000			01362nam a2200325 4500
999			_c3635
003			EC-UrYT
005			20191015133711.0
006			s||||gr|||| 00| 00
008			150116t9999 mx r gr 000 0 spa d
020			_a0309019486
040			_aEC-UrYT _cEC-UrYT
041			_aeng
082	0	4	_223 _a631.4913
110	2		_911583 _aNational Research Council (U.S.). _bCommittee on Tropical Soils
245	1	0	_aSoils of the humid tropics / _cNational Research Council (U.S.). Committee on Tropical Soils.
250			_aFirst Edition
264	3	4	_aWashington, D.C. : _bNational Academy of Sciences ; _c1972.
300			_avii, 219 pages : _bmaps ; _c23 cm.
505	2		_aResearch needs -- Soil survey -- Soil microvariability -- Physical properties of soils -- Soil nitrogen and organic matter -- Soil phosphorus and sulfur -- Soil acidity and liming -- Soil micronutrients -- Soil silicon and plant nutrition -- Fertilizers -- Soil management systems -- Soil testing and soil fertility evaluation services.
650	2	4	_911584 _aSoil fertility
650	2	4	_99700 _aSoils
650	2	4	_97274 _aTropics
650	2	4	_911585 _aFertilidad del suelo
650	2	4	_9312 _aSuelos
650	2	4	_97275 _aZona tropical
942			_2ddc _cLIBRO