Summary: Food insufficiency in corn and water and fertilizer crisis worldwide demand efficiency in the use of resources, increasing or conserving production. Thus, the objective of this research is to explore the response of four white maize hybrids released for valles Altos in two environments considering two population densities, two doses of fertilization and an unfertilized control group. Hybrids were evaluated in a factorial arrangement in Cuautitlan (FESC-UNAM) and Texcoco (CEVAMEX), Mexico State, at two planting densities (D1 = 75,000; D2 = 90,000 plants ha-1) with three fertilization treatments (F1 = 160-80-00, F2 = 120-40-00, F3 = 00-00-00). The completely randomized block design experiment was made up of the treatments and the combination of the factors 2×4×2×3 established in three repetitions. The means were compared with Tukey’s test (P < 0.05). In FESC-UNAM with less total water, the result of grain yield and water productivity was 5.96 Mg ha-1 and 1.29 kg m-3 in CEVAMEX 4.76 Mg ha-1 and 0.5 kg m-3; the Atziri Puma hybrid stood out with 6.52 Mg ha-1 and 1.09 kg m-3. No significant effect of planting density was observed and D1 resulted with 5.32 Mg ha-1 and 0.9 kg m-3 versus D2 with 5.40 Mg ha-1 and 0.9 kg m-3. In fertilization F1 was statistically higher with 5.64 Mg ha-1 and 0.94 kg m-3. Nevertheless, no difference was observed between F2 (5.24 Mg ha-1 and 0.88 kg m-3) and the control F3 (5.19 Mg ha-1 and 0.87 kg m-3), which showed the interaction of the environments with hybrids, of which Atziri Puma stood out at FESC-UNAM (7.3 Mg ha-1 and 1.58 kg m-3). The FESC-UNAM site has productive potential under rainfed conditions with the Puma and INIFAP hybrids.

Resumen: La insuficiencia alimentaria en maíz, la crisis de agua y fertilizantes a nivel mundial, demandan incrementar la eficiencia en el uso de recursos incrementando o conservando la producción. El objetivo del trabajo fue definir la respuesta de cuatro híbridos de maíz blanco (Tlaoli Puma, Atziri Puma, H-49 AE y H-47 AE) en dos ambientes con dos densidades de población y dos dosis de fertilización y testigo sin fertilizar. Como arreglo factorial, en los ambientes Cuautitlán (FESC-UNAM) y Texcoco (CEVAMEX), Estado de México, se evaluaron los híbridos con dos densidades de siembra (D1=75 000; D2=90 000 plantas ha-1) y tres tratamientos de fertilización (F1=160-80-00, F2=120-40-00, F3=00-00-00). El experimento en bloques completos al azar se conformó con los tratamientos y la combinación de los factores 2×4×2×3 establecidos en tres repeticiones. Las medias se compararon con el método Tukey (P < 0.05). Para el rendimiento de grano y productividad del agua, en la FESC-UNAM con menor agua total, resultaron de 5.96 Mg ha-1 y 1.29 kg m-3 en CEVAMEX 4.76 Mg ha-1 y 0.5 kg m-3; el híbrido Atziri Puma sobresalió con 6.52 Mg ha-1 y 1.09 kg m-3. No se observó efecto significativo de la densidad de siembra y D1 resultó con 5.32 Mg ha-1 y 0.9 kg m-3 contra D2 con 5.4 Mg ha-1 y 0.9 kg m-3. En la fertilización, F1 fue superior estadísticamente con 5.64 Mg ha-1 y 0.94 kg m-3, pero no hubo diferencia entre F2 (5.24 Mg ha-1 y 0.88 kg m-3) y el control F3 (5.19 Mg ha-1 y 0.87 kg m-3). Se presentó interacción de los ambientes con los híbridos y destacó el híbrido Atziri Puma en la FESC-UNAM (7.3 Mg ha-1 y 1.58 kg m-3). El sitio FESC-UNAM tiene potencial productivo en condiciones de temporal con los híbridos Puma e INIFAP.

Resumen: La Suma Teológica de Tomás de Aquino discute el acto de enseñanza en el contexto del gobierno mediato del mundo por Dios, quien comunica su perfección creando seres capaces de comunicarla. El artículo sostiene que la clave para comprender el lugar de esa discusión, que es tan relevante como la misma respuesta, es concebir el acto de enseñar como el modo humano de la iluminación, que se realiza mediante la comunicación de un verbo que lleva consigo, de modo participado, la luz del intelecto agente del maestro.

Abstract: Thomas Aquinas’ Summa Theologica discusses the act of teaching in the context of the mediated government of the world by God, who communicates his perfection by creating beings capable of communicating it. The article argues that the key to understanding the locus of that discussion, which is as relevant as the answer itself, is to conceive of the act of teaching as the human mode of illumination, which is realized through the communication of a verb that brings with it, in a participatory way, the light of the teacher’s agent intellect.

RESUMEN Esta investigación tiene como objetivo analizar la percepción del profesorado y del alumnado universitario ecuatoguineano sobre las competencias educativas y tecnológicas emergentes en el contexto africano, en el campus de Bata de la Universidad Nacional de Guinea Ecuatorial. De metodología cuantitativa con un paradigma interpretativo, diseño de investigación no experimental, transeccional, explicativo, descriptivo y correlacional. Utilizamos como instrumento una escala Likert validada en contenido y constructo. El análisis se ha realizado mediante la correlación P de Pearson, el análisis descriptivo y el ANOVA de un factor, tanto para ver las diferencias entre profesores y alumnos, como la influencia de pertenecer a una u otra etnia. En conclusión, destacamos que hay una mayor valoración de las competencias tecnológicas con relación a las personales y sociales. Además, que la etnia determina las diferencias significativas en relación con las competencias sociales. africano Ecuatorial interpretativo experimental transeccional explicativo correlacional constructo Pearson factor alumnos conclusión sociales Además

ABSTRACT The objective of this research is to analyze the perception of the faculty and students of the Equatoguinean University on the emerging educational and technological competencies in the African context, at the Bata campus of the National University of Equatorial Guinea. It was a non-experimental study, with a quantitative methodology, with an interpretive paradigm, cross-sectional, explanatory, descriptive and correlational. We used as instrument a Likert scale validated in content and construct. Data analysis was performed using Pearson's P correlation, descriptive analysis, and one-factor ANOVA, both to see the differences between teachers and students, and the influence of belonging to one ethnic group or another. In conclusion, we highlight that technological skills are valued more than personal and social skills. In addition, ethnicity determines the significant differences in predominant social skills. context Guinea nonexperimental non experimental study methodology paradigm crosssectional, crosssectional cross sectional, sectional cross-sectional explanatory correlational construct Pearsons Pearson s correlation onefactor factor ANOVA another conclusion addition

RESUMO O objetivo desta pesquisa é analisar a percepção dos docentes e dos estudantes da Universidade Equatoguineana sobre as competências educacionais e tecnológicas emergentes no contexto africano, no campus de Bata da Universidade Nacional da Guiné Equatorial. Trata-se de um estudo não experimental, com uma metodologia quantitativa, com paradigma interpretativo, transversal, explicativo, descritivo e correlacional. Utilizamos como instrumento uma escala Likert validada em conteúdo e construção. A análise dos dados foi realizada utilizando a correlação P de Pearson, análise descritiva e ANOVA de um fator, ambos para ver as diferenças entre professores e alunos e a influência de pertencer a um grupo étnico ou outro. Em conclusão, destacamos que as competências tecnológicas são mais valorizadas do que as pessoais e sociais. Além disso, a etnia determina as diferenças significativas em relação às competências sociais predominantes. africano Equatorial Tratase Trata se experimental quantitativa interpretativo transversal explicativo correlacional construção Pearson fator outro conclusão disso predominantes

