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9 - Fertilizer Elements in the Environment

9 - Fertilizer Elements in the Environment - Fertilizer...

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Fertilizer Elements in the Environment
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Fertilizer Elements in the Environment Concern about N and P in environment, particularly in water Nontarget effects Pollution
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Fertilizer Elements in the Environment Concern about N and P in environment, particularly in water Nontarget effects Pollution Regulated
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Fertilizer Elements in the Environment CROP Runoff Leaching Groundwater Lake
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Fertilizer Elements in the Environment CROP Runoff Leaching Groundwater Lake P N P N
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N Losses – through leaching and erosion (particularly NO 3 - ) Increasing over time in rivers and groundwater (e.g., Tivy, Table 15.4) Effects can be seasonal (highest in winter due to low uptake from plants) Nitrate problems more likely in shallow soils; shallow wells more likely contaminated than deep wells
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Problems with N in water Wasted N and $ going to wrong site Contributor to eutrophication Problems in drinking water (EPA standards: 10 mg/L of nitrate N)
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Leaching of N depends on: Type of N applied Soil type Soil depth (distance to water table) Amount of N applied Time when N is applied Rainfall Cattle or other animals Etc.
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