| Table of contents Ing. agric. biosist. vol.12 n.1 Chapingo Jan./Jun. 2020 Scientific article | | | | · Temporal variability of the groundwater level in the Tecamachalco Valley aquifer, Puebla, Mexico, 1997-2016 Hernández-Vivanco, Lucía; Villarreal-Manzo, Luis Alberto; Ramírez-Valverde, Benito; Ocampo-Fletes, Ignacio; Jaramillo-Villanueva, José Luis; Ortiz-Espejel, Benjamín; Tochihuitl-Tepox, Alejandro
| | | | · Planter to distribute seeds in four-row beds and harvest rainwater Garibaldi-Márquez, Francisco; Martínez-Reyes, Ernesto; García-Hernández, Raúl Vidal; Galindo-Reyes, Manuel Antonio
| | | Technical note | | | | · A function for hydrosystemic management: irrigation distribution planning, demand and canal conduction capacity Íñiguez-Covarrubias, Mauro; Ojeda-Bustamante, Waldo; Flores-Velázquez, Jorge; Díaz-Delgado, Carlos
| | | Scientific article | | | | · Characteristic curve at the inlet of a culvert-type hydraulic model Arellano-Choca, Roberto; Carrillo-García, Mauricio; Ruíz-García, Agustín; Navarro-Gómez, Humberto Iván; Vázquez-Peña, Mario Alberto
| | | Technical note | | | | · Calcium-loaded gelatin nanoparticles as a source of agricultural fertilizer Juan-Martínez, Erwin San; Sandoval-Villa, Manuel; Trejo-Téllez, Libia Iris; Jiménez-Flores, Yolanda; Aguilar-Méndez, Miguel Ángel
| | | Scientific article | | | | · Microparticle enhanced CPC radiant energy collection Reyes-Cortés, Eder; Valle-Guadarrama, Salvador; Reséndiz-Cantera, Omar; López-Bautista, Vicente; Hahn-Schlam, Federico
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