Standard Operating Procedures (SOPs)

Standard Operating Procedures:

All operations at Soil-Plant Spectral Diagnostics Laboratory of World Agroforestry Centre (ICRAF) are guided by the Standard Operating Procedures (SOPs) developed in line with ISO procedures and practices. The purpose of SOPs is to make sure that each task in the laboratory is carried out the same way each time it is carried out by clearly defining and documenting the procedures and processes that are to be used to complete the task.

The SOPs are therefore task specific documents and describe clearly all actions that are required to complete the task clearly, concisely and completely and help in achieving and maintaining high levels of accuracy and repeatability of experimental results regardless of changes in personnel or equipment or other operating conditions used.

The development of SOPs is a continuous process to make sure that they integrate new aspects of analysis, change in equipment and other aspects such as changes in regulatory, technical or organisational requirements.

The following are the SOPs currently in use:

Method for analysing soil and plant samples for total Carbon and Nitrogen

Method for analysing soil samples for organic carbon and Nitrogen

Method for Determination of Atterberg limits and linear shrinkage in soils

Method for analysing soil samples for soil moisture characteristics

Method for analysing soil samples for particle size distribution using Laser Diffraction

Method for analysing samples for spectral characteristics in Mid IR range using Alpha

Method for analysing samples for spectral characteristics in Mid IR range using HTS-XT

Method for analysing samples for spectral characteristics in Mid IR range using MPA

Method for analysing samples for spectral characteristics in Mid IR range using ASD

Method for analyzing soil samples for mineral composition using XRD

Method for analysing soil, plant and liquid samples for total elements using XRF analysis

Method for analysing soil and fertilizer samples for total elements and mineral composition using HHXRF analysis

Method for analyzing soil clay fraction samples for mineral composition using XRD

Method for analyzing soil samples for Volume fraction

Method for analysing soil pH in water