Rev. investig. Altoandin.

Table of contents
Rev. investig. Altoandin. vol.23 no.4 Puno Oct./Dec. 2021

Original Article

	· Presencia de hormonas esteroides en el lago Titicaca y agua potable, Puno (Perú) Zamalloa Cuba, Walter Alejandro; Condori Canaza, Sirleith Siomara; Luque Vilca, Olivia Magaly; Luiz Tornisielo, Valdemar; Zirena Vilca, Franz · abstract in English \| Spanish · text in Spanish · Spanish ( pdf )

	· Characterization of horticultural farms in Cerro Punta, Chiriqui, Panama Herrera, Rito; Collantes, Rubén; Caballero, Martín; Pittí, Javier · abstract in English \| Spanish · text in Spanish · Spanish ( pdf )

	· Response of with yam to different planting densities and trellis height: planting density in Dioscorea rotundata Tamara Morelos, Ricardo Enrique; Luna Castellanos, Lily Lorena; Aroldo Espitia Montes, Amaury; Novoa Yanez, Rafael Segundo; Regino Hernández, Sol Mara; De la Ossa Albis, Víctor Alfonso · abstract in English \| Spanish · text in Spanish · Spanish ( pdf )

	· Estimation of forage consumption for two dairy cattle biotypes in the high Andean tropics of Nariño, Colombia Cardona Iglesias, Juan Leonardo; Avellaneda Avellaneda, Yesid; Castro Rincón, Edwin · abstract in English \| Spanish · text in Spanish · Spanish ( pdf )

	· Copulation length on ovulatory and pregnancy rate in alpacas Hilasaca Mamani, Madeley Gladys; Urviola Sánchez, Jesús Martín; Rodríguez Huanca, Francisco Halley; Leyva Vallejos, Víctor Raúl · abstract in English \| Spanish · text in Spanish · Spanish ( pdf )

	· Impact economic of climate change on crop of organic quinua in the Altiplano Region: a Richardian approach Benique Olivera, Eusebio · abstract in English \| Spanish · text in Spanish · Spanish ( pdf )

Artigo de Revisão

	· Census of aquatic birds and conservation of wetlands in the high Andean slopes of Peru Pulido Capurro, Víctor; Málaga Arenas, Ernesto; Velarde Falconí, David; Cano Coa, Dominga Micaela; Olivera Carhuaz, Edith; Acevedo Flores, Jessica · abstract in English \| Spanish · text in Spanish · Spanish ( pdf )

	· Rhizobia induction mechanisms to reduce drought stress in legumes Villanueva, Nery Santillana · abstract in English \| Spanish · text in Spanish · Spanish ( pdf )

Short Article

	· *Antioxidants and total polyphenols of a black chocolate whit incorporation of unroasted cocoa (Theobroma cacao* L.)** chacón Ortiz, Clorinda Yordana; Mori Culqui, Pati Llanina; Chavez Quintana, Segundo Grimaldo · abstract in English \| Spanish · text in Spanish · Spanish ( pdf )