|Re: HD Hass, Reuben Hofshi, 15. Dec 2007 17:55|
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I think it will be fair that you read many of the papers written regarding the different issues you bring up. Regarding high density on flatland you can read a paper by Leo Wiener presented in the VI WAC in Chile (it is posted on avocadosource). You can read about pruning in several papers in the same publication.
Our experience is on steep hillsides and most of our comments are relevant to such an environment.
I can comment about the pollinizers. We have been growing for many years Hass trees together with opposite flowering varieties. We have 11% of the spaces planted with pollinizers and in each one of these spaces we plant 3 SEPARATE pollinizers; Bacon, Zutano and Ettinger. We have planted other varieties as well but this is our usual configuration. If you believe that pollinizers are necessary and the proximity is important, then planting more than one pollinizer in the space will give you better overlap with the main variety such as Hass. There are some papers written by Tom Davenport and also Gazit, Lahav and others that discuss the effect of shelter belts on pollination and fertilization. Unfortunately I don’t think that avocado pollen is easily transferred by wind (at least I am not familiar with research that shows that avocados are wind pollinated).
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