Yield class ranges - help or info

[jimmylad]

Hello all.

 

I'm looking for a source (ideally from a journal or fc book) on site index curves/yield class ranges for Sitka, Douglas f and Jap' larch. Ideally what the average yield ranges varies from and to (i.e. yc14 to yc22), if that makes sense.

 

Any ideas to pointers would be gratefully appreciated.

 

Regards

 

James

[kernowstu]

the fc blue booklet 39, has all the info needed if i remember right.

[NI Tree]

booklet 48 is the one you want

 

i got it them in front of me what do you need excatly

[kernowstu]

booklet 48 is the one you want

 

i got it them in front of me what do you need excatly

 

booklet 48 it is then:001_smile:

[NI Tree]

yep i got the uni ones,

[jimmylad]

Cheers all, I really appreciate it.

 

NI Trees, if you have the book to hand its the yield ranges of Sitka, Douglas fir and Jap' larch, i.e. what ranges to they stretch, eg does Sitka have a range between 12 and 24, Douglas 12-24 etc. I have all the tarrif tables and such, its just am not sure of what would be classed as a productive yield number for each of the above.

 

Again thanks alot.

 

Regards

 

James

[Ian Haynes]

Cheers all, I really appreciate it.

 

NI Trees, if you have the book to hand its the yield ranges of Sitka, Douglas fir and Jap' larch, i.e. what ranges to they stretch, eg does Sitka have a range between 12 and 24, Douglas 12-24 etc. I have all the tarrif tables and such, its just am not sure of what would be classed as a productive yield number for each of the above.

 

Again thanks alot.

 

Regards

 

James

 

 

Evening James,

 

Species Minimum Yield Class off the top of my head are,

 

Douglas Fir - 16

 

Japanese/hybrid larch - 12

 

Sitka -14

 

Yield class is stand/area specific as some many factors affect the yield class.

 

Its not as straight forward to have a species listed as 12-24 when on a certain site in would only achieve 4.

 

Hope this helps,

 

Ian