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- In which type of soil is nutrient leaching a morecommon problem, sandy or clay soil?RI GİRTEN K Which of the following is not true for Soil Organic Matter (SOM)? O It can be degraded by microbes OIt holds water for plants It is integral to maintaining the soil structure OIt makes up a large proportion of soil structure OIt is important for retaining nutrients in the soilThe practice of crop rotation uses nitrogen fixation to create fertile fields. First, a plant without a nitrogen-fixing relatiorhip, such as corn, is planted. After the harvest, a nitrogen-fixing plant replaces the initial crop. Instead of harvesting the nitrogen-fixing plant, however, it is plowed under. The cycle continues in this manner. Why would nitrogen-fixing plants be plowed under instead of harvested? * To increase water retention. O Nitrogen-fixing plants are not a food crop. To increases usable nitrogen in the soil. To decrease bacteria in the soil.
- Which soil mineral is most likely to be leached away during heavy rain? O hydrogen ion (H+) O Potassium ion (K+) O chloride ion (Cl-) O Calcium ion (Ca2+) O Sodium ion (Na+)Explain two ways that soil can lose nutrients.As a rule of thumb, each 1% of soil organic matter by weight contains about 1,000 pounds of nitrogen in the plow layer. For a plow layer with 2% soil organic matter, one can expect the amount of N to be mineralized per growing season to equal about: over 120 pounds less than 10 pounds 15 pounds 120 pounds 40 pounds
- Fertile soil is one of the keys to good yield. (i) Explain the roles of clay and organic matter in contributing to soil fertility and cation exchange capacity (CEC). (ii) Name ONE (1) negative effect of low CEC and high CEC soils respectively. Suggest ways to improve low CEC and high CEC soils. (iii) Suggest ONE (1) suitable type of crops for high CEC soil, low CEC soil and loam soil respectively.Some of the problems associated with intensive irrigationinclude all of the following except(A) soil salinization.(B) overfertilization.(C) land subsidence.(D) aquifer depletion.Draw the NPK economy by showing how these nutrients are being added and lost in the soil system (Just a simple illustration-Boxes and Arrows with labels/descriptions - is enough to illustrate the soil nutrient economy) Each of the soil nutrient, N-P-K, should have a separate hand-drawings. Thus, there will be three (3) drawings.
