SOIL 2124 Laboratory Final, Lab Reports of Agricultural engineering

Download SOIL 2124 Laboratory Final and more Lab Reports Agricultural engineering in PDF only on Docsity! Name: SOIL 2124 Laboratory Final 5 December 2000 Each question is worth 4 points unless otherwise designated. The following four (4) questions require you to go to the stations located at the back of the room. 1) Identify this piece of equipment? 2) What is the depth and color of the A and B horizon of this monolith? 3) This rock is used to change the pH of the soil. What kind of plant nutrients can also be supplied? 4) What is the texture of this soil? 5) What is the pH of a soil with a H+ ion concentration of 0.0001087 mol/L? pH ______________ 6) Why would it be important for a farmer to be aware of the types of minerals present in his field? 7) Which causes more erosion: raindrops or runoff water? Why? 8) How many sub-samples should you collect from a uniform 20 ha (50A) field for fertilizer analysis? 9) If is bulk density decreased, what happens to pore volume? SOIL 2124 Laboratory Final 5 December 2000 pg.2 10) You just inherited a farm in North Dakota from your great-great uncle Mo. Because you don’t want to brave the cold Dakota winters you decide to sell the farm for $1,400 per acre and with the profits buy yourself a new truck. The following is the legal description for your farm: SW ¼, SW 1/2 , NE ¼ of Section 26 McMurrin Township, Black Lake, North Dakota. The truck you want costs $22,000. Did you earn enough money selling your farm to buy the truck of your dreams? If no, how much money are you short? If yes, how much money do you have left over after buying the truck for Christmas presents? 11) Using the Soil Survey of Tulsa County, answer the following: Would the Shidler soil be a good soil for placement of a septic tank absorption field? Why or why not? What soil textures can be found in the Severn series? On what map sheet (aerial photo) is the town of Leonard located? 12) What is the predicted soil erosion (A) for a field that is in continuous conventional corn production with residue left on the surface? This field is located in Cimarron Co. OK. on a Woodward soil that has a 4% slope and a length of 90 m. The producer has contour strip cropped it in the past. 13) Determine the textural class of a soil containing 30% silt and 10% clay using the textural triangle. 14) Billy is the unluckiest guy around. Last spring a tornado ripped through his farm, and although his house and barn suffered no damage, the tornado dropped his neighbor’s Buick upside down in his garden smashing his prize-winning tomatoes. His neighbor came and retrieved his mangled Buick, but the car left a huge indentation in Billy’s garden. Billy knows how important soil pores are for water and air movement in the soil and he knows that a soil bulk density over 1.65 g/cm3 can impede plant growth. Billy calls you up to help him assess the damage to his garden. Billy removes a core of soil from his garden that is 2.5 cm in diameter and 20 cm long and places it in the oven to dry. The soil has a wet weight of 217.83 g and a dry weight of 168.86 g. Calculate the bulk density and the percent pore space of the Buick dented garden (assume a particle density of 2.65 g/cm3). Based on this information, will Billy be able to grow tomatoes in his garden? If not, what could Billy do to improve his garden and help his tomatoes grow?