Resumen El síndrome del linfocito pasajero (PLS) es una complicación de injerto contra huésped que se presenta en el trasplante de órganos sólidos o en el trasplante de células progenitoras hematopoyéticas. Es una causa importante de hemólisis inmune después del trasplante causada por la producción de anticuerpos por parte de los clones específicos de linfocitos B viables transferidos a través del órgano del donante contra los antígenos de los glóbulos rojos del receptor. Generalmente ocurre en los trasplantes con discordancia menor ABO o Rh. Este estudio descriptivo describe el caso de un paciente de 54 años con grupo sanguíneo O/Rh(D) positivo, con cirrosis secundaria a enfermedad metabólica asociada al hígado graso (MAFLD) que fue llevado a trasplante hepático de donante O/Rh(D) negativo. A los 9 días del trasplante presentó una anemia hemolítica inmune por anticuerpos anti-D por efecto del linfocito B pasajero del donante sensibilizado. El paciente recibió medidas de soporte, transfusión de glóbulos rojos e inmunosupresión con esteroides, con lo que se logró la estabilización de los parámetros hemolíticos. En conclusión, esta es una entidad que se debe sospechar en caso de anemia hemolítica aguda en el período postrasplante.

Abstract Passenger lymphocyte syndrome (PLS) is a graft-versus-host complication in solid organ transplantation or hematopoietic stem cell transplantation. It is a major cause of immune hemolysis after transplantation caused by the production of antibodies by the specific clones of viable B lymphocytes transferred through the donor organ against the antigens of the recipient’s red blood cells. It usually occurs in transplants with minor ABO or Rh mismatch. This descriptive study explains the case of a 54-year-old patient with O/Rh(D) positive blood group, with cirrhosis secondary to metabolic disease associated with fatty liver (NAFLD), who underwent liver transplantation from an O/Rh(D) negative donor. Nine days after the transplant, the patient presented with immune hemolytic anemia due to anti-D antibodies because of the transient B lymphocyte from the sensitized donor. The patient received support measures, transfusion of red blood cells, and immunosuppression with steroids, which stabilized the hemolytic parameters. In conclusion, this entity should be suspected in the case of acute hemolytic anemia in the post-transplant period.

Resumen En México el maíz (Zea mays L.), es el cultivo más importante por su superficie sembrada, su consumo superior a 200 kg por persona al año, así como por el rol que juega en la economía. Cada año se importan más de 12 millones de toneladas de maíz, por lo que es urgente incrementar la producción de grano, para ello se requieren variedades mejoradas con buena productividad, como el híbrido H 49 AE, que se generó en el Programa de Mejoramiento Genético de Maíz del Instituto Nacional del Instituto Nacional de Investigaciones Forestales Agrícolas y Pecuarias con sede en el Campo Experimental Valle de México, el híbrido H 49 AE, con androesterilidad en sus progenitores, resuelve el problema que se presenta en la producción de semilla híbrida de maíz, ya que limita el desespigamiento, lo que favorece mantener la calidad genética de la semilla; ahorra de 24 a 50 jornales ha-1, labor que provoca quebrantos económicos en las empresas de semillas y desaprovechamiento de semilla registrada, además limitada producción de grano, por no utilizar los mejores maíces híbridos. El rendimiento medio de H 49 AE, en la validación, en el Estado de México fue de 10 700 kg ha-1, con variación de 8.5 a 12.5 t ha-1. En promedio el comportamiento es superior en 23.7% con respecto al híbrido testigo ‘H-48’.

