concept of soil quality & soil health.pptx

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1. Banda university of agriculture & technology , banda problematic soils & their management TOPIC- CONCEPT of soil quality & soil health presented BY – PRESENTED TO - Dr. deo kumar 2111 , 2112 , 2113 , 2114 , 2115

2. Soil health - Definition – The continued capacity of the soil to function as a vital living ecosystem that sustains plants, animals and human .

3. Soil quality - According to Doran & Parkin , In 1949 Defined soil quality as “ the capacity of a soil to function , within ecosystem boundaries , to sustain productivity , maintain environment quality , and promote plant and animal health .”

4. Soils are the storehouses for water and nutrients. Plants draw on these stores as needed to produce roots, stems, leaves, and, eventually, food and fiber for human consumption. The soil matrix is the major incubation chamber for the decomposition of organic wastes, for example, pesticides, sewage, and solid wastes. The reason that soil quality matters is that healthy soil can store and process more water. Poor quality, depleted soil, won't hold water and will make it impossible for your plants to thrive and survive. Importance of soil quality-

5. 1. INHERENT SOIL QUALITY – Inherent soil quality refers to the aspects of soil quality relating to a soil ‘s natural composition and properties influenced by the natural long term factors and processes of soil formation . These generally can not be influenced by human management . Soil quality includes both inherent and dynamic quality . Types of soil quality

6. 2 . Dynamic soil quality - It is equivalent to soil health , refers to soil properties that change as a result of soil use and management over the human time scale . The term ‘ soil health ’ has been generally preferred by farmers , while scientists have generally preferred ‘ soil quality ’.

7. Climate Time Living Organism Topography Parent Material Factors affecting soil quality -

8. Soil Quality parameters Physical Factor • Soil depth & Water Holding Capacity • Physical environment- Structure, Aeration, Drainage, Texture, Density • Soil Erosion- Water and Wind Erosion Chemical Factors Nutrient Availability- Capacity & Intensity Factor • Soil Reaction- Acidic, Saline, Sodic Soil • Presence of toxic elements • Ion Exchange Phenomena(CEC & AEC) Biological Factors Microorganisms present and their interaction among themselves • Earth worms activities • Soil Enzyme Activity • Organic Matter content

9. Characteristics of healthy soil - 1 . Good soil tilth – Soil tilth refers to the over all physical character of soil in the context of its suitability for crop production . 2 . Sufficient depth – It refers to the extent of soil profile through which roots are able to grow to find water and nutrients . 3 . Good water storage & Good Drainage – During a heavy rain , a healthy soil will take in and store more water in medium and small pores but will also drain water more rapidly from large pores . 4 . Low weed Pressure – Weed pressure is a major constraint in crop production . weeds compete with crops for water and nutrients that are essential for plant growth .

10. Soil quality index-