Rice Study Guide Exam 2

Rice Study Guide Exam 2 - What to know for Exam II SOILS...

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What to know for Exam II SOILS AND LANDSCAPES --Rice is grown from 40 degrees south latitude to 53 degrees north latitude on every continent except Antarctica and from sea level to 8,600 feet in the mountains. --grown on sands to clays and all soil orders. --from pH 3 to 10 --organic matter content 1 to 80% --good to poor drainage --nutrient availabilities from acute to surplus --flood with a few inches to 20 feet --grown upland or dryland --In the US rice is grown on Alfisols 50%, inceptisols 35% southern US, vertisols 11%, mollisols 8%. --Saline Soils --sodic soils --nonsodic alkaline or high pH soils greater than 6.5 --Histosols --Acid sulfate soils --graded or precision leveled soils SOIL FERTILITY AND DIAGNOSIS AND TROUBLE SHOOTING N FORMS < TRANSFORMATIONS < AND LOSS MECHANISMS --Ammonium, nitrate are slats that the plants take up --ammonia and dinitrogen are gasses, and organic matter N --Nitrification—ammonium _>nitrate and must have oxygen present, no flood, takes a few day to a week. Nitrate can be fleeting. --Mineralization—organic N_>ammonium carried out by soil microbes 60-120
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Rice Study Guide Exam 2 - What to know for Exam II SOILS...

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