Abstract In Mexico, corn (Zea mays L.) is the most important crop due to its sown area, its consumption of more than 200 kg per person per year, as well as due to the role it plays in the economy. Every year more than 12 million tonnes of corn are imported, so it is urgent to increase grain production, for this, improved varieties with good productivity are required, such as the H 49 AE hybrid, which was generated in the Corn Genetic Improvement Program of the National Institute of Forestry, Agricultural and Livestock Research based in the Valle de México Experimental Field, the H 49 AE hybrid, with androsterility in its progenitors, solves the problem present in the production of hybrid corn seed, since it limits the detasseling, which favors maintaining the genetic quality of the seed; saves from 24 to 50 daily wages ha-1, work that causes economic loses in seed companies and waste of registered seed, in addition to limited grain production, for not using the best hybrid corns. The average yield of H 49 AE, in the validation, in the State of Mexico was 10 700 kg ha-1, with a variation from 8.5 to 12.5 t ha-1. On average the behavior is higher by 23.7% with respect to the control hybrid ‘H-48’.

Abstract A field that has been widely studied today are the factors that influence Mathematics Learning Disorders (MLD). Among these factors, teachers' beliefs stand out. Therefore, it is necessary to have valid and reliable questionnaires to know how these teachers' beliefs can influence the children's mathematics learning difficulties. The purpose of this study is to design a questionnaire to learn about teachers' beliefs and how they influence MLD. A total of 390 primary school teachers from the Autonomous Community of Extremadura participated in the study. An Exploratory Factor Analysis (EFA) was performed. In conclusion, it was found that the scale of teaching beliefs about MLD in Primary Education showed very good rates of adjustment in the EFA. In turn, the scale has an excellent internal consistency (.914) (Cronbach), thus confirming the validity of the questionnaire.

Resumen Los factores influyentes en las Dificultades de Aprendizaje de las Matemáticas (DAM) son un campo de estudio ampliamente estudiado, hoy en día, y entre estos factores destacan las creencias de los maestros/as. Por lo tanto, es necesario contar con instrumentos válidos y fiables para conocer como estas creencias de los maestros pueden influir en las DAM en los niños y niñas. El propósito de este estudio es construir un instrumento para conocer las creencias del profesorado y como estas influyen en las DAM. En el estudio participaron 390 maestros y maestras de Educación Primaria de la Comunidad Autónoma de Extremadura. Se realizó un Análisis Factorial Exploratorio (AFE) para la validación del instrumento. En conclusión, se pudo comprobar que la escala de creencias docentes sobre las DAM en Educación Primaria manifestó índices de ajuste muy buenos en el AFE, presentando una excelente consistencia interna (.914) (Cronbach), por lo tanto, se confirma la validez del instrumento.

Resumo A pesquisa aqui apresentada se baseia no pressuposto de que existe uma falta de informação, tanto nacional como internacional, sobre a neuropedagogia, e que há provas mais do que suficientes da necessidade de uma conceitualização da neuropedagogia. Por essa razão, o objetivo geral é analisar a relação entre neuroeducação, neurodidática, treinamento de professores e neuropedagogia. A coleta de dados foi realizada utilizando um questionário ad hoc de escala Likert de 27 itens, confiável (Cronbach’s Alpha, .973) e validado em termos de conteúdo e construção com uma análise exploratória de fatores (KMO (.843), Bartlett (Sign.000), Determinant (9.416E-19)). A amostra da pesquisa foi selecionada por conveniência entre professores universitários na Espanha, Paraguai, Equador, Brasil e México, com um total de 1264 participantes. O desenho da pesquisa é não-experimental, descritivo, explicativo, correlacional e regressivo. Os resultados mostram que o futuro da pedagogia deve incluir a neuropedagogia, evidenciando que a neuropedagogia precisa do conhecimento da neuroeducação, que a neurodidática é a aplicação prática da neuropedagogia, a importância da neuroorientação e da neuro-organização na educação, e a necessidade de treinamento de instrutores. Tudo isso é reforçado pelos exemplos mostrados de neuroimagem que demonstram a necessidade de neuropedagogia e treinamento de professores em neuropedagogia.

