Báo cáo khoa học: "Organic matter distribution and nutrient fluxes within a sweet chestnut (Castanea sativa Mill ) stand of the Sierra de Gata, Spain" pps

... Martín A. , Gallardo J.F., Santa Regina I., Dinámica de la descomposición de hojas de rebollo en cuatro ecosistemas forestales de la Sierra de Gata (provincia de Salamanca, Espa a) : Indices de descomposición, ... 1.3 m) of 10 cm and a mean height of 13 m, the mean basal area is 28.58 m 2 ha –1 , and the L .A. I (leaf area index): 3.7 m 2 m –2 (table I). Table I...

Ngày tải lên: 08/08/2014, 14:22

... C., Gallardo J.F., Evolución y velocidad de descomposición de la hojarasca en tres bosque de la Sierra de Béjar (Salamanca), Anuario del Centro de Edafolog a y Biolog a Aplicada, Salamanca, 1 (198 6) ... ( Castanea sativa Mill ) stand of the Sierra de Gata, Spain, Ann. For. Sci. 57 (200 0) 691–700. [77] Santa Regina I., Gallardo J.F., Rico M., Martín A...

Ngày tải lên: 08/08/2014, 14:21

... Cuadrado S,. Datos preliminares sobre biomasa a rea, producción y características edafoclimáti- cas de ecosistemas forestales de Quercus pyrenaica (Sierra de Gata, Salamanca), ... experi- mental plots, at an altitude of 960 m, has an annual mean temperature of 12.4 °C, the average of the minima and maxima of the monthly absolute bein...

Ngày tải lên: 08/08/2014, 14:21

... sentences) is used as training and test data for development. The standard F-scores are used to measure both the word segmentation accuracy and the overall seg- mentation and tagging accuracy, where the ... which can influence the accuracy of the joint model. Here we consider the special character category features and the effect of the tag dictionary. The chara...

Ngày tải lên: 20/02/2014, 09:20

... This example, as well as all sample questions and paraphrases that follow, were, =aken from actual sessions with the paraphraser. Question (A) mad its possible paraphcases (B) and (C) are the ... Philadelphia, Pa. 19104 ABSTRACT: The design and implementation of a paraphrase component for a natural language questlon-answer system (CO-OP) is presented. A major point...

Ngày tải lên: 21/02/2014, 20:20

... transformation to the bracketing: ( ( We ( ran ( would result in ( ( ( We ran ) (and( theywalked )) ) )) . ) , (and( they walked )) ) ). ) RESULTS In the first experiment we ran, training and test- ing ... the true annotation as indi- cated by a small manually annotated corpus, and transformations are learned that can be applied to the output of the...

Ngày tải lên: 31/03/2014, 06:20

... different rainfall regimes of the Sierra de Gata mountains (central western Spain) Juan F. Gallardo a Alejandro Martín b Gerardo Moreno a C.S.I.C., Aptdo 257, Salamanca 37071, Spain b ... Spain b Area de Edafolog a, Facultad of Farmacia, Salamanca 37080, Spain (Received 8 December 1997; accepted 8 January 199 9) Abstract - Nutrient uptake,...

Ngày tải lên: 08/08/2014, 14:21

... will depend on the sink activity, which is itself stimulated by nutrient availability (Cromer and Jarvis, 199 0). Sweet chestnut, Castanea sativa Mill, is a relatively fast ... Castanea sativa Mill Résumé — Les effets d’un enrichissement en CO 2 sur la répartition de la matière sèche et de l’azote chez le châtaignier (Castane...

Ngày tải lên: 08/08/2014, 23:22

... al.Ring shake in chestnut: State of the art Review Ring shake in chestnut (Castanea sativa Mill. ): State of the art Patrick Fonti a *, Nicola Macchioni b and Bernard Thibaut c a WSL Swiss Federal ... insor- genza della cipollatura nel legno di castagno (Castanea sativa Mill. ), in: Comunità montana delle Prealpi Trevigiane (ed), Atti del Convegno naziona...

Ngày tải lên: 08/08/2014, 14:20

... was finished in late August. The rate of appearance of laterals growing acropetally along the unbranched parts of the long roots followed a pattern similar to the one of the long ... of long roots and therefore of laterals was weak throughout the growing season (Figs. 2 and 3). There is some evidence of a com- pensating d...

Ngày tải lên: 09/08/2014, 02:21