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Ann-Marie Saunders started the discussion winegrape YAN values and SAP N-Total Nitrogen in the forum Fruit and Nuts 2 years ago
winegrape YAN values and SAP N-Total Nitrogen
Hello,
I would first like to say a big THANK YOU to John and the AEA team for taking the time and effort to present and then make available, in this June’s newsletter, the recording of the crop intensive workshop on Viticulture. Considering that it was impossible for me to make it to Napa, it was such wonderful surprise. I totally appreciate…
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Dave Mattinson replied to the discussion Future Analytics soil and sap testing in the forum Soil Health 2 years ago
Reply to Future Analytics soil and sap testing
Great to hear Justin!
I have found one lab here in Australia that does a soil humic/fulvic test but its $300 just for the one test.
Do you know if the ratio is something that changes quickly depending on whats growing or is it something I could get tested every few years? It might be something I can ask my local lab to add if its not too…
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Justin Selte posted an update 2 years ago
It keeps bugging me that I think we discuss legumes in the wrong context. Any discussion I have heard focuses on nitrogen. I wonder if the nitrogen is just a byproduct of the legume. I think the real value is the in the calcium and phosphorus cycling.
The reason I wonder this is that if you think about a legume plant it requires calcium…
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Im guessing its the phosphotase enzymes from root exudates that scavenge P from soils, which are sourced from the carbohydrates that are created through photosynthesis. To break the N2 bond, the bacteria in the nodules need to use 16 ATP (adenosine-tri-phosphate) so goes to show how much they rely on scavenging P from soils. Not sure how much… Read more
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Justin Selte replied to the discussion Future Analytics soil and sap testing in the forum Soil Health 2 years ago
Reply to Future Analytics soil and sap testing
I know and have done some sampling with Melissa. She has been absolutely amazing to deal with. She is quite knowledgable and will set you straight if need be.
The fulvic and humic testing has been eye opening. It is very informative on two levels.
On soil testing it will show you how your soil is feeding what organisms. Ours is very fuvlic vs…
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INDREK started the discussion Soil total acid digestion analysis specifics in the forum Soil Health 2 years ago
Soil total acid digestion analysis specifics
I’m curious, in the case that it is not offered as a package, what specific microelements should I ask to be tested when I want to find out if there is anything important missing in my soil? The method would be ICP-MS
From John’s article I assume that I need to test soil at two different depths: 6-12 inches and 32-64 inches. But how many…
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