Abstract The present study is based on the assumption that there is a lack of information, both nationally and internationally, on neuropedagogy, and that there is more than enough evidence of the need for a conceptualization of neuropedagogy. Therefore, the general objective is to analyze the relationship between neuroeducation, neurodidactics, teacher training and neuropedagogy. Data collection was carried out with a 27-item ad hoc Likert scale questionnaire, reliable (Cronbach’s Alpha, .973), and validated in its content and construct with an exploratory factor analysis (KMO (.843), Bartlett (Sign.000), Determinant (9.416E-19)). The research sample was selected by convenience from among university teachers in Spain, Paraguay, Ecuador, Brazil and Mexico, with a total of 1264 participants. The research design is non-experimental, descriptive, explanatory, correlational and regression-based. The results show that the future of pedagogy must include neuropedagogy, evidencing: 1) the need of neuroeducation knowledge for Neuropedagogy; 2) the understanding of neurodidactics as the practical application for neuropedagogy, 3) the importance of neuro-orientation and neuro-educational organization, and 4) the need for the training of trainers. All of which is reinforced by the examples shown of neuroimaging that demonstrate the need for neuropedagogy and teacher training in neuropedagogy.

RESUMO O objetivo geral desta investigação é analisar, através de um desenho fatorial confirmatório, as relações entre a prática desportiva, interesse, frequência e razões pelas quais os estudantes universitários praticam desporte. A fim de responder a este objetivo, apresentamos uma pesquisa descritiva, explicativa e correlacional. Como instrumento utilizamos uma escala Likert de autoria própria, estruturada em cinco dimensões, com 28 itens, que foi validada por uma análise fatorial exploratório. A escala foi aplicada a uma amostra de 1185 estudantes universitários do primeiro ao quarto ano, sendo todos estudantes de uma universidade andaluza. Os resultados obtidos mostram que a práticas desportiva e o interesse pelo desporte têm uma forte relação, assim como o desporte e os motivos para praticar um desporte. Por outra parte, a frequência que pratica um deporte a o motivo para não praticar-lo não tem relação.

ABSTRACT The aim of this research is to analyze, through a confirmatory factorial design, the relationships between sports practice, interest, frequency and reasons why university students practice sports. In order to respond to this objective, a descriptive, explanatory and correlational research is presented, a Likert scale of own authorship is applied, structured in five dimensions and 28 items, which was validated by an exploratory factor analysis. The research was applied to a sample of 1185 undergraduate university students from first to fourth year, all of them students of an Andalusian university. The results obtained show that sport practices and interest in sport have a strong relationship, as well as this and reasons for practicing a sport, while between frequency with which they practice a sport and the reasons for not practicing have hardly any relationship.

RESUMO O objetivo geral deste trabalho é analisar a relação entre a educação inclusiva e as condições sociais, interculturais e pessoais dos professores em tempos de pandemia (COVID-19) através da metodologia da equação estrutural. Esta metodologia proporciona ao objetivo da pesquisa a capacidade de relacionar as dimensões do estudo de uma forma matemática. A amostra foi selecionada por conveniência (Espanha-Equador), sendo composta por 810 professores universitários. Em conclusão destacamos que a relação mais alta está entre as dimensões condição intercultural e condição pessoal, enquanto que a relação mais baixa está entre condição intercultural e condição social. A educação inclusiva, portanto, é mediada por esses condicionantes e, apesar do COVID-19, manifesta-se no momento de compartilhar com pessoas de outras culturas, com empatia em situações difíceis de pandemia.

ABSTRACT The general objective of this work is to analyze the relationship between inclusive education and the social, intercultural and personal conditions of teachers in times of pandemic (COVID-19) through structural equation methodology. This methodology contributes to the research objective by being able to relate the study dimensions in a mathematical way. The sample, selected by convenience (Spain-Ecuador), is made up of 810 university teachers. The conclusion is that the highest relationship is between the dimensions intercultural condition and personal condition, while the lowest relationship is between intercultural condition and social condition. Inclusive education, therefore, is mediated by these conditioning factors and, in spite of COVID-19, it is manifested at the moment of sharing with people from other cultures, with empathy in difficult situations of pandemic.

