How long does it take to get the results for the various tests?

Depends on soil type and weather. You need to collect soil and let it dry (so eg it will take a bit longer in wet winter months), then mix it with water and let it settle (heavy soils will settle faster), then do the test (1-2 minutes to react). The first step takes the longest (could be a couple of days), the second is in terms of hours.

Is there a manual for this?

Yes, the cardboard sleeve inside has instructions and there are plenty of video tutorials on YouTube if you're still unsure.

Bought this test kit and the pH is good but i am not getting any sort of reading for the other tests, just the colour of murky water, advise please?

As my original review reported, I was primarily interested in the potash test but the results I achieved were rather indefinite. However I don't think they were obscured by murky water. Did you prepare the sample as described and leave it sufficiently long for the soil residue to settle?

Product Dimensions	12.7 x 12.7 x 15.01 cm; 113.4 g
Part number	Luster Leaf - 1601
Item display height	8.5 inches
Item display length	1.3 inches
Item display width	9.1 inches
Item display weight	454 g
Material type	Plastic
Power source type	Manual
Department	mens
Manufacturer	Luster Leaf
Item model number	1601
ASIN	B0000DI845

Luster Leaf 1601 Rapitest Test Kit for Soil pH, Nitrogen, Phosphorous and Potash, 1 Pack

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