Hello Vincent, Did you control for tree size, by means of, for instance, calculating yield per trunk cross sectional area. If you did not, then your bigger trees, which by definition became bigger because they were more vigorous, might be expected to carry larger fruits (even if Total fruits per tree is greater (but not too much greater)), by virtue of their vigorous nature. Con
________________________________ From: [email protected] on behalf of Vincent Philion Sent: Mon 13/01/2014 17:12 To: Apple-Crop Subject: [apple-crop] Late summer drop and fruit size Hello, I'm analyzing some data and I have seemingly contradictory results. I'm hoping someone can comment and make sense of this: For a number of randomly selected trees, fruit drop was recorded starting late summer until harvest. For each tree, we recorded total fruit drop (and weight), harvested fruit (and weight) and the total (drop + harvest). As I was looking at the data, I noticed average harvested fruit size (weight/number) was related to Total fruits per tree... Nothing strange, until I realized harvested fruit size INCREASED with Total fruit number on tree. As if the fruit dropping left more energy for the remaining fruits to grow? I was expecting harvested fruit size to be smaller on trees that had more total fruit, not the other way around. I'm not sure this late natural fruit drop can be compared to very late hand thinning, but does anyone know if fruit size increase can be linked to late thinning (notwithstanding total yield that can go down)? Maybe this is "normal"? Any comment welcome! Vincent <http://www.irda.qc.ca/assets/client/img/logo.png> Vincent Philion,M.Sc. agr. Microbiologiste Phytopathologiste pomiculture Institut de recherche et de développement en agro-environnement Research and Development Institute for the Agri-Environment www.irda.qc.ca <http://www.irda.qc.ca/> Centre de recherche 335, Rang des Vingt-Cinq Est Saint-Bruno-de-Montarville (Québec) J3V 0G7 [email protected] Bureau: 450 653-7368 poste 350 Cellulaire: 514-623-8275 Skype: VENTURIA Télécopie: 450 653-1927 Verger expérimental 330, Rang des vingt-cinq Est Saint-Bruno-de-Montarville (Québec) J3V 4P6 Téléphone et télécopieur : 450 653-8375 Local pesticide: 450-653-7608 Pour nous trouver, cliquer sur le lien: Laboratoire <https://plus.google.com/113874173074370918274/about?gl=CA&hl=fr-CA> Verger <https://www.google.ca/maps/preview#!q=verger+irda&data=!4m15!2m14!1m13!1s0x4cc9016b3e604b3d:0x9e4816f2e6bea640!3m8!1m3!1d212357!2d-71.3416925!3d46.8563685!3m2!1i1324!2i934!4f13.1!4m2!3d45.543389!4d-73.341551> Fiers héritiers du travail des frères Saint-Gabri : http://arboretum8gabrielis.wordpress.com <http://arboretum8gabrielis.wordpress.com/> Like most of the data I deal with, I'm best described as either "zero inflated Poisson", or "zero inflated negative binomial". Anything but "Normal". Un expert est une personne qui a fait toutes les erreurs qui peuvent être faites dans un domaine très étroit. ~ Niels Bohr C'est pas parce qu'ils sont nombreux à avoir tort qu'ils ont raison... ~ Coluche To call in the statistician after the experiment is done may be no more than asking him to perform a post-mortem examination: he may be able to say what the experiment died of. ~ Sir Ronald Aylmer Fisher The plural of anecdote is not data. ~ Roger Brinner The combination of some data and an aching desire for an answer does not ensure that a reasonable answer can be extracted from a given body of data. ~ John Tukey Prediction is difficult, especially of the future. ~ Mark Twain (also attributed to Niels Bohr and Yogi Berra) There are three kinds of lies: lies, damned lies, and statistics. ~ Mark Twain or Disraeli Without deviation from the norm, Progress is not possible. ~ Frank Zappa If you don't know where you are going, you will wind up somewhere else. ~ Yogi Berra You can see a lot just by looking. ~ Yogi Berra Poor, but proudly at the highest step I'm qualified for. http://en.wikipedia.org/wiki/Peter_Principle Inhibiteur de rodomontades depuis 1992. Ce que l'on conçoit bien s'énonce clairement, et les mots pour le dire arrivent aisément. ~ Nicolas Boileau-Despréaux Vingt fois sur le métier remettez votre ouvrage ~ Nicolas Boileau-Despréaux Keep your stick on the ice ~ The Red & Green show Quid quid latine dictum sit, altim videtur. ~ Stéphane Laporte Audi alteram partem Qui potest capere capiat AVIS DE CONFIDENTIALITÉ Ce message peut contenir de l'information de nature privilégiée et confidentielle. Si vous n'êtes pas le destinataire visé ou croyez l'avoir reçu par erreur, nous vous saurions gré d'en aviser l'émetteur. Si ce message vous a été transmis par erreur, veuillez le détruire sans en communiquer le contenu à d'autres personnes ou le reproduire
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