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Mostrando ítems 1-18 de 18

    • Assessing soil P fractions changes with long‐term phosphorus fertilization related to crop yield of soybean and maize 

      Appelhans, Stefania Carolina; Barbagelata, Pedro Anibal; Melchiori, Ricardo Jose; Gutierrez Boem, Flavio Hernán (Wiley, 2020-02)
      Long-term P fertilization increases soil phosphorus (P) labile fractions, which can be associated with crop P uptake and grain yield and are useful to improve fertilizer recommendations. Research aims were to evaluate in ...

    • Crop nitrogen status of early- and late-sown maize at different plant densities 

      Maltese, Nicolás; Maddonni, Gustavo Angel; Melchiori, Ricardo Jose; Ferreyra, Juan Matías; Caviglia, Octavio (Elsevier, 2020)
      In maize (Zea mays L.) crops, nitrogen (N) status at silking (R1) has been used to predict grain yield (GY) response to N fertilization and to develop strategies to manage crop nutrition in order to match N supply with ...

    • Crop sequence and P fertilization effects on soil P fractions under no-tillage 

      Appelhans, Stefania Carolina; Novelli, Leonardo Esteban; Melchiori, Ricardo Jose; Gutierrez Boem, Flavio Hernán; Caviglia, Octavio (Springer, 2021-05-27)
      Increasing cropping intensity may affect phosphorus (P) recycling through crop residue inputs, which may differ in soils with different productivity, P adsorption capacity, and P fertilization level. In three crop sequences: ...

    • Development and evaluation of an automatic software for management zone delineation 

      Albornoz, Enrique Marcelo; Kemerer, Alejandra Cecilia; Galarza, Romina; Mastaglia, Nicolás; Melchiori, Ricardo Jose; Martínez, César Ernesto (2018-06)
      The lack of availability of user-friendly and automatic software for management zone delineation is limiting the adoption of site-specