Thank you for all the information you gave. I will try to do some coding.
charlescu...@gmail.com schrieb am Mittwoch, 16. Dezember 2020 um 04:18:08 UTC+1: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > On Tue, 15 Dec 2020 09:25:48 -0800 (PST) > Ton vanN <ton...@gmail.com> wrote: > > > You open can of worms, because [there are] a large amount of > > variations of Growing Degree Days related to different animals, > > insects and plants. > > See: > > o University of California, Agriculture and Natural > Resources. "Research Models: Insects, Mites, Diseases, Plants, and > Beneficials." 2014. 15 Apr. 2018 > <http://ipm.ucanr.edu/MODELS/index.html>. > > o Coop, Len. "Library of Degree-Day Models for Insects and Plants." 11 > Feb. 2007. Integrated Plant Protection Center, Oregon State U. 1 > Nov. 2020 <http://uspest.org/wea/wealib.html.> > > The models for insect development are very similar but have different > threshold and cutoff temperatures and use different cutoff techniques. > Models developed in one part of the world may not be immediately > applicable to other parts. Many insect species apparently have local > strains that are adapted to local conditions. The models are robust > enough to be useful without exactly matching local conditions, and > differences between modeling techniques are minor. > > There are all kinds of weather-related mathematical models with > agribusiness applications beyond just weather prediction. Recently, > I stumbled upon one that models the growth of pollen tubes in apples > dependent upon temperature. The idea is that you can burn off the > flowers by spraying lime sulfur. The trick is to do this after the > pollen tubes for the king fruit have reached their ovaries and to keep > doing it often enough to keep new pollen tubes from reaching theirs. > This favors the earliest flowers while thinning the rest of the crop in > (hopefully) an organically acceptable way. There are attendant risks. > Early pollination may not be as reliable as you suppose or as you > hope. Different varieties of apples have different pollen-tube > lengths, and the germ plasm traverses them at different rates, so you > may not be using an appropriate model if you have a different > pollinator or an odd-ball variety of apple or even a variant of a well > tested variety. I guess the gee-whiz factor makes up for the > uncertainties of the technology. > > - -- > .. Be Seeing You, > .. Chuck Rhode, Sheboygan, WI, USA > .. Weather: http://LacusVeris.com/WX > .. 30° — Wind N 3 mph — Sky overcast. > > -----BEGIN PGP SIGNATURE----- > > iF0EARECAB0WIQT+MY/5I/LMPSswTbVg2/xipKOWUgUCX9l8XwAKCRBg2/xipKOW > UgvzAJ4nE9JmF89LohMhcmDJ9Y+eu2DbVgCfZnpV0byyhhQVdbIJr5Gf9ySgkk8= > =fJJ8 > -----END PGP SIGNATURE----- > -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to weewx-user+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-user/eec0e620-013d-446d-9744-97a20f390320n%40googlegroups.com.
