North American Fruit Explorers mailing list at ibiblio

["Mark Angermayer" <hangermayer@isp.com>]



Alan,

 

Don't forget a vegetable garden requires more alkaline than acid loving fruit crops..  If you try to adjust the soil for blueberries, the vegetables may suffer. 

 

Gypsum is Calcium sulfate which is good, as, at least it's pH neutral.  You probably want to add these minerals in the sulfate form to avoid raising the pH further.  Magnesium sulfate may be a good way to add Mg. 

 

We have at least one real soil scientist on the list.  Interesting to hear his comments.

 

I am curious how high sodic soils can be low in Na?

 

Mark

KS

 

----- Original Message -----

From: Alan Haigh

To: nafex@lists.ibiblio.org

Sent: Friday, January 02, 2009 9:55 AM

Subject: [NAFEX] agronomy question

I am in the Northeast and in the many years I have dealt with hundreds of sites and soils I have always been able to deal with pH issues with either the addition of lime or sulfur.  I only rarely run into base soils and when I have it is always the result of a lot of native limestone in the soil.

 

I have been hired as a troubleshooter recently at 2 sites where testing reveals soils that are very low in calcium, magnesium and manganese andsodium, but high in most other tested minerals.  The pH at both sites is around 7.6.  Because measured sodium is low so I'm guessing the soils may be sodic.  The soils are medium course, without excess clay and have a good amount of organic matter.

 

On one of the sites they are trying to modify for blueberry and strawberry production on the other mixed vegetables (home orchards and veg gardens for tripple digit millionaires).  Any suggestions, especially amending proportions per 100 sq.ft?

 

Does gypsum supply any magnesium as does dolomitic lime?

---

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