improve soil – GrowIt BuildIT

Knowing the amounts of clay, silt, and sand that make up your garden soil can help you understand how to maximize your garden production [1]. The proportions of sand, clay, and silt have a direct effect on nutrient retention and microbial populations [2]. I'm about to show you a simple test that you can perform, step by step with pictures, so you can determine exactly what kind of soil you have. To test soil texture using a mason jar, start by filling the jar 1/3 of the way full of well-sifted soil. Add water to almost the top of the jar and some dish soap. Then shake the mixture up. As the soil/water mixture settles over 48-72 hours the sand, silt, and clay will separate forming horizons. Then their proportions can then be determined. *Note - if you are just getting started as to where to make a garden, there is a quicker, but less precise method to test your soil texture. The soil ribbon test is a quick and dirty (haha!) test to let you know roughly where the soil texture falls on the USDA Soil Pyramid. And knowing what soil you have is critical to determine if the location is suitable for building a vegetable garden. Steps to conduct the 'jar test' for soil texture 1 - Gather Materials Obtain the following materials before starting. You will need a glass jar with straight sides, a ruler, black marker, and granular dish washer detergent. And, dig your soil. For digging your soil, ensure you take a cross section of at least six inches depth (15 cm). Don't just scrape the surface, as you want to get a complete picture of your soil. *Special NOTE - This is a great time to perform a SOIL DRAINAGE test! You can have both tests happen concurrently, thereby learning even more about your garden soil! See our step by step guide to test your soil drainage here! 2 - Sift the soil Place a kitchen strainer or sieve over a bucket and push the soil through. This will help break up the particles and remove any larger rocks or roots and other organic matter. I have to tell you that this is a crucial step to obtain a good mixture! The first time I ever performed this step I did not sift the soil. Even after several minutes of shaking the jar I still had solid balls of clay/silt. So, to get accurate results take the time to sift the soil! 3 - Add soil, water, and detergent to jar Fill the glass jar to approximately 1/3 full with the finely sifted soil. Add 1 tablespoon of granular dishwashing detergent. Then fill the jar with water to almost the top, leaving a gap. 4 - Shake the jar Secure the lid to the jar tightly. Then shake up the mixture until the mixture becomes uniform and slimey. Then set the jar on a flat surface to rest 5 - Mark the Sand Layer After the mixture has set for one minute, mark the side of the jar with a black marker. This represents the sand component. 6 - Mark the silt layer After the mixture has set for two hours, mark the side of the jar. This represents the silt layer. 7 - Mark the clay layer After the mixture has set for 2-3 days and the water is clear, mark the final layer. This is the clay layer. Interestingly enough the soil sample on the right has no identifiable clay layer. Even though it was taken only about 15 feet away from the sample on the left. Also note the difference in sand particle size...... 8 - Determine the amounts of sand, silt, and clay. Use your ruler to determine the total height of soil. But also record the individual heights of each layer. Then, to calculate the proportions (percentages) of sand, silt, and clay use the formulas below. Additionally, I would like to point out that the 'total' height of mixture is the same as the clay layer. % Sand = (height of sand) / (total height of mixture) % Silt = [ (height of silt) - (height of sand) ] / (total height of mixture) % Clay = 1 - %Sand - %Silt So, in my example from my garden, I had a the following values LayerHeightClay68 mmSilt63 mmSand43 mm Example Soil Texture Calculation Applying these formulas would yield the following results %Sand = 43 mm / 68 mm = 63% %Silt = (63 - 43) / 68 mm = 20 / 68 = 29% % Clay = 100% - 63% - 29% = 8% 9 - Determine the soil type using the pyramid from the USDA (Link below). You can use the USDA soil texture calculator [3] to determine your exact soil classification. Video Demonstration of the Mason Jar Soil Test https://youtu.be/77kQPIx-sIQ What does Soil Texture mean? Your soil is made up of 3 inorganic components, sand, silt, and clay. Knowing the proportions of each component can greatly aid you in optimizing your soil for vegetable production or adding amendments. Any combination of these three elements that falls into the 'loam' category is considered a good base for a successful garden. But, now I will speak on the individual components and how they behave individually. Sand Sand is the largest particle size for soil components (0.10 to 2.0 mm). Pure sand will drain water and not hold nutrients. Just think of how little plant life you find on a beach! Sandy soil will be prone to drought and hold little in the way of nutrients. Silt The next smallest soil particles are considered silt, and are between 0.002-0.05 mm diameter. Silt is generally silica, rock or some other small inorganic particle. Silt will hold nutrients and water quite well, but still drain. Clay Clay is the smallest of soil particle sizes, coming in at anything less than 0.002 mm. Clay will compact quite easily and prevent water drainage. On the flip side though, it holds water and nutrients quite well. Next Steps Now that you have determined your soil texture, you can address any drainage problems that you may have. If your soil falls within the "loam" classification you probably do not need to take any action, as long as your soil drains well. And loam generally allows for good root penetration deep into the soil. But if you have 'sandy' soil, you can add organic matter such as compost or hummus so that it retains water better. Mixture of composted material and worm castings. Nearly 100% broken down. If you have clay soil, you can also add organic matter like compost as it will break up clay particles and reduce compaction. This will greatly improve the ease in digging your soil as well as drainage. *Want to see the best guide for making a compost pile? Click on the link below and have a look at the video embedded. It shows the complete breakdown of a pile in the simplest manner possible. https://growitbuildit.com/how-to-make-a-compost-pile/ One of my favorite ways to add organic matter is to apply a heavy mulch of leaves or straw in the fall. Did you know that leaves contain all essential the nutrients your garden needs! By doing this worms will eat the leaves, and as they travel down into your soil eject worm castings. So, they will aerate your soil and fertilize it at the same time! They get food, and you are now able to grow more food - that is what you call a Win/ Win!