Edit README.md

assays/RelativeWaterContent/README.md

-Leaf relative water content
+#### Leaf relative water content
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+
+
+- An approximately 1 cm 3 section of leaf was sampled from each plot
+and transferred to a pre-weighed Eppendorf tube. 
+
+- The tubes were then reweighed, filled with MilliQ water
+and left at 4 °C overnight. 
+
+- The following morning, the turgid leaf section was removed from the tube, carefully dried with a paper towel and reweighed. 
+
+- Samples were then placed back into the emptied
+Eppendorf tubes and placed in an oven at approximately 70 °C overnight. 
+
+- Once leaf sections were completely
+dry, the tubes containing the leaf samples were reweighed. 
+
+
+- The empty tube weight was subtracted from the
+fresh weight and dried weight measurements and relative water content (RWC, %) was calculated using the
+equation:
+
+$$RWC = \frac{fresh weight - dry weight}{turgid weight - dry weight} ~x ~100 $$ 
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