• Treevan 🇦🇺@aussie.zone
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    6 months ago

    Environmental conditions (rainfall) will have a massive impact on survival rates here, so much so it blows my mind that the entire industry doesn’t mobilise around the rain systems like La Nina and Indian dipole.

    You can lose species (including the massive nursery effort/footprint) and increase replanting in the dry or just work around the rain with some light maintenance. I think the busywork keeps planting going each year rather than rapid gluts of planting around conditions. It’s a waste of resources but it is what it is. We have just had record dry conditions and high temps and our company did quite a number of plantings because “grants need to be acquitted”. It’s so dumb. Planting into dust is demoralising.

    For reference, my planting since the damaging floods is at 98% survival. The floods removing a significant amount but it’s still only about 4% at planting completion. At the time, it was like 85% of 100 plants.

    • LibertyLizardM
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      6 months ago

      At least in my area precipitation is not predictable enough to rely on that way. We try to time our plantings with the rainy season but predicting which year will be wetter if dryer than average is more or less impossible. Last year was expected to be dry but it was very wet. This year is projected to be wet but so far has been dry. Long range models aren’t good enough to stake your project success on.

      Plus, as you say, it would be difficult to maintain professional staff around working only once every few years. Such a system would be totally lacking in expertise and would also create much inferior working conditions. If the rains don’t come, you need to irrigate more. That’s just how it is and I don’t see a way around it.

      I’m not sure I understand the breakdown of numbers there. Are you counting replants in your survival there? I would not include those because they are of a different age cohort unless planted shortly after the original trees. My number doesn’t include replacements.

      • Treevan 🇦🇺@aussie.zone
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        6 months ago

        I am but one person with a full time job and a “charity” business I run on the side. We have about 4 months of wet weather to plant in on a good year.

        The planting has 3000 plants total, 95% grown by me in nursery. I’m not speedspading as I have to hoe out grass as I go (chemical free site) so I tend to plant approx 50-100 per afternoon I devote to it. 30-60 afternoons say. In one weekend, a flood ripped through and ripped out some oldish ones and a lot of young but I wasn’t finished the site so I just replaced and kept working.

        If I exclude that event, I can only visualise a few deaths across the entire planting. Failure to thrives aren’t included. That’s with zero watering but watering in at planting time.

        Here is a tree that is 12 months old but the earliest part of site is now 2 years old. The youngest is but a few weeks:

        At work we did a planting that had 2 deaths out of 2000; wet years it’s easy to keep the numbers high, you have to fuck it up to do otherwise.