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1
artículo
Impact of two tillage practices on selected soil properties, growth and yield of maize on an ultisol
Publicado 2022
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This study investigated the effect of two tillage practices on maize yield and growth, and selected soil properties of an Ultisol of Osun State in Nigeria. This was aimed at selecting an appropriate tillage practice for crop growth and soil maintenance. The study was divided into two experimental plots during the early and late cropping season in 2014. The first plot was manually cleared to have zero tillage while the second plot was plowed twice and harrowed once for conventional tillage. Each plot had three blocks (23.0 m x 2.5 m) with an alley of 1.0 m between blocks and 1.0 m within plots. Three seeds of the test crop were a distance of 75 cm x 50 cm per hill and each plot weeded manually at two weeks intervals till harvest. The selected soil physical and chemical properties and plant growth parameters were collected and determined using standard method after each cropping season. At...
2
artículo
Publicado 2012
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The theory of the Multiple Intelligence represents an innovative vision in the field of the psychology of the education, because it offers a different mark for the best alignment in the teaching-learning process, making possible that the student identifies his strong and weak intellectual points better; and that, with this information, the or the educational one selects the resources and didactic strategies so that in work group that it develops even more the strongest and improve the weak ones, always looking for the achievement of their personal satisfaction and professional success. In this perspective, the evaluation of the multiple intelligence in a valid and reliable way acquires fundamental importance, for what we decide to elaborate one when not existing in the country instruments with these characteristics; also, also interested in the problem of the first floor school yield in ...
3
artículo
Publicado 2012
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The theory of the Multiple Intelligence represents an innovative vision in the field of the psychology of the education, because it offers a different mark for the best alignment in the teaching-learning process, making possible that the student identifies his strong and weak intellectual points better; and that, with this information, the or the educational one selects the resources and didactic strategies so that in work group that it develops even more the strongest and improve the weak ones, always looking for the achievement of their personal satisfaction and professional success. In this perspective, the evaluation of the multiple intelligence in a valid and reliable way acquires fundamental importance, for what we decide to elaborate one when not existing in the country instruments with these characteristics; also, also interested in the problem of the first floor school yield in ...
4
artículo
Publicado 2023
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The indiscriminate use of chemical products in agriculture degrades the soil ecosystem, to mitigate this situation, it is proposed to determine the effect of organic matter on the physicochemical characteristics of the soil and the yield of purple corn (Zea mays L.), it was used the DBCA experimental design with 4 repetitions and with the following treatments: T1: INIA 615/30 t/ha EV; T2: INIA 615/40 t/ha EV; T3: INIA 615/30 t/ha ECS; T4: INIA 615/40 t/ha ECS; T5: INIA 615/200N-150P205-120K2O; T6: PMV 581/30 t/ha EV; T7: PMV 581/40 t/ha EV; T8: PMV 581/30 t/ha ECS; T9: PMV 581/40 t/ha ECS and T10: PMV 581/200N-150P205-120K2O. The analyzes showed that by incorporating organic and inorganic fertilizers the texture of the sandy loam soil remains the same, however, after a certain time, the values of the physicochemical properties of the soil increase and after sowing purple corn, thes...
5
artículo
Publicado 2022
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Thermal regulation and ultrasound affect the physical, chemical, and antioxidant properties of essential oils and hydrosols extracted by microwaves from the leaves of Tagetes elliptica S. (chincho). The leaves were conditioned by dehydration or freezing, then pre-treated with ultrasound for 15 or 30 minutes at 40 Hz to finally obtain the essential oil (AECH) and hydrolat (HCH) through microwave extraction (500 W and 30 minutes). Yields, phenolic content, antioxidant capacity, leaf structure by optical microscopy, and chemical composition by gas chromatography and mass spectrometry (GC-MS) were evaluated. The conditioning of the leaves by freezing and sonication for 30 minutes obtained the best performance, 8.86±0.1% and 67.40 ± 4.8%, phenolic content of 39.4±0.1 mg EAG/mL and 346.2 ± 13.6 mg EAG/mL, and antioxidant capacity of 35.7 μmol EqT/mg and 0.25 μmol EqT/mg equivalent, for A...
