# 1 volume of water added to the soil 35 ml 2 calculate

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1. Volume of water added to the soil: 35 mL 2. Calculate porosity as the percent of pore space compared to the volume of dry soil. Show your work (just answer). 30% SOIL TEXTURE LAB
Soil is made of mineral particles belonging to three size categories: clay, silt, and sand. The size of soil particles is important. Large particles of sand allow empty space for air and water to enter the soil. Smaller silt and clay particles help hold the water in a soil so that it does not drain away too quickly to be of use to plants. The ratios of these materials, or texture , can be determined qualitatively and quantitatively. Step 1 is used to qualitatively determine the soil texture while steps 2-5 are used to determine the texture quantitatively. 1. Determine the soil type using the Soil Texture by Feel Chart. (Soil Texture by Feel Chart is attached.) Soil Sample = ___sandy loam ____________________ 2. In the previously prepared graduated cylinder, three distinct layers should have settled out of suspension. (Use the graduated cylinder with your soil sample prepared on a previous day.) 3. Measure the volume of each layer and record in the table below. 4. Calculate the percentage of each layer using the following equation Volume of layer x 100 = % of sand, silt, or clay Total volume of soil 5. Use the Soil Texture Pyramid to identify the type of soil in your sample. (Soil Pyramid is above in the pre lab.) Soil Sample = Silt Loam Table 1 Soil texture volume % Sand 0 0 Silt 21 95.5 Clay 1 4.5 Total 22 100 POST LAB QUESTIONS
1.What is the relationship between soil texture and water?
3. Give two techniques to decrease soil erosion.
4.Which soil texture is more subject to erosion?
5. List the 6 most important soil nutrients in order of their importance.
6. Do you have a limiting nutrient for plant growth in your soil sample? If so what is it?
7. Which soil type is best for agriculture – name and characteristics?
8. What crops could you grow in your soil based on your soil’s pH?
9. How would precipitation or irrigation affect the nutrients found in your soil?