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Détails bibliographiques
Auteur principal:	Alonso Barrios-Trilleras
Format:	Artículo científico
Langue:	en
Publié:	Instituto de Ecología, A.C. 2020
Sujets:	Agrociencias Eucalypt projection prediction growth and yield forest biometrics
Accès en ligne:	https://www.redalyc.org/articulo.oa?id=61763413020 https://www.redalyc.org/journal/617/61763413020/ https://www.redalyc.org/journal/617/61763413020/html/ https://www.redalyc.org/journal/617/61763413020/61763413020.epub https://www.redalyc.org/journal/617/61763413020/movil
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Basal area growth models for Eucalyptus tereticornis Smith stands on the Colombian Atlantic coast Alonso Barrios-Trilleras Ana Milena López-Aguirre Agrociencias Eucalypt projection prediction growth and yield forest biometrics Eucalyptus tereticornis is an important species used in reforestation programs in Colombia. Information on the dynamics and development of the E. tereticornis stands is required to improve management planning. This study compares nine basal area growth models, evaluating their goodness of fit and prediction, and describes their linkage to a thinning response model for E. tereticornis plantations. The evaluated models showed a good fit to the data, the R2 adj ranged between 0.90 - 0.92 and 0.69 - 0.86 for the basal area projection and prediction models, respectively. The root of the mean square error (RMSE) ranged between 1.080 m2 ha-1 - 1.343 m2 ha-1 for basal area projection models and 1.671 m2 ha-1 - 2.206 m2 ha-1 for basal area prediction models. The selected basal area model for unthinned stands depends on the age, stand density, and dominant height. For the thinned stands, the basal area was predicted using a competition index that depends on the age and the dominant height of the stand. The competition index had an R2 adj = 0.87, and a standard error of estimate of 0.031%. The system of equations presented a slight tendency to overestimate with a mean error of -0.14 m2 ha-1 and a RMSE of 0.696 m2 ha-1. This way, the developed models have the potential to be applied to unthinned and thinned stands with different ages, productivity, and planting densities. The developed models provide new tools to support forest management and research of the species growing in plantations. 2020 artículo científico 1405-0471 https://www.redalyc.org/articulo.oa?id=61763413020 https://www.redalyc.org/journal/617/61763413020/ https://www.redalyc.org/journal/617/61763413020/html/ https://www.redalyc.org/journal/617/61763413020/61763413020.epub https://www.redalyc.org/journal/617/61763413020/movil 10.21829/myb.2020.2621924 en http://www.redalyc.org/revista.oa?id=617 Madera y Bosques application/pdf Instituto de Ecología, A.C. Madera y Bosques (México) Num.2 Vol.26

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// Anecdotal testing Today and Yesterday seems to indicate destroy() // is called by the garbage collector and everything is good. // Something to keep in mind though. return 0; } /** * Write function that is called when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ public function write($sessId, $data): bool { if ($this->writesDisabled) { return true; } return $this->saveSession($sessId, $data); } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ abstract protected function saveSession($sessId, $data): bool; }

* * @return void */ public function writeClose() { // The assumption is that we're using PHP's ext/session. // session_write_close() will actually overwrite $_SESSION with an // empty array on completion -- which leads to a mismatch between what // is in the storage object and $_SESSION. To get around this, we // temporarily reset $_SESSION to an array, and then re-link it to // the storage object. // // Additionally, while you _can_ write to $_SESSION following a // session_write_close() operation, no changes made to it will be // flushed to the session handler. As such, we now mark the storage // object isImmutable. $storage = $this->getStorage(); if (! $storage->isImmutable()) { $_SESSION = $storage->toArray(true); session_write_close(); $storage->fromArray($_SESSION); $storage->markImmutable(); } } /** * Attempt to set the session name * * If the session has already been started, or if the name provided fails * validation, an exception will be raised. * * @param string $name * @return SessionManager * @throws Exception\InvalidArgumentException */ public function setName($name) { if ($this->sessionExists()) { throw new Exception\InvalidArgumentException( 'Cannot set session name after a session has already started'

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