Basic experimental designs for field soil dissipation studies

4 Basic experimental designs for field soil dissipation studies 

At this stage in planning, the essential study design information listed below should be determined and a written study plan (i.e., protocol) including these key study details prepared. A formal, pre-approved study plan is required for field soil dissipation studies conducted under Good Laboratory Practice (GLP). A written study plan for non-GLP studies is highly recommended since the document serves as valuable guidance for study personnel. 

Number and locations of test sites and required soil properties Cropped vs bare-soil surface Small vs large plot Application type 

Use pattern and study purpose Test material availability Relevant use pattern and physical formulation Relevant use pattern 

Anticipated persistence and mobility of agrochemical and degradates Anticipated variability in soil residues and cost constraints Depends upon specific analytical procedures (and associated LOQ) and available sample storage and processing capabilities Necessary for most dryland and irrigated cropping scenarios 

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