6
artículo
Publicado 2022
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The Peruvian Altiplano presents increasing fertility losses, being susceptible to natural erosion. For many years, conventional agricultural management has generated losses of the topsoil and deterioration of soil properties, impacting in crop yields and deepening the degradation of this vulnerable ecosystem. The aim of this research was to determine the benefits of cover crops against erosion, soil health and quinoa yield. The trial was carried out in Huancarani and Cahualla towns, Mañazo district, Puno; with a randomized complete block design (RCBD) with four treatments: without cover and with clover (Medicago hispida G.), vetch (Vicia villosa) and mulch covers. We evaluated the physical, chemical, and biological characteristics of soil, the biomass of the cover crops and the quinoa yield. The results showed that the treatments with clover, mulch and vetch covers reduced soil erosion ...
7
artículo
Publicado 2021
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The oil of debittered and dehulled grains from two Andean lupins (Lupinus mutabilis) from Peru, Andenes and Común, was extracted by expeller press. The extraction yield and the proximal composition of both varieties were assessed. The oil and the cake, as well as the defatted flour from the variety with the highest extraction yield, were characterised for physico-chemical properties, total polyphenol content and antioxidant capacity. The oil shelf-life at 25 °C was extrapolated by Rancimat test. Andenes presented an oil yield of 22.1% (vs. 18.4% of Común), CIELAB colour coordinates of L* = 36.5, a* = 2.2, b* = 20, refractive index and density at 25 ºC of 1.469 and 0.903 g/mL, acid number of 3.2 mg KOH/g, free fatty acids content of 1.6%, peroxide number of 2.7 meqO2/kg, p-anisidine number of 1.3, unsaponificable content of 58%, total antioxidant capacity 21.4 µmol TE/g and total pol...
8
artículo
Publicado 2021
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The oil of debittered and dehulled grains from two Andean lupins (Lupinus mutabilis) from Peru, Andenes and Común, was extracted by expeller press. The extraction yield and the proximal composition of both varieties were assessed. The oil and the cake, as well as the defatted flour from the variety with the highest extraction yield, were characterised for physico-chemical properties, total polyphenol content and antioxidant capacity. The oil shelf-life at 25 °C was extrapolated by Rancimat test. Andenes presented an oil yield of 22.1% (vs. 18.4% of Común), CIELAB colour coordinates of L* = 36.5, a* = 2.2, b* = 20, refractive index and density at 25 ºC of 1.469 and 0.903 g/mL, acid number of 3.2 mg KOH/g, free fatty acids content of 1.6%, peroxide number of 2.7 meqO2/kg, p-anisidine number of 1.3, unsaponificable content of 58%, total antioxidant capacity 21.4 µmol TE/g and total pol...
9
tesis de grado
Publicado 2020
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El presente trabajo de investigación tuvo como objetivo de evaluar y determinar la eficiencia del efecto de la aplicación de tres dosis de fertilizante foliar orgánico de algas marinas y su repercusión en el rendimiento y beneficio costo del cultivo de la col morada (Brassica oleracea) en el distrito de Lamas. El almacigado tuvo una duración de 21 días y con esa edad de las plántulas se efectuó la siembra definitiva, usando un distanciamiento de 40 cm entre plantas y 40 cm entre hileras. Se utilizó el diseño estadístico de Bloques Completamente al Azar (DBCA), con 3 bloques, 4 tratamientos y con un total de 12 unidades experimentales. Las dosis utilizadas fueron: T0, (Testigo), T1 (0,75 l.ha-1 de algas marinas), T2 (0,50 l.ha-1 de algas marinas) y el T3 (0,25 l.ha-1 de algas marinas). La aplicación de las dosis de las algas marinas, se realizó a la cuarta semana, después de...
10
tesis de grado
Publicado 2020
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El informe titulado “fertilizantes foliares con contenido de sílice y calcio en la producción del cultivo de la lechuga variedad Great Lakes 659 en la provincia de Lamas”, tuvo como objetivo determinar cuál de las dosis de sílice y calcio tienden a mejorar el rendimiento y el beneficio/Costo, en el cultivo de la lechuga (Lactuca sativa) variedad Great Lakes 659, se ejecutó en el fundo hortícola “El Pacífico”, de propiedad del sr. Jorge Luís Peláez Rivera a una altitud de 835 m.s.n.m.m., con un Bosque Seco Tropical (bs-T), describiendo los tratamientos en T0 testigo, T1 1000 ml.ha-1 de Viosil (Silicio), T2 500 ml.ha-1 de Promet Ca, T3 500 ml.ha-1 de Promat Ca + 1000 ml.ha-1 de Viosil (Silicio), los indicadores evaluados altura de planta, diámetro de la base del tallo, número de hojas por planta, peso de la planta, tamaño de la raíz, materia fresca y seca en raíces, m...
