Guest chendoh Posted April 5, 2006 Report Share Posted April 5, 2006 In having one of those 'Eureka' moments..........?????? :confused: ????????? It is now,16 days after the Vernal Equinox here in the Northern Hemisphere.My location.....40.2830N, 76.9750W, Enola, Pa. approximately 400miles east of TheBigDog's territory. We had a short Thunder snowsquall pass through this morning at daybreak,and I noticed, :) that it is looking like the Lawn is about ready for its first cut of the season. I also observed last week, the grass being a lot browner.Assumptions:Warmth, moisture, food supply, Health, the sun, location in/out, of sun, sun's angle of incidence. Query: Is it the Sun's angle of incidence that is the main reason for triggering growth? Quote Link to comment Share on other sites More sharing options...
Turtle Posted April 5, 2006 Report Share Posted April 5, 2006 Is it the Sun's angle of incidence that is the main reason for triggering growth? The lengthening of the day after Equinox and consequent additional warming is usually accorded responsibility for triggering new growth. Tilt of Earth & all that. Quote Link to comment Share on other sites More sharing options...
Guest chendoh Posted April 5, 2006 Report Share Posted April 5, 2006 Query: Is it the Sun's angle of incidence that is the main reason for triggering growth? I dashed this off so quick.......Can there be a valid term as 'angle of incidence', maybe attack.....nah....What would the hypotenuse of the sun's ray to the surface of the earth be called?......Off to the Hunt!!! In any event, couldn't the raising of this angle, be compared as the same as your quote? .......The lengthening of the day after Equinox and consequent additional warming.........Not to turn this into a matter of semantics Quote Link to comment Share on other sites More sharing options...
infamous Posted April 5, 2006 Report Share Posted April 5, 2006 The lengthening of the day after Equinox and consequent additional warming is usually accorded responsibility for triggering new growth. Tilt of Earth & all that.Yes Turtle, the lengthening of the day but I remember reading somewhere that in basic terms, it has to do with the amount of sunlight that the grass is receiving. This would, ofcourse, increase with the lengthening of the day so long as the sky was not overcast.................Infy Quote Link to comment Share on other sites More sharing options...
Turtle Posted April 5, 2006 Report Share Posted April 5, 2006 I dashed this off so quick.......Can there be a valid term as 'angle of incidence', maybe attack.....nah....What would the hypotenuse of the sun's ray to the surface of the earth be called?......Off to the Hunt!!! In any event, couldn't the raising of this angle, be compared as the same as your quote? Not to turn this into a matter of semantics Angle of incidence is the correct terminology. I think I understand that you have in mind a plant sensing the angle directly, & I have not run across any studies suggesting that. I mentioned the lengthening day, but as you say the angle is greater too and so heating is increased by the more direct incidense. At any rate, all I have read has the plants responding with new growth to longer light & higher temps [water always of course]. When I raised bonsai I always turned them regularly to promote even growth, as well as change their positions in the yard. I did wonder if this was a stressor to them, but ultimately it's stressing the trees that keeps them small so I went ahead doing it.:cup:PS See 'tropism':http://en.wikipedia.org/wiki/Tropism Quote Link to comment Share on other sites More sharing options...
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