Lab Report week 2-1

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Apr 3, 2024

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1 Week Two Laboratory: Properties of soil Jonathan Wright SCI 207: Our Dependence Upon the Environment Christin Call January 09, 2024

2 Properties of Soil Introduction The lab is important because it teaches us how agriculture and water availability impact our community. It can also teach us that soil is a dynamic natural body having properties derived from the combined effects of climate and biotic activities. It also teaches us that soil comes in different varieties. Texture is also a key to the % of sand, silt, and clay found in it. Lastly, it teaches us that soil nitrogen, phosphorous, and potash levels are important to help maintain healthy plant life (Delgado, Grinyer, Reich, Singh, & Allen, 2016). The main purpose of this lab was to teach us about how water capacity and agriculture help the soil. For activity one, I predicted that soil sample “A” would be 50% sand, 20% silt, and 30% clay. I made this prediction because the soil sample was collected from an area in my backyard with a large sand pit-type area. For activity two, I predicted that the sand would be the most porous and the clay would be the least, with soil sample “A” in the middle. My reason for this hypothesis was that because the sand is grainy, the water would go through it easily, whereas the clay is denser, so it would take longer for the water to flow through, leaving the soil sample “A” in the middle because it would be a combination of the two types. For activity three, I predicted that soil sample “A” would be more acidic and soil sample “B” would be less acidic. because the sample was taken from an area with less plant growth and sample “B” from an area with more plant growth. For activity four, I predicted that soil sample “B” would have higher levels of nitrogen, phosphorous, and potash because it was taken from an area where a garden used to be,

3 so it was better equipped to support the growth of plants. Your background paragraph should be at least 5-7 sentences, not including any quoted material. In a separate paragraph, state your hypotheses one at a time, in the order of the activities in the lab. Provide at least one hypothesis for each lab activity. For each hypothesis, explain your reasoning behind what you thought would happen. You should have written your hypotheses before you conducted your experiments. Do not provide any results from the lab here – the results go later in your report (see below). Results Data Tables and Observations Copy and paste completed data tables here, in order. Make sure that each table is clearly labeled. Data tables should be for all lab reports except Weeks Three and Four. For Week Three, provide your observations from the lab here. For Week Four, there this section will be blank. Graphs and Photographs Paste your graphs here ( Weeks One and Four only ). Paste your photographs here (Weeks Two, Three, and Five only ), in the order they were taken during the lab. Provide captions for each graph or photograph. Remember that all photos for the labs in Weeks Two, Three, and Five must include a strip of paper with your name and the date clearly written on it. Lab reports without photos will be returned ungraded. For the virtual labs ( Weeks One and Four only ), at least one graph must be included in this section for the lab report to be evaluated. Analysis Based upon the results of each lab activity, explain whether you accepted or rejected each of your hypotheses and why.

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4 In one or more well-written paragraphs: 1) Restate your original hypothesis for the lab activity; 2) Communicate the results of the lab, referring back to specific results from your data tables, photos, graphs, or observations; 3) Compare your hypothesis to your results and decide either to accept your hypothesis or to reject it; 4) State whether you accept your hypothesis or reject it and explain with evidence; 5) Move on to the next hypothesis and repeat these steps. Reminder: this section should be written in paragraph form , not as bulleted or numbered lists. Discussion In your own words, how do the results of this lab relate to the scientific literature and/or to real- world applications? Using a source other than the lab manual or textbook, provide supporting facts or concepts that help you make meaning of the lab results. Cite the source using APA format . Your answer should be at least 5-7 substantive sentences in length, not including any quoted material. In a separate paragraph, what challenges and/or possible mistakes did you experience when completing this lab? Identify at least one. How might those challenges and/or. mistakes have impacted the accuracy of your results? References Delgado-Baquerizo, M., Maestre, F. T., Reich, P. B., Jeffries, T. C., Gaitan, J. J., Encinar, D., ... & Singh, B. K. (2016). Microbial diversity drives multifunctionality in terrestrial ecosystems. Nature communications , 7 (1), 10541. https://ashford.mediaspace.kaltura.com/media/SCI207+THE+SCIENTIFIC+METHOD/ 1_5325onvq

Lab Report week 2-1

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