11
artículo
Publicado 2024
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El objetivo del estudio fue evaluar las características biológicas, fisicoquímicas y tecnológicas relacionadas del tiburón azul Prionace glauca. Se trabajó con 128 especímenes para determinar sus propiedades biológicas, tecnológicas y 27 ejemplares para sus características fisicoquímicas. Se registraron los datos biométricos de longitud y peso (142 a 281 cm y 10.5 a 93.0 kg para machos; 153.5 a 255.0 cm y 14.5 a 80.0 kg para hembras), índice de alometría (machos 3.27 y hembras 2.87), potencial tecnológico mediante diferentes tipos de rendimientos (RED: 83.9±0.03%, RESV: 67.2±0.04%, RSCV: 48.9±0.07% y RPC: 33.5±0.07%) y capacidad de retención de agua en el músculo (16.1±0.03%). Dentro de las características fisicoquímicas se analizó la composición química proximal (proteína 21.8±0.23; grasa 0.6±0.03; humedad 78.0±0.31; ceniza 1.3±0.01) y los minerales (Cu: ...
12
tesis de grado
Publicado 2021
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El informe titulado efectos de la cuyasa en dos sistemas asociados de cultivos hortícolas en el distrito de Lamas, tuvo como objetivo general la evaluación de la calidad del suelo con aplicación de cuyasa en dos sistemas de cultivos hortícolas. Se llevó a cabo en el fundo “El Pacífico”, ubicado en el distrito de Lamas, provincia de Lamas, departamento y región San Martín. La ubicación política es Latitud Sur de 06°20´15”, Longitud Oeste de 76º 30´ 45” y una Altitud de 835 m.s.n.m.m. El Diseño empleado fue Bloques Completamente al Azar con arreglo factorial 2x2 (4 tratamientos) con dos factores de estudio Factor A: Niveles de cuyasa A1: 5 t.ha-1 de cuyasa y A2: 10 t.ha-1 de cuyasa; Factor B: Sistemas de cultivo B1: Cultivo de hojas (cebolla, lechuga y culantro) y B2: Cultivo de bulbo o raíces tuberosas (rabanito, nabo y beterraga). Los indicadores evaluados fueron ...
13
artículo
Three sources of silicon in biomass production of rice (Oryza sativa L.) under controlled conditions
Publicado 2022
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A pot experiment was conducted in the campus of La Molina National Agrarian University in order to evaluate the effect of rice husk ash, ladle furnace slag and potassium silicate on the soil chemical properties and biomass of rice (Oryza sativa L.) cv. ‘Fedearroz 60’, using topsoil from a commercial paddy field at Aucayacu, Huanuco, Peru. Doses were calculated taking into consideration each product available Si (SiA), for reaching concentrations of 100, 200 and 400 ppm (w / w) of SiA in soil before sowing. Control pots without any silicon amendment were considered as well. A completely randomized design with factorial arrangement (3 × 4) was used to assess the Si absorption by plant tissues, final SiA in soils, roots volume, whole plant’s dry weight, tillering capacity, panicles per plant and average spikelets per panicle. Salinity and pH of the growing media were registered weekl...
14
tesis de grado
Publicado 2002
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In order to evaluate the Physical properties Of the Hybrid leaf of 4 of fayer tobacco for pu re in the phase of the drying under tropical conditions and to Evaluate the yield of dry matter and to detennine the cost benefit of the treatments in study, it was carried out the present work in the cured of house of Tobaccos of the Peru S. A. in Juan Guena district, County and department of San Martín, altitude 232 m. s. n. m., Longitude West 76º 30 (15", South Latitude 06º 30 (15", Tº mediatas Annual 26.3ºC and precipitation 1047 mm. lt was driven Completely under the Design ·Block. Randomized with 4 treatments and 4 repetitions. The treatment 1 that corresponds to the hybrid tobacco ª59107 x 59105", it was the one that presentad a better characteristic to be used for the layer of pure, when showing in the leaves 9.11 elasticity, 8.44 flat, 75% combustibility, 18.22% humidity, 9.8 of a...
15
tesis de grado
Publicado 2003
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With the purpose to find an alternative to improve the organic production of brown creole cotton (Gossypium barbadense L.), we carried out a trial applying barbasco extract (Lonchocarpus nicou L.) and ashes of sorne forest species for treatment of seeds and on the definitiva fields in the Bajo Mayo region of the San Martín region. The cotton seed of the variety Peruvian creole was obtained trough the previous campaign on fields cultivated by the farmers for this experience; it was installed on ground with soil of franco structure which is fit for agriculture for its balance between sand and clay (Community of Solo) and franco arcilloso, a soil with more clay (Community of San Juan), there are presenting a lightly alkaline and respectively alkaline pH. The sowing was carried out in small holes with a distance of 2.00 m by 2.00 m between the files and the holes at the rate of four seed pe...
16
tesis de grado
Publicado 2022
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La presente tesis se desarrolló en la Minera Yanacocha en la zona denominada CARACHUGO 14 en Cajamarca, Perú, con el objetivo general proponer maniobras con maquinaria para optimizar el movimiento de tierras en Carachugo 2022. Así mismo comparar estas maniobras de equipo pesado con las maniobras teóricos. Para la realización de este proyecto se recopiló información entre los meses de julio y septiembre del 2021, mediante observación directa, medición y registro en formatos de reporte diario y de control de equipos. La funcionalidad de la maquinaria pesada que se detalla en esta investigación enfocada de acuerdo al tipo de material involucrado, nombrando las limitaciones y las características que inciden en la elección de ella, según sean las propiedades del suelo en que se trabaja. Como uno de los objetivos específicos de la investigación es optimizar el movimiento de tier...
17
artículo
Publicado 2023
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The study area focuses on the Huaylilllas formation located around the city of Tacna, where no zones with potential ornamental use have been identified. A geological-geomorphological and geomechanical mapping was carried out with the aim of providing a technological and geomechanical characterization. Twenty-two geomechanical stations were conducted to obtain a characterization, revealing that the Lower Huaylillas member is poor rock and the upper member is fair to good rock. As it approaches the Millo Formation or the contact with the Lower Huaylillas, the rock's RMR quality decreases. The physical and mechanical properties of 20 samples were determined, yielding the following values: porosity (1.6-32.4%), dry density (1.5-2.3 g/cm3), absorption (0.7-20.4%), specific weight (2.0-2.5 g/cm3), and uniaxial compressive strength (7.98-91.45 MPa). Consolidated tuff with vitroclastolithic lith...
18
tesis de maestría
Actualmente, el Perú es el mayor productor y exportador de carmín de cochinilla, cuya participación global es de 85% y con un gran potencial de crecimiento, dada la tendencia de los países desarrollados de consumir productos naturales. El carmín de cochinilla como colorante natural es utilizado en diferentes industrias: la alimentaria, cosmética, farmacéutica e incluso en bebidas alcohólicas. Es preferido frente a los sintéticos, por no ser tóxico y por formar parte de la mayor demanda mundial de los productos orgánicos. Hecho que constituye una importante ventaja competitiva en base a una diferenciación del producto. En cuanto al crecimiento de las exportaciones en kilogramos, la industria del carmín de cochinilla todavía es mínima. Ha logrado un 2% en el 2014 y 3% en el 2015, porcentajes reducidos debido al desconocimiento de las propiedades naturales del carmín y tambi...
19
tesis de maestría
Actualmente, el Perú es el mayor productor y exportador de carmín de cochinilla, cuya participación global es de 85% y con un gran potencial de crecimiento, dada la tendencia de los países desarrollados de consumir productos naturales. El carmín de cochinilla como colorante natural es utilizado en diferentes industrias: la alimentaria, cosmética, farmacéutica e incluso en bebidas alcohólicas. Es preferido frente a los sintéticos, por no ser tóxico y por formar parte de la mayor demanda mundial de los productos orgánicos. Hecho que constituye una importante ventaja competitiva en base a una diferenciación del producto. En cuanto al crecimiento de las exportaciones en kilogramos, la industria del carmín de cochinilla todavía es mínima. Ha logrado un 2% en el 2014 y 3% en el 2015, porcentajes reducidos debido al desconocimiento de las propiedades naturales del carmín y tambi...
20
tesis de grado
Publicado 2022
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The project was carried out in the laboratory of organic chemistry of the Faculty of Chemical Engineering of the National University of the Peruvian Amazon, aiming to obtain biodiesel from residual domestic oil. The oil was collected from a total of 384 houses in the city of Iquitos, which was pre-treated to remove solids and moisture; to the properly treated oil some quality tests were performed, being the determination of acidity index the most important, because of that result the amount of catalyst to be used in the reaction was determined, this being 0,4173 gr NaOH per 100 ml of residual domestic oil. Subsequently, a reaction process called transesterification was performed, using 100 ml of residual domestic oil with different reaction temperatures (room temperature, 45°C and 65°C) and different volumes of methanol (20 ml, 40 ml and 60 ml), obtaining different yields of the nine c...
