We’re staying in Ireland for Episode 2 and talking about a research paper that looks at four different pasture types (permanent pasture, perennial ryegrass, a six species mixture and a twelve species mixtures) under grazing. They measured yields, nutritive value and how plant species persisted and it’s all fascinating stuff (it helps, if you keep telling yourself that).

There’s more. Paul cries at a boat. Michael reveals his Joel Williams man-crush. And there’s four jokes.

Here are the links.

First things first; a link to a biograph of Fridtof Nansen. There’s loads of stuff about him on the interweb, but this one also gets you into The Polar Exploration Museum website (where the boat is). https://frammuseum.no/polar-history/explorers/fridtjof-nansen-1861-1930/

The main paper

Shackleton, J., Boland, T.M., Kennedy, J., Grace, C., Beaucarne, G., Kirwan, S.F., Schmidt, O. and Sheridan, H., 2024. Annual and seasonal dry matter production, botanical species composition, and nutritive value of multispecies, permanent pasture, and perennial ryegrass swards managed under grazing. Grass and Forage Science, 79(4), pp.630-650. https://onlinelibrary.wiley.com/doi/full/10.1111/gfs.12691

This is the Dee et al (2023) paper about how diversity (species richness) affects yields in grasslands. It's probably behind a paywall, but essentially they look at previous studies, take confounding factors into account, and integrate the results to get to a conclusion, which is; "Contrary to many prior studies, we estimate that increases in plot-level species richness caused productivity to decline: a 10% increase in richness decreased productivity by 2.4%.”

Dee, L.E., Ferraro, P.J., Severen, C.N., Kimmel, K.A., Borer, E.T., Byrnes, J.E., Clark, A.T., Hautier, Y., Hector, A., Raynaud, X. and Reich, P.B., 2023. Clarifying the effect of biodiversity on productivity in natural ecosystems with longitudinal data and methods for causal inference. Nature Communications, 14(1), p.2607. https://www.nature.com/articles/s41467-023-37194-5

Here’s the Raedts and Langworthy plantain paper. It’s behind a paywall. Sometimes if you Google the title, you can find a free copy on the interweb somewhere. If not, go to the next one.

Raedts, P. and Langworthy, A., 2018. Establishing plantain in spring in existing perennial ryegrass pastures in northern Tasmania. Animal Production Science, 60(1), pp.114-117. https://www.publish.csiro.au/AN/AN18575

This is the open access paper on establishing plantain.

Bryant, R.H., Dodd, M.B., Moorhead, A.J., Edwards, P. and Pinxterhuis, I.J., 2019. Effectiveness of strategies used to establish plantain into existing pastures. Journal of New Zealand Grasslands, pp.131-138.  https://www.nzgajournal.org.nz/index.php/JoNZG/article/view/406/63

Episode 1 dives into the science with an Irish research paper that looks at the yields of multi species pastures (along with the various different plant species that go into them) at several levels of Nitrogen (including zero). Which grasses work best in different systems? Why bother with Plantain and Chicory? Which plants drive yield? 

There's some chat about ewes and Red Clover and there's a smell under the table.

Link to the main paper Moloney et al, 2020.  http://archive.sciendo.com/IJAFR/ijafr.2020.59.issue-1/ijafr-2020-0002/ijafr-2020-0002.pdf

Links to the other two Moloney papers in the trilogy. https://www.jstor.org/stable/27041764?seq=1 and https://www.jstor.org/stable/27041763

Link to the Egan et al 2025 paper on plantain hoovering up nitrate in the soil. This may be partially behind a paywall, but the key bits are available.  https://www.sciencedirect.com/science/article/abs/pii/S0167880924004948

Link to Mustonen et al 2014 which is the study on the effects of feeding red clover silage to ewes https://www.sciencedirect.com/science/article/pii/S175173111400161X?via%3Dihub

Link to the Innovative Farmers trial on ewes and red clover. https://www.innovativefarmers.org/media/l00oqr1t/mating-sheep-on-red-clover-final-report.pdf

Link to an early UK study into red clover and ewe fertility; Newton and Betts 1973. Still behind a pay wall, but you can see the abstract without paying.   https://www.cambridge.org/core/journals/journal-of-agricultural-science/article/abs/effects-of-red-clover-trifolium-pratense-var-redhead-white-clover-trifolium-repens-var-s-100-or-perennial-ryegrass-lolium-perenne-var-s-23-on-the-reproductive-performance-of-sheep/DBE300E13E0D8D81BF0B6D00ED9B3E90

Link to a review paper/report not mentioned in the podcast which is Marley et al 2011. This is an IBERS report. https://projectblue.blob.core.windows.net/media/Default/Research%20Papers/Beef%20&%20Lamb/effects_of_legumes_on_ewe_and_cow_fertility_review_-_final_report_20jul11.pdf

Michael and Paul introduce themselves and explain why the world needs yet another farming podcast (it's a science podcast). There's bits about their farms, the other stuff they do and how science works and, for no obvious reason, a foray into the world of arbuscular mycorrhizal fungi.   

Here's the link to Frank B. 1885.  https://link.springer.com/article/10.1007/s00572-004-0329-y

Link to the original wood wide web paper https://www.nature.com/articles/s41559-023-01986-1 and the recent paper that says more research is needed  https://www.nature.com/articles/s41559-023-01986-1

These two might be behind a pay wall, so here's a link to a recent review of the ecological functioning of mycorrhizal networks that is definately open access. https://besjournals.onlinelibrary.wiley.com/doi/full/10.1111/1365-2435.70063