RESUMEN El objetivo general de este trabajo es analizar la relación entre educación inclusiva y las condiciones sociales, interculturales y personales de los docentes en tiempos de pandemia (COVID-19) a través de metodología de ecuaciones estructurales. Esta metodología aporta al objetivo de investigación el poder relacionar las dimensiones de estudio de forma matemática. La muestra, seleccionada por conveniencia (España-Ecuador), está formada por 810 docentes universitarios. La conclusión es que la relación más alta se da entre las dimensiones condición intercultural y condición personal, mientras que la menor relación se da entre condición intercultural y condición social. La educación inclusiva, pues, está mediatizada por estos condicionantes y a pesar del COVID-19 se manifiesta en el momento de compartir con personas de otras culturas, con la empatía en situaciones difíciles de pandemia.

ABSTRACT: Considering that the educational models respond to the type of individuals and society that one wants to form, the present study investigates about the relations of correspondence between two approaches that have been installed in our society for a few decades and that cohabit in the classrooms of schools belonging to the Valparaiso region, namely, assessment by competencies and evaluation for educational inclusion. For this purpose, 268 teachers from schools where competency curriculum was established and 25 teachers from a school self-defined as inclusive were interviewed. It is expected to determine the compatibility and coherence between the evaluation strategies and instruments of both approaches. As a product of the present study, an instrument will be proposed that makes it possible to evaluate both competencies and educational inclusion simultaneously in the classroom.

RESUMEN: Considerando que los modelos educativos responden al tipo de individuos y de sociedad que se quiere formar, el presente estudio indaga respecto de las relaciones de correspondencia entre dos enfoques que se han instalado en nuestra sociedad desde hace algunas décadas y que cohabitan en las aulas de escuelas pertenecientes a la región de Valparaíso, a saber, la evaluación por competencias y la evaluación para la inclusión educativa. Para tal efecto se ha encuestado a 268 docentes de escuelas en las que se instauró un currículo por competencias y a 25 docentes de una escuela autodefinida como inclusiva. Se espera determinar la compatibilidad y coherencia entre las estrategias e instrumentos evaluativos de ambos enfoques. Como producto del presente estudio, se propondrá un instrumento que posibilite evaluar tanto las competencias como en la inclusión educativa de manera simultánea en el aula.

ABSTRACT The management of organic materials in vine (Vitis vinifera L cv Malbec) is important when working with winter manure or cattle manure, which activates the surface rootless but this type of organic matter is restricted to use it in fields far from the sources of fruit processing therefore the we need to develop other organic matter sources with the same effects. For this reason this research evaluates the influence of hums from vermiscompost (V) elaborated by Eisenia foetida on the productive yields of vine on sandy soils (Aridisol) in Ica, Peru. The experiment used a randomized complete block design (DBCA) with four replications and four treatment base on the doses of V and they were T1 which is the control with no V; T2 is 1.5 t ha- 1 of V; T3 is 2.5 t ha -1 of V and T4 is 3.5 t ha -1 of V. For the analysis of variance (ANOVA) SAS statistical software was use. The results obtained did not show statistical differences between the average production but there was a tendency to increase production with applications of 2.51 ha -1 with yields of 12807 kg ha -1 while the control with no V being the treatment with the lowestproduction. Pearson's Correlation Coefficient analysis indicates that there is a moderate positive association (r = 0.5) and a relation with linear approximation between the quantitative variables. In conclusion, the result of the mathematical model resulting from the linear regression equation indicated that for each additional kg of vermicompost can be expected an increase of 1.43 kg of vine.

