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Understanding Soil Moisture and Water Conditions for Plant Growth

Learn about soil moisture conditions like saturation, wilting point, and field capacity. Discover the impact of too wet or dry soil on plant growth and the importance of finding the ideal balance. Get insights into waterlogging issues, root development, and water holding capacity in different soil types. Understand the significance of water intake rates and the concepts of field capacity and wilting point for maintaining healthy plants.

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Understanding Soil Moisture and Water Conditions for Plant Growth

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  1. Soil Moisture Conditions Saturation Field Capacity Wilting Point Too Wet Ideal Too Dry No air space. Balance between No available air - water - soil. water.

  2. Waterlogging No root development Water-logged soil Ground line Normal root zone

  3. Water Holding Capacity (WHC) Coarse Textured Soil Fine Textured Soil High WHC Low WHC The larger the soil particle size, the lower the water holding capacity.

  4. Water Intake Rate Coarse Soil Fine Soil High Water-Intake Rate Low Water-Intake Rate Generally, the larger the soil particle size, the faster the water intake rate.

  5. Field Capacity • When all of the excess water has drained from the soil it is said to be at Field Capacity (FC).

  6. The point at which soil moisture is so low that plants can no longer pull water from it. Plants will die unless watered immediately. Wilting Point

  7. The point at which the plant has lost so much water that it will not revive even if watered immediately. Permanent Wilting Point

  8. The water which is available to the plants. AW is found by subtracting the wilting point measurement from the field capacity measurement. AW = FC - WP Available Water (AW)

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