01-09T10:43:11","guid":{"rendered":"https:\/\/7thclass.deltapublications.in\/?page_id=3871"},"modified":"2024-12-12T05:38:30","modified_gmt":"2024-12-12T05:38:30","slug":"s-9-b-soil-profile","status":"publish","type":"page","link":"https:\/\/7thclass.deltapublications.in\/index.php\/s-9-b-soil-profile\/","title":{"rendered":"S-9.b Soil Profile"},"content":{"rendered":"\n<h2 class=\"wp-block-heading has-text-align-center has-text-color\" style=\"color:#00056d;text-transform:uppercase\"><strong>Soil Profile<\/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\/12\/Soil-Horizons-Layers-Diagram-Chart.jpg\" alt=\"\" class=\"wp-image-10544\" style=\"width:456px;height:auto\" srcset=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/12\/Soil-Horizons-Layers-Diagram-Chart.jpg 800w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/12\/Soil-Horizons-Layers-Diagram-Chart-300x256.jpg 300w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/12\/Soil-Horizons-Layers-Diagram-Chart-768x655.jpg 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-9c2e7722aef7f9173031e09417d75f8b\" style=\"color:#000060\">1. <strong>Definition of Soil Profile:<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>A <strong>soil profile<\/strong> is a vertical section of soil that shows all the different layers of the soil beneath the surface.<\/li>\n\n\n\n<li>It gives an idea of the composition and structure of the soil at various depths.<\/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-0dd039e5ebab965b3f832619e849b243\" style=\"color:#000060\">2. <strong>Layers of the Soil Profile:<\/strong><\/h3>\n\n\n\n<p class=\"has-large-font-size\">The soil profile consists of several layers called horizons. The main horizons are:<\/p>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>O Horizon (Organic Layer):<\/strong>\n<ul class=\"wp-block-list\">\n<li>Topmost layer, made up of decomposed leaves, plants, and animals (humus).<\/li>\n\n\n\n<li>It is rich in organic material and nutrients.<\/li>\n\n\n\n<li>It is dark in color.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>A Horizon (Topsoil):<\/strong>\n<ul class=\"wp-block-list\">\n<li>The topsoil layer is a mix of organic matter and minerals.<\/li>\n\n\n\n<li>It is the most fertile layer and supports plant growth.<\/li>\n\n\n\n<li>Contains roots of plants and organisms like earthworms and insects.<\/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 (washed down) from the upper layers.<\/li>\n\n\n\n<li>Has less organic material compared to the topsoil.<\/li>\n\n\n\n<li>It is denser and harder and contains clay, iron, and aluminum.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>C Horizon (Parent Material):<\/strong>\n<ul class=\"wp-block-list\">\n<li>Composed of weathered rock and minerals.<\/li>\n\n\n\n<li>Acts as a source of soil minerals.<\/li>\n\n\n\n<li>It is often very rocky and contains fragments of rocks that have broken down over time.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>R Horizon (Bedrock):<\/strong>\n<ul class=\"wp-block-list\">\n<li>The deepest layer made up of unweathered rock.<\/li>\n\n\n\n<li>It is not considered part of the soil but is the foundation from which the soil forms.<\/li>\n<\/ul>\n<\/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-a5a2663cd2d224ff568c6ecdcb4e8efd\" style=\"color:#000060\">3. <strong>Importance of Soil Profile:<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>Soil Fertility:<\/strong> The topsoil (A Horizon) is essential for growing plants because of its high nutrient content.<\/li>\n\n\n\n<li><strong>Water Retention:<\/strong> Different layers of soil have varying abilities to retain water, affecting plant growth.<\/li>\n\n\n\n<li><strong>Soil Formation:<\/strong> The soil profile helps understand how soil forms and changes over time due to weathering and erosion.<\/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-a405d70d586b847f5844cac1c640c432\" style=\"color:#000060\">4. <strong>Factors Affecting Soil Profile:<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>Climate:<\/strong> The type of climate (wet, dry, hot, or cold) influences the soil&#8217;s composition and depth of each layer.<\/li>\n\n\n\n<li><strong>Parent Material:<\/strong> The type of rocks in the area affects the mineral content of the soil.<\/li>\n\n\n\n<li><strong>Living Organisms:<\/strong> Plants, animals, and microorganisms help in the formation and breakdown of organic matter.<\/li>\n\n\n\n<li><strong>Topography:<\/strong> The shape of the land can influence how water flows and how soil layers develop.<\/li>\n\n\n\n<li><strong>Time:<\/strong> Soil profiles evolve over time, and changes in the environment can alter the 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-17999cae44c7a995df208c96ea111339\" style=\"color:#000060\">5. <strong>Soil Erosion and Conservation:<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>Over time, human activity and natural forces can lead to soil erosion, especially if the protective layers like the O and A horizons are lost.<\/li>\n\n\n\n<li>Conservation practices like planting cover crops and reducing deforestation help protect soil profiles.<\/li>\n<\/ul>\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\/81733\/936\/157\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-43.png\" alt=\"\" class=\"wp-image-5970\" srcset=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-43.png 500w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-43-300x300.png 300w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-43-150x150.png 150w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-43-400x400.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\/81671\/124\/944\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-38.png\" alt=\"\" class=\"wp-image-5972\" srcset=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-38.png 500w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-38-300x300.png 300w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-38-150x150.png 150w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-38-400x400.png 400w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Soil Profile Key Notes : 1. Definition of Soil Profile: 2. Layers of the Soil Profile: The soil profile consists of several layers called horizons. The main horizons are: 3. Importance of Soil Profile: 4. Factors Affecting Soil Profile: 5. Soil Erosion and Conservation: 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-3871","page","type-page","status-publish","hentry","entry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3871","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=3871"}],"version-history":[{"count":15,"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3871\/revisions"}],"predecessor-version":[{"id":15255,"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3871\/revisions\/15255"}],"wp:attachment":[{"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/media?parent=3871"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}