Dr. Gurcharan Singh Ji, I do not know about walnut tree and allelopathy. I have seen that nothing grows under a tree where the shade is so thick that no sunlight penetrates. I have seen someone claim that tamarind tree has also the allelopathy effect. I can not agree to that as I have a couple of them and we have coffee growing very well underneath it. I had a very healthy pepper vine on them and also thick growth of weeds growing under its shade. It is worth observing the rainfall in the area where such observations are made. Another point to be observed is are the walnut trees so close to each other that no sunlight penetrates under the thick canopy. We have a few jack fruit trees so close to each other and no weeds would grow underneath it in spite of very nice mulch and nice loamy soil. Once we regulated the shade, we found lush growth underneath it. This though is the observation of a lay person. Regards Yazdy.
On Tue, Oct 5, 2010 at 12:45 AM, Gurcharan Singh <[email protected]> wrote: > Yes walnut is the commonest example of allelopathy I would tell my students. > Hardly any plant grows beneath it. > > -- > Dr. Gurcharan Singh > Retired Associate Professor > SGTB Khalsa College, University of Delhi, Delhi-110007 > Res: 932 Anand Kunj, Vikas Puri, New Delhi-110018. > Phone: 011-25518297 Mob: 9810359089 > http://people.du.ac.in/~singhg45/ > > On Mon, Oct 4, 2010 at 11:08 AM, Sushmita Jha <[email protected]> > wrote: >> >> Thank you, Mani ji. I did not know that walnut is an allelopathic tree. >> What are the other common trees that are allelopathic? Are neem and banyan? >> Regards, >> Sushmita Jha >> On Mon, Oct 4, 2010 at 11:29 PM, mani nair <[email protected]> wrote: >>> >>> Sushmita ji, nice photos. Last year during our visit to Kashmir we go to >>> see lots of Walnut trees with immature fruits. The tree is very beautiful >>> and is allelopathic - meaning it does not allow any other plants to grow >>> under or near it. >>> >>> Thanks for sharing >>> >>> Regards, >>> >>> Mani. >>> >>> >>> On Mon, Oct 4, 2010 at 11:16 PM, Sushmita Jha <[email protected]> >>> wrote: >>>> >>>> These images have been taken by my brother, Somnath Jha, who is based in >>>> Srinagar. >> > > > >
