I didn't say that. some guys use it in proportion with dolomite and oyster shells.
I was responding to the answer above mine, and gave him a rate for outdoor gypsum application.
how much gypsum?
- Thread starter strongbox18
- Start date
I didn't say that. some guys use it in proportion with dolomite and oyster shells.
I was responding to the answer above mine, and gave him a rate for outdoor gypsum application.
I'm using the
1x Dolomite Lime
1x Gypsum
1x Oyster shell flour
as my lime mix. I took some advice from Clackamas Coot and did some reading and decided to give it a go..... my plants look more like captcheeze's every day.
I think a 50lb bag of each totaled $15
Someone asked about oyster shell flour in another thread and I just replied with what I wrote down in my notes about gypsum etc
I also bought a bag of K-mag a couple weeks ago but the granules are very large.... I remember reading someone said you really need a finer version
1x Dolomite Lime
1x Gypsum
1x Oyster shell flour
as my lime mix. I took some advice from Clackamas Coot and did some reading and decided to give it a go..... my plants look more like captcheeze's every day.
I think a 50lb bag of each totaled $15
Someone asked about oyster shell flour in another thread and I just replied with what I wrote down in my notes about gypsum etc
I also bought a bag of K-mag a couple weeks ago but the granules are very large.... I remember reading someone said you really need a finer version
Last edited:
C
Carl Carlson
Has anyone on icmag used drywall?
Stoned Crow
Member
treefrog and cc
the whole cal/mag/N balance is (from my understanidng) nutrient interactions
http://www.apal.com.au/site/DefaultSite/filesystem/documents/APAL%20PLANT%20NUTRIENT%20INTERACTIONS%20July%2008.pdf
all nutrients in the soil or added can interfere with the availability and uptake of others by the plants.
this is why we recomend a balanced well thought out living soil for organic growing & when feeding, less is best.
the whole cal/mag/N balance is (from my understanidng) nutrient interactions
http://www.apal.com.au/site/DefaultSite/filesystem/documents/APAL%20PLANT%20NUTRIENT%20INTERACTIONS%20July%2008.pdf
all nutrients in the soil or added can interfere with the availability and uptake of others by the plants.
this is why we recomend a balanced well thought out living soil for organic growing & when feeding, less is best.
C
Carl Carlson
I first read about this on a mushroom grower's forum.
http://www.calrecycle.ca.gov/conDemo/Wallboard/#Reuse
haven't had a chance to read those reports yet.
http://www.calrecycle.ca.gov/conDemo/Wallboard/#Reuse
Existing Markets for Drywall Waste
New drywall: Drywall gypsum can be recycled back into new drywall if most of the paper is removed. The paper limits the amount of recycled gypsum allowed in new drywall, because the paper content affects its fire rating. One company outside California produces drywall that is 15 to 20 percent recycled; it is working on technology to decrease the paper content so that it can further increase the recycled amount.
Soil Amendment: New construction drywall is currently being recycled into soil amendment in California. Although its use is controversial due to various additives, this use has shown promise in preliminary research. (CIWMB does not recommend that demolition drywall scraps be used for agriculture.)
Markets: The soil amendment market includes:
General agriculture.
Mushroom growing.
Forestry and mine reclamation.
Nurseries.
City parks and recreation areas.
Residential lawns (sod).
Golf courses.
Compost (additive).
Benefits of gypsum: Gypsum provides the following benefits to soils:
Improves water penetration and workability of an impermeable sodic (alkali) soil.
Softens soil with a high clay content.
Helps neutralize soil acidity.
Adds plant nutrients calcium and sulfur.
Boron: Boron is a natural element that is added to drywall as a fire retardant. Although too much boron can be toxic to plants, it is a plant nutrient, and its addition may be beneficial where the boron content in the soil is low. Soils derived from volcanic materials tend to be boron deficient, such as in Shasta and Lassen Counties and the Tule Lake area. If uncertain, or if using on sensitive plants, check soil levels for boron.
Research: There are currently three studies, to Board staff's knowledge, that investigate the use of recycled drywall as a soil amendment. (See the reports by Korcak, Burger, and Dixon listed in "Publications".) The results seem promising; however, before solid conclusions can be reached, more data is needed.
New drywall: Drywall gypsum can be recycled back into new drywall if most of the paper is removed. The paper limits the amount of recycled gypsum allowed in new drywall, because the paper content affects its fire rating. One company outside California produces drywall that is 15 to 20 percent recycled; it is working on technology to decrease the paper content so that it can further increase the recycled amount.
Soil Amendment: New construction drywall is currently being recycled into soil amendment in California. Although its use is controversial due to various additives, this use has shown promise in preliminary research. (CIWMB does not recommend that demolition drywall scraps be used for agriculture.)
Markets: The soil amendment market includes:
General agriculture.
Mushroom growing.
Forestry and mine reclamation.
Nurseries.
City parks and recreation areas.
Residential lawns (sod).
Golf courses.
Compost (additive).
Benefits of gypsum: Gypsum provides the following benefits to soils:
Improves water penetration and workability of an impermeable sodic (alkali) soil.
Softens soil with a high clay content.
Helps neutralize soil acidity.
Adds plant nutrients calcium and sulfur.
Boron: Boron is a natural element that is added to drywall as a fire retardant. Although too much boron can be toxic to plants, it is a plant nutrient, and its addition may be beneficial where the boron content in the soil is low. Soils derived from volcanic materials tend to be boron deficient, such as in Shasta and Lassen Counties and the Tule Lake area. If uncertain, or if using on sensitive plants, check soil levels for boron.
Research: There are currently three studies, to Board staff's knowledge, that investigate the use of recycled drywall as a soil amendment. (See the reports by Korcak, Burger, and Dixon listed in "Publications".) The results seem promising; however, before solid conclusions can be reached, more data is needed.
haven't had a chance to read those reports yet.
