Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Estructura, Biomasa a\'erea y carbono almacenado en los bosques del Sur
  y Noroccidente de c\'ordoba   We estimated the aerial biomass and stored carbon in twelve types of forests
in the department of C\'ordoba with annual rain fall ranging from 3000 mm
(super humid climates) to 1300 mm (semi-humid climate). Biomass was estimated
based on structural aspects of the vegetation (diameter at breast height, total
height, and wood specific weight). We tested nine allometric equations for
tropical forests available in the literature and selected those proposed by
Chave et al (2005) that are specific for humid and dry forests. Carbon content
in trees was measured in four tissues (stem, branch, bark, and leafs) through
an automated dry combustion method, which estimates the percentage of carbon in
a sample of known weight.

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The categories of this paper are: chem-ph
3
The categories of this paper are: physics
20
The categories of this paper are: acc-phys
13
The categories of this paper are: quant-ph
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The categories of this paper are: atom-ph
19
The categories of this paper are: eess
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The categories of this paper are: supr-con
11
The categories of this paper are: hep-lat
16
The categories of this paper are: stat
24
The categories of this paper are: dg-ga
12
The categories of this paper are: nucl-th
2
The categories of this paper are: math
33
The categories of this paper are: plasm-ph
21
The categories of this paper are: adap-org
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The categories of this paper are: bayes-an
9
The categories of this paper are: nlin