Fig. 7

Biplot of principle component analysis (PCA) showing the influence of non-amended soil (NAS), biochar amended soil (BAS), vermicompost amended soil (VCAS) and activated biochar amended soil (ABAS) on chlorophyll a, chlorophyll b, total chlorophyll content (Chl. a, Chl b, T Chl cont), carotenoid content (Caro cont), membrane stability index (MSI), relative water content (RWC), sugar content (sugar Cont), proline content (Pro Cont), malondialdehyde content (MDA Cont), photosynthetic rate (A), sub-stomatal CO2 (Ci), stomatal conductance (gs), transpiration rate (E), water use efficiency (WUE), protein content (prot Cont), superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), shoot length (SL), shoot fresh and dry weight (SFW and SDW), root length (R Len), root fresh and dry weight (RFW and RDW), number of leaves (NL), leaf area (LA), leaf fresh and leaf dry weight (LFW and LDW), area of stomata (S Ar), stomatal aperture (SA), area of guard cell (AGC), stomatal index (SI), seed per spikelet (SPS), and thousand seed weight (TSW) of wheat plants grown under 80% and 50% moisture (M) of field capacity (FC).