{"id":5520,"date":"2023-02-05T06:01:42","date_gmt":"2023-02-05T06:01:42","guid":{"rendered":"https:\/\/7thclass.deltapublications.in\/?page_id=5520"},"modified":"2024-12-21T06:16:09","modified_gmt":"2024-12-21T06:16:09","slug":"s-21-a-soil","status":"publish","type":"page","link":"https:\/\/7thclass.deltapublications.in\/index.php\/s-21-a-soil\/","title":{"rendered":"S-21.a Soil"},"content":{"rendered":"\n<h2 class=\"wp-block-heading has-text-align-center has-text-color\" style=\"color:#00056d;text-transform:uppercase\"><strong>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 is-resized\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"685\" src=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/10\/person-holding-handfull-of-soil-129288276-5c4018b546e0fb0001ac25a3-1024x685.jpg\" alt=\"\" class=\"wp-image-9466\" style=\"width:413px;height:auto\" srcset=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/10\/person-holding-handfull-of-soil-129288276-5c4018b546e0fb0001ac25a3-1024x685.jpg 1024w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/10\/person-holding-handfull-of-soil-129288276-5c4018b546e0fb0001ac25a3-300x201.jpg 300w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/10\/person-holding-handfull-of-soil-129288276-5c4018b546e0fb0001ac25a3-768x514.jpg 768w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/10\/person-holding-handfull-of-soil-129288276-5c4018b546e0fb0001ac25a3.jpg 1500w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n<h4 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-84615e844cd605e86e0b1376236e6b42\" style=\"color:#000060\">1. <strong>What is Soil?<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>Soil is the uppermost layer of Earth&#8217;s crust that supports plant growth.<\/li>\n\n\n\n<li>It is a natural resource composed of minerals, organic matter, air, and water.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h4 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-20645d2090ef4a85a183d63fe0108c35\" style=\"color:#000060\">2. <strong>Formation of Soil<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>Soil formation is a slow process that occurs over thousands of years.<\/li>\n\n\n\n<li>It begins with the weathering of rocks into smaller particles due to natural agents like wind, water, and temperature changes.<\/li>\n\n\n\n<li>Organic material from decayed plants and animals mixes with these particles to form soil.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h4 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-33b27700aecb2a41ff766b3b58b6bae6\" style=\"color:#000060\">3. <strong>Components of Soil<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>Minerals:<\/strong> Provide essential nutrients for plant growth.<\/li>\n\n\n\n<li><strong>Organic Matter (Humus):<\/strong> Improves fertility and retains moisture.<\/li>\n\n\n\n<li><strong>Air:<\/strong> Helps roots to breathe.<\/li>\n\n\n\n<li><strong>Water:<\/strong> Essential for plant hydration and nutrient absorption.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h4 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-74bbc011a33a9aab7f724d3e3ca5da2c\" style=\"color:#000060\">4. <strong>Types of Soil<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>Sandy Soil:<\/strong> Large particles, low water retention, good drainage.<\/li>\n\n\n\n<li><strong>Clayey Soil:<\/strong> Small particles, retains water, poor drainage.<\/li>\n\n\n\n<li><strong>Loamy Soil:<\/strong> Balanced mixture of sand, silt, and clay; ideal for farming.<\/li>\n\n\n\n<li><strong>Silty Soil:<\/strong> Fine particles, smooth texture, retains water well.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h4 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-1beada22aa4adfa5b421bead10c0ac7f\" style=\"color:#000060\">5. <strong>Soil Horizons (Layers of Soil)<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>O Horizon:<\/strong> Top layer rich in organic matter (humus).<\/li>\n\n\n\n<li><strong>A Horizon (Topsoil):<\/strong> Contains minerals and nutrients; supports plant life.<\/li>\n\n\n\n<li><strong>B Horizon (Subsoil):<\/strong> Rich in minerals leached from the topsoil.<\/li>\n\n\n\n<li><strong>C Horizon:<\/strong> Weathered parent rock.<\/li>\n\n\n\n<li><strong>R Horizon:<\/strong> Unweathered bedrock.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h4 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-c02d9ca48190d853521f4874d0e9d127\" style=\"color:#000060\">6. <strong>Soil Erosion<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>The removal of topsoil by wind, water, or human activities.<\/li>\n\n\n\n<li>Causes: Deforestation, overgrazing, and improper farming.<\/li>\n\n\n\n<li>Preventive Measures: Afforestation, terracing, and crop rotation.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h4 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-bdad0ad1ee27b93143a66d59621cf285\" style=\"color:#000060\">7. <strong>Importance of Soil<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>Supports plant growth and agriculture.<\/li>\n\n\n\n<li>Regulates water flow and stores water.<\/li>\n\n\n\n<li>Provides habitat for microorganisms and insects.<\/li>\n\n\n\n<li>Filters and purifies water.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h4 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-b9a12f9bcb2c31b69f7c813dfb25dace\" style=\"color:#000060\">8. <strong>Soil Conservation<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>Mulching:<\/strong> Covering the soil with organic matter to retain moisture.<\/li>\n\n\n\n<li><strong>Contour Plowing:<\/strong> Plowing along the contour lines to prevent erosion.<\/li>\n\n\n\n<li><strong>Terracing:<\/strong> Building steps on slopes to reduce runoff.<\/li>\n\n\n\n<li><strong>Crop Rotation:<\/strong> Growing different types of crops in succession to maintain soil fertility.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h4 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-25c0cb43846d4ac02d68580ab45dbce2\" style=\"color:#000060\">9. <strong>Soil and Agriculture<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>Soil quality directly impacts crop yield.<\/li>\n\n\n\n<li>Farmers use manure and fertilizers to enrich the soil with nutrients.<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list has-large-font-size\"><\/ol>\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\/82235\/527\/310\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-106.png\" alt=\"\" class=\"wp-image-6173\" srcset=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-106.png 500w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-106-300x300.png 300w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-106-150x150.png 150w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-106-400x400.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\/233\/264\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-100.png\" alt=\"\" class=\"wp-image-6174\" srcset=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-100.png 500w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-100-300x300.png 300w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-100-150x150.png 150w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-100-400x400.png 400w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Soil Key Notes : 1. What is Soil? 2. Formation of Soil 3. Components of Soil 4. Types of Soil 5. Soil Horizons (Layers of Soil) 6. Soil Erosion 7. Importance of Soil 8. Soil Conservation 9. Soil and Agriculture 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-5520","page","type-page","status-publish","hentry","entry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/5520","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=5520"}],"version-history":[{"count":14,"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/5520\/revisions"}],"predecessor-version":[{"id":15426,"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/5520\/revisions\/15426"}],"wp:attachment":[{"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/media?parent=5520"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}