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Published byCatherine Holmes Modified over 9 years ago
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Soil Monitoring and Sampling Must know the objectives why to sample? What to sample for? When to sample? Number of soil sampling? Variability in sampling? From various soil depths – Objectives?
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Soil Monitoring What to sample for? NO 3 -N, pesticides, organic matter, metals, organics, pathogens, micro-organisms, N, P, K, micro-nutrients.
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When to Sample? Once a week, month, or year. As a function of cropping system or season. As a function of weather cycle.
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Number of samples per field – function of cost? Spatial variability. Minimum three samples per plot. Several depths. Composite to cut down cost.
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Soil Sampling Techniques Soil augers Soil probes Back saver Zero contamination tube Hydraulic probes
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Problems During Soil Sampling and Transportation Cross-contamination Separation, collection Storage, transportation, temperature control Timely analyses in lab Laboratory techniques/interpretation
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Quantity Control/Quality Assurance Sending duplicate samples to recognized laboratories Manual on laboratory procedures All steps on how to collect soil samples and lab analyses.
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Water Quality Monitoring Point sources of pollution (manure storage platforms, spills) Non point sources (agriculture)
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Monitoring Needs Surface water Groundwater
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Surface water Monitoring Field runoff Open ditches/drains Irrigation canals Ponds/Lakes/reservoirs Wetlands Streams, rivers (Danube River) Ocean, Sea (Black sea)
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