ACROSS
3. Total quantity of living material in an area (7) 8. Food made from milk curd coagulated by rennet (6) 9. The pin-tailed ______ is a bird of the Vidua genus found mostly in sub-Saharan Africa (6) 10. Principal supporter of a new system or cause 11. The rotary _____ is a tractordrawn apparatus with blades for extracting weeds and turning and levelling soil (6) 12. Make thoroughly wet (6) 13. A species of wild flower, Rosa canina (3,4) 15. Troublesome insects and animals (5) 18. The _____ Rex is a short-haired breed of cat originating in south-west England (5) 21. Pig's foot (7) 23. Small variety of orange originally from China (8) 24. Becoming ready for harvest (8) 26. Receive something as an heir (7) 27. Cause eggs to rot (5) 30. Ancient rock city in Jordan (5) 33. Fortified wine from a Portuguese Atlantic island (7) 35. A legume (Vigna unguiculata) indigenous to sub-Saharan Africa used as food and fodder (6) 36. Alternative name for the go-away-bird (6) 37. Italian dish of small pasta parcels with savoury fillings (7) 38. Full of veins (6) 39. Plant that lives only for a year (6) 40. The reins of a draught animal (7)
