Evolution of iron and manganese concentrations in presence of carbonates and clays in the alluvial groundwaters of the Ognon (Franche-Comté, France)

Geoderma ◽  
1989 ◽  
Vol 44 (2-3) ◽  
pp. 219-227 ◽  
Author(s):  
J. Mania ◽  
P. Chauve ◽  
F. Remy ◽  
P. Verjus
Keyword(s):  
Iron And Manganese ◽  
Manganese Concentrations

scholarly journals Sensory Quality Ratings and Mineral and Glycoalkaloid Concentrations in Organically and Conventionally Grown Redskin Potatoes (Solanumtuberosum)

HortScience ◽  
2005 ◽  
Vol 40 (4) ◽  
pp. 1118E-1119
Author(s):  
Annette Wszelaki ◽  
Jeannine Delwiche ◽  
Sonia Walker ◽  
Rachel Liggett ◽  
Joseph Scheerens ◽  
...  
Keyword(s):  
Sensory Quality ◽  
Soil Treatment ◽  
Tuber Skin ◽  
Quality Ratings ◽  
Sensory Evaluations ◽  
Potassium Magnesium ◽  
Iron And Manganese ◽  
Manganese Concentrations

Sensory evaluations (triangle tests) were used to determine if panelists could distinguish, by tasting, cooked wedges of potatoes grown organically, either with or without compost, and conventionally. Mineral and glycoalkaloid analyses of tuber skin and flesh were also conducted. When the skin remained on the potatoes, panelists detected differences between conventional potatoes and organic potatoes, regardless of soil treatment. However, they did not distinguish between organic treatments (±compost) when samples contained skin or between any treatments if wedges were peeled prior to preparation. Glycoalkaloid levels tended to be higher in organic potatoes. In tuber skin and flesh, potassium, magnesium, phosphorus, sulfur, and copper concentrations were also significantly higher in the organic treatments, while iron and manganese concentrations were higher in the skin of conventionally grown potatoes.

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