How to take soil samples from a standing crop.
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For advisory samples, to be analyzed for soil fertility status and soil health (salinity/sodicity) Spade can be used for collection of composite sample of depths 0f 0-15 and 15-30 cm. But this is only for general purpose sampling just for estimation of soil fertility and soil health status for crop productivity. However, for research purpose, you have to use specific sampling tools devised for specific sampling. Hope it may help you
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