RESUMEN El empleo de materias orgánicas en el cultivo de vid (Vitis vinifera L. cv. Malbec) es importante en su manejo, y se trabaja principalmente con el guano de inverna o estiércol de vacuno, el cual activa la emisión de raicillas superficiales. Pero el uso de este tipo de abonose ve restringido a campos alejados de las zonas de procesamiento de la fruta, y por ello se trata de utilizar otras fuentes orgánicas que tengan el mismo efecto. Por esta razón esta investigación evalúa la influencia de vermicompost humus de lombriz (Eisenia foetida) en el rendimiento productivo del cultivo de vid en Ica, Perú, en un suelo arenoso (Aridisol). Se usó el diseño experimental de bloques completos aleatorizados DBCA con cuatro repeticiones y cuatro tratamientos con base en las dosis de vermicompost (V): el T1 que es el control sin V; T2: 1,5 t ha-1 de V; T3: 2,5 t ha-1 de V y T4: 3,5 t ha-1 de V. Para el análisis de varianza (ANOVA) se utilizó el software estadístico SAS. Los resultados obtenidos no mostraron diferencias estadísticas entre las producciones promedio, pero se observó una tendencia a incrementos de producción con aplicaciones de 2,5 t ha-1 con rendimientos de 12807 kg ha-1), y el control sin vermicompost fue el tratamiento con menor producción. El análisis de coeficiente de correlación de Pearson indica que hay una asociación positiva moderada (r = 0,50) y una relación con aproximación lineal entre las variables cuantitativas. En conclusión, el resultado del modelo matemático producto del desarrollo de la ecuación de regresión lineal demostró que por cada kilogramo adicional de vermicompost, se puede esperar un aumento de 1,43 kilogramos de producción de vid.

Abstract The productivity of fresh tubers and dry matter of 15 traditional potato cultivars of the Phureja group from Cajamarca was evaluated, in eight different environments. Sowings were carried out in the valley of Cajamarca. The randomized complete block design was used, with 15 treatments and three repetitions. The sowing was carried out at 0.9 m between furrows and 0.4 m between plants. 5 t ha-1 of worm humus and a compound fertilizer (15-24 -14 of N, P and K) at the rate of 300 kg ha-1 were applied. Eight plants per treatment were taken at harvest and the variables related to yield were evaluated. Significant statistical differences were found between cultivars for the variables: total weight of tubers, weight of commercial tubers, total number of tubers, number of commercial tubers, plant height, number of stems and dry matter. The cultivars ‘Chachapoyana’, ‘Montañera’, ‘Blanca’ and ‘Shoga’ were the best in fresh tuber yield and the cultivars ‘Piña amarilla’, ‘Shoga’ and ‘Porpora’ the best in dry matter. The environments presented significant statistical differences for the variables NTT, NTC, AP and NT.

Resumen Se evaluó la productividad de tubérculos frescos y de materia seca de 15 cultivares tradicionales de papa del grupo Phureja de Cajamarca, en ocho ambientes distintos. Las siembras se realizaron en el valle de Cajamarca. Se usó el diseño de bloques completos al azar, con 15 tratamientos y tres repeticiones. La siembra se realizó a 0.9 m entre surcos y 0.4 m entre plantas. Se aplicó 5 t ha-1 de humus de lombriz y un fertilizante compuesto (15-24 -14 de N, P y K), a razón de 300 kg ha-1. A la cosecha se tomaron ocho plantas por tratamiento y se evaluaron las variables relacionadas con el rendimiento. Se encontraron diferencias estadísticas significativas entre cultivares para las variables: peso total de tubérculos, peso de tubérculos comerciales, número total de tubérculos, número de tubérculos comerciales, altura de planta, número de tallos y materia seca. Los cultivares ‘Chachapoyana’, ‘Montañera’, ‘Blanca’ y ‘Shoga’, fueron los mejores en rendimiento de tubérculos frescos y los cultivares ‘Piña amarilla’, ‘Shoga’ y ‘Porpora’, los mejores en materia seca. Los ambientes presentaron diferencias estadísticas significativas paras las variables NTT, NTC, AP y NT.