<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/schema/zthes-1.0.dtd">  <Zthes><term><termId>21881</termId><termName>ACIDO HUMICO</termName><termType>PT</termType><termLanguage>es-ES</termLanguage><termVocabulary>TESAURO DE MATERIAS DE SERBIULA</termVocabulary>	<termStatus>active</termStatus>	<termApproval>approved</termApproval>	<termSortkey>ACIDO HUMICO</termSortkey><termCreatedDate>ACIDO HUMICO</termCreatedDate><termModifiedDate>2015-01-30 06:58:51</termModifiedDate><relation><relationType>BT</relationType><termId>6661</termId><termName>ACIDOS ORGANICOS</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>37005</termId><termName>CONTENIDO DE ACIDO HUMICO EN LOS SUELOS</termName><termType>PT</termType></relation></term>  </Zthes>