I am trying to interpret foliar analyses of sugar maple tree and seedlings using Diagnosis and Recommendation Integrated System (DRIS) approach. To do this you compare observed:optimal ratios of foliar nutrients. I am looking for literature on optimal ratios for sugar maples.
Check https://academic.oup.com/forestry/article-pdf/88/1/64/14094933/cpu051.pdf
Also check https://www.frontiersin.org/articles/10.3389/fevo.2016.00085/full
Bryson et al (eds) Plant analysis handbook 3rd Edn (2014) has several pages devoted to Maple species nutrient concentrations.
There may be a 4th edition now.
I got an article using DRIS - Wood ash application in sugar maple stands rapidly improves nutritional status and growth at various developmental stages. It's in my profile.
You can also look for Masson et al, 2019, Variation in soil and foliar nutrition status along a forest edge–interior gradient in sugar maple forest fragments. Canadian Journal of Forest Research.
Roch Ouimet did a bunch or work with DRIS.
Here is also a reference that looks at the pros and con of DRIS.
Parent, L. E., Rozane, D. E., Deus, J. A. L. de, & Natale, W. (2020). Chapter 12 - Diagnosis of nutrient composition in fruit crops : Major developments. In A. K. Srivastava & C. Hu (Éds.), Fruit Crops (p. 145‑156). Elsevier. https://doi.org/10.1016/B978-0-12-818732-6.00012-5
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