CCC S1E13 with John McDonald-Wharry
Char Chit Chat30 Elo 2025

CCC S1E13 with John McDonald-Wharry

John is a researcher and academic so it was great to hear his perspective and explanations of biochar knowledge that he has gained from doing a PhD tackling 3 aspects of biochar; investigating how biochar changes on a molecular level at different carbonisation temperatures, quality testing protocol development, and composite materials innovation.

Ket takeaways for me:
1. Higher temperature pyrolysis (600-800 degrees C) gives higher surface area biochar which is better for soil.
2. Biology influences biochar on the microscale and chemistry influences biochar on the nanoscale.
3. Higher temperature pyrolysis (above 620 degrees C) gives biochar that is electrically conductive (for use in EMF blocking composites)

John is now a free lance consultant helping people and companies in biochar production development and improvement. He also has been a BNNZ committee member since its inception and offers his scientific knowledge to the organisation free of charge.

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Jaksot(35)

CCC S2E15 with Toula Finlayson (Southland Carbon)

CCC S2E15 with Toula Finlayson (Southland Carbon)

Toula from Southland Carbon joined me for a chat this week about her journey of biochar discovery to being the largest commercial producer in NZ. Toula and partner Andrew set up the facility in the ol...

27 Syys 28min

CCC S2E14 with Kevin Rapson (Buzi-B Flower Farm)

CCC S2E14 with Kevin Rapson (Buzi-B Flower Farm)

Episode 14 was a fun chat with Kevin Rapson from Buzi-B Flower Farm. We chat about how he has used biochar to improve his and his wife Trish's soil for growing flowers commercially on their small hold...

23 Syys 34min

CCC S2E13 with Amanda Currie (Tinwald Farm)

CCC S2E13 with Amanda Currie (Tinwald Farm)

Episode 13 of the Char Chit Chat with Amanda from Tinwald Farm covered a lot of cool stuff. I feel like more women are needed in the world to run farms so that they become way more connected with the ...

22 Elo 58min

CCC S2E12 with Greg Hart (Mangarara Farm)

CCC S2E12 with Greg Hart (Mangarara Farm)

Episode 12 features well known regenerative farmer Greg Hart from Mangarara Farm in the Hawkes Bay region. Dylan has known about Greg and his tree planting for many years and met Greg at the Undergrou...

27 Heinä 36min

CCC S2E11 with Shakēd From

CCC S2E11 with Shakēd From

Shakēd is involved in a large variety of endeavours and we talk about these for awhile before biochar comes up, but hopefully you will still find it all interesting!We chat about a 3 year black soldie...

18 Heinä 45min

CCC S2E10 with Phil Stevens (Slow Farm)

CCC S2E10 with Phil Stevens (Slow Farm)

Dylan's first face to face podcast with an update from Phil in Ashhurst about what he is up to (S1E2 here). We had just returned from Hamilton with John after Fieldays 2026 and I was spending two days...

20 Kesä 14min

CCC S2E9 with Lydia Thomsen (Pickled Compost)

CCC S2E9 with Lydia Thomsen (Pickled Compost)

Episode 9 with Lydia from the Wairarapa covers the relationship between soil health, plant nutrition, and human health. Lydia is a qualified nutritionist on a mission to pickle household food scraps u...

26 Touko 42min

CCC S2E8 with John Valentine

CCC S2E8 with John Valentine

Episode 8 with John explores his recent discovery of biochar for his compost and his method of making it in a stainless steel bucket. This takes some work to do, but in a social context such as hangin...

14 Touko 30min

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