L. Lázaro - Academia.edu (original) (raw)
Papers by L. Lázaro
Revista de la Facultad de Ciencias Agrarias, Universidad Nacional de Cuyo, 2016
Parametrización del modelo CROPGRO-soybean y su uso como herramienta para evaluar el impacto del ... more Parametrización del modelo CROPGRO-soybean y su uso como herramienta para evaluar el impacto del cambio climático sobre el cultivo de soja Parameterization of CROPGRO-soybean model and its use as a tool to assess the impact of climate change on the soybean crop
Agriscientia, 2004
En siembra directa (SD) temprana de soja, la bio-fertilizacion permite mayores rendimientos que e... more En siembra directa (SD) temprana de soja, la bio-fertilizacion permite mayores rendimientos que en labranza convencional. Poco se sabe del comportamiento en siembras tardias. El objetivo del trabajo fue estudiar el efecto de los sistemas de labranza y la inoculacion, en condiciones de siembra tardia y suelo con rizobios.El experimento se realizo en Azul (Buenos Aires, Argentina), y la siembra fue el 29/12/00. El tratamiento principal consistio en sistemas de labranza: i) arado de reja y vertedera, ii) escarificador de cincel y iii) SD; el subtratamiento: inoculacion (sin Bradyrhizobium japonicum —E109— y con este). El crecimiento temprano del cultivo fue 13 % mayor en los sistemas con remocion de suelo que en SD. Sin embargo, el rapido incremento en el porcentaje de intercepcion producido en SD, al inicio del periodo reproductivo permitio que, entre R3 y R6, la tasa de crecimiento del cultivo fuese similar entre sistemas. No se detectaron diferencias entre tratamientos en el numero ...
Journal of soil science and plant nutrition, 2012
Cereal Research Communications, 2019
Waterlogging stress frequently affects wheat production in the current conditions. The aim of thi... more Waterlogging stress frequently affects wheat production in the current conditions. The aim of this work was to evaluate the effect of waterlogging during grain filling on grain yield components, nitrogen uptake and partitioning and gluten composition and quality in bread wheat. Two greenhouse experiments were conducted under contrasting environmental conditions in Azul, Buenos Aires, in a completely randomized design with three replicates. The cultivar chosen was Klein León and the waterlogging treatment was imposed from 5 days after anthesis to maturity. The effects of waterlogging during grain filling in wheat depended on explored environmental conditions: early sowing vs. late sowing. Waterlogging had not significant effects on the most variables at early sowing conditions. However, the delaying in sowing date (higher temperature and radiation) enhance the effects of waterlogging: i) reducing grain weight by 41% and total nitrogen uptake by 51%; ii) reducing the ratio between the contents of high and low molecular weight glutenin subunits, affecting gluten composition; and iii) increasing the sodium dodecyl sulfate test from 79 to 108 mm, which correlates positively with the gluten strength. Reductions in grain weight due to waterlogging during grain filling affect the milling quality, although changes in protein composition may increase or maintain the gluten strength (SDSS) under particular conditions.
Intercroping a summer crop (usually soybean) in wheat requires the latter to be seeded with dista... more Intercroping a summer crop (usually soybean) in wheat requires the latter to be seeded with distant rows The aim of this work was to estimate potential yield of wheat (i.e. yield with no limitations of water or nutrients) with conventional and distant row seedings, with parallel (running East-West) or perpendicular (North-South) to solar direction rows. The crop with distant rows parallel to solar direction would not manage to intercept all the available PAR (photosynthetically active radiation), whereas it would do it in perpendicular rows With perpendicular rows potential yield would not be reduced, whereas 15-20% smaller yields (with 14% humidity) are to be expected with parallel rows Field data from Tandil showed that the maximum value of intercepted PAR with distant rows parallel to the sun did not exceed 65%. in agreement with our estimates. brought to you by CORE View metadata, citation and similar papers at core.ac.uk provided by FAUBA Digital: Repositorio institucional científico y académico de la Facultad de...
Revista De La Facultad De Ciencias Agrarias, 2016
Prior to their use in decision-making, crop models need to be calibrated with field data from the... more Prior to their use in decision-making, crop models need to be calibrated with field data from the region where the model will be used. The objectives of this...
Journal of Cleaner Production, 2021
This study investigates the activation of sewage sludge char through partial oxidation with molec... more This study investigates the activation of sewage sludge char through partial oxidation with molecular oxygen with the goal to increase the concentration of oxygen-containing surface functional groups and to enhance its ammonium adsorption capacity. The effects of oxidation temperature (200e350 C), oxygen concentration (5e21 vol %) and oxidation time (30e120 min) on the degree of char oxidation are analyzed. The results obtained by thermogravimetric and elemental analysis, and Fourier Transform Infrared and X-ray Photoelectron spectroscopy corroborate the incorporation of oxygenated functional groups on the surface of sewage sludge char either at low temperature (200 C) using air or at higher temperature (350 C) using 5% O 2 for 30 min. The oxidation of sewage sludge char hardly increases its specific surface area. The operating conditions during oxidation must be carefully controlled to avoid runaway reactions that lead to total oxidation of char. The evolution of CO and CO 2 during oxidation is a good indicator of the advance of the oxidation/burn-off reactions. The ammonium adsorption capacity of sewage sludge char increases after oxidation under mild operating conditions, providing support to the idea of onsite utilization of sewage sludge as ammonium adsorbent in waste water treatment plants. This would provide a step forward towards the implementation of a circular economy.
Revista de la Facultad de Ciencias Agrarias, Universidad Nacional de Cuyo, 2016
Parametrización del modelo CROPGRO-soybean y su uso como herramienta para evaluar el impacto del ... more Parametrización del modelo CROPGRO-soybean y su uso como herramienta para evaluar el impacto del cambio climático sobre el cultivo de soja Parameterization of CROPGRO-soybean model and its use as a tool to assess the impact of climate change on the soybean crop
Agriscientia, 2004
En siembra directa (SD) temprana de soja, la bio-fertilizacion permite mayores rendimientos que e... more En siembra directa (SD) temprana de soja, la bio-fertilizacion permite mayores rendimientos que en labranza convencional. Poco se sabe del comportamiento en siembras tardias. El objetivo del trabajo fue estudiar el efecto de los sistemas de labranza y la inoculacion, en condiciones de siembra tardia y suelo con rizobios.El experimento se realizo en Azul (Buenos Aires, Argentina), y la siembra fue el 29/12/00. El tratamiento principal consistio en sistemas de labranza: i) arado de reja y vertedera, ii) escarificador de cincel y iii) SD; el subtratamiento: inoculacion (sin Bradyrhizobium japonicum —E109— y con este). El crecimiento temprano del cultivo fue 13 % mayor en los sistemas con remocion de suelo que en SD. Sin embargo, el rapido incremento en el porcentaje de intercepcion producido en SD, al inicio del periodo reproductivo permitio que, entre R3 y R6, la tasa de crecimiento del cultivo fuese similar entre sistemas. No se detectaron diferencias entre tratamientos en el numero ...
Journal of soil science and plant nutrition, 2012
Cereal Research Communications, 2019
Waterlogging stress frequently affects wheat production in the current conditions. The aim of thi... more Waterlogging stress frequently affects wheat production in the current conditions. The aim of this work was to evaluate the effect of waterlogging during grain filling on grain yield components, nitrogen uptake and partitioning and gluten composition and quality in bread wheat. Two greenhouse experiments were conducted under contrasting environmental conditions in Azul, Buenos Aires, in a completely randomized design with three replicates. The cultivar chosen was Klein León and the waterlogging treatment was imposed from 5 days after anthesis to maturity. The effects of waterlogging during grain filling in wheat depended on explored environmental conditions: early sowing vs. late sowing. Waterlogging had not significant effects on the most variables at early sowing conditions. However, the delaying in sowing date (higher temperature and radiation) enhance the effects of waterlogging: i) reducing grain weight by 41% and total nitrogen uptake by 51%; ii) reducing the ratio between the contents of high and low molecular weight glutenin subunits, affecting gluten composition; and iii) increasing the sodium dodecyl sulfate test from 79 to 108 mm, which correlates positively with the gluten strength. Reductions in grain weight due to waterlogging during grain filling affect the milling quality, although changes in protein composition may increase or maintain the gluten strength (SDSS) under particular conditions.
Intercroping a summer crop (usually soybean) in wheat requires the latter to be seeded with dista... more Intercroping a summer crop (usually soybean) in wheat requires the latter to be seeded with distant rows The aim of this work was to estimate potential yield of wheat (i.e. yield with no limitations of water or nutrients) with conventional and distant row seedings, with parallel (running East-West) or perpendicular (North-South) to solar direction rows. The crop with distant rows parallel to solar direction would not manage to intercept all the available PAR (photosynthetically active radiation), whereas it would do it in perpendicular rows With perpendicular rows potential yield would not be reduced, whereas 15-20% smaller yields (with 14% humidity) are to be expected with parallel rows Field data from Tandil showed that the maximum value of intercepted PAR with distant rows parallel to the sun did not exceed 65%. in agreement with our estimates. brought to you by CORE View metadata, citation and similar papers at core.ac.uk provided by FAUBA Digital: Repositorio institucional científico y académico de la Facultad de...
Revista De La Facultad De Ciencias Agrarias, 2016
Prior to their use in decision-making, crop models need to be calibrated with field data from the... more Prior to their use in decision-making, crop models need to be calibrated with field data from the region where the model will be used. The objectives of this...
Journal of Cleaner Production, 2021
This study investigates the activation of sewage sludge char through partial oxidation with molec... more This study investigates the activation of sewage sludge char through partial oxidation with molecular oxygen with the goal to increase the concentration of oxygen-containing surface functional groups and to enhance its ammonium adsorption capacity. The effects of oxidation temperature (200e350 C), oxygen concentration (5e21 vol %) and oxidation time (30e120 min) on the degree of char oxidation are analyzed. The results obtained by thermogravimetric and elemental analysis, and Fourier Transform Infrared and X-ray Photoelectron spectroscopy corroborate the incorporation of oxygenated functional groups on the surface of sewage sludge char either at low temperature (200 C) using air or at higher temperature (350 C) using 5% O 2 for 30 min. The oxidation of sewage sludge char hardly increases its specific surface area. The operating conditions during oxidation must be carefully controlled to avoid runaway reactions that lead to total oxidation of char. The evolution of CO and CO 2 during oxidation is a good indicator of the advance of the oxidation/burn-off reactions. The ammonium adsorption capacity of sewage sludge char increases after oxidation under mild operating conditions, providing support to the idea of onsite utilization of sewage sludge as ammonium adsorbent in waste water treatment plants. This would provide a step forward towards the implementation of a circular economy.