Contents AGRONOMÍA COSTARRICENSE VOLUME 39 COMMEMORATIVE ISSUE 2015 Biannual journal of agricultural sciences of the University of Costa Rica, the Society of Ingenieros Agrónomos and the Ministry of Agriculture Presentation Carlos Henríquez Henríquez 7-8 Scientific papers Effect of storage at different temperatures on development of external color and quality of pineapple fruits cv Gold Extra Sweet Luis Ulloa, Marco Vinicio Sáenz and Johanny Castro 9-20 Soil inoculation with Pseudomonas fluorescens, Azospirillum oryzae, Bacillus subtilis and mountain microorganisms (MM) and its effect on a soybean-tomato crop rotation system under greenhouse conditions Leida Castro Barquero, Mariana Murillo Roos, Lidieth Uribe Lorío and Rafael Mata Chinchilla 21-36 Tuber quality and yield components of potato ( Solanum tuberosum) F 1 hybrids Carolina Porras-Martínez and Arturo Brenes-Angulo 37-46 Use of the entomopathogenic nematode Heterorhabditis atacamensis CIA-NE07 in the control of banana weevil Cosmopolites sordidus in vitro Marianela Amador, Diego Molina, Cesar Guillen, Elena Parajeles, Katherine Jiménez and Lidieth Uribe 47-60 Populations and identification of fungi causing postharvest molds, on pineapple peduncles in two regions in Costa Rica Johanny Castro Chinchilla and Gerardina Umaña Rojas 61-77 Effect of land-use on the P forms of an Andisol Carlos Henríquez 79-85 Effect of four growth-promoting rhizobacteria on crown blight caused by Phytophthora capsici in sweet pepper ( Capsicum annuum) Carlos Ramírez, Zorith Soto, Leida Castro, Luis F Arauz, Lorena Uribe-Lorío and Lidieth Uribe 87-100 Grassland soil tillage by three implements in an Ultisol and its physical and hydropedological implications Manuel E Camacho, Rafael Mata and Warren Forsythe 101-115 Concentration and accumulation of nutrients in the aerial biomass of teak plantations 3 to 18 old, in the Panama Canal watershed Rafael Murillo, Alfredo Alvarado and Jean Mark Verjans 117-136 Technical notes Spatial distribution of moisture and its relation with soil texture Kenneth Largaespada and Carlos Henríquez 137-147 Coment 2015: International Year of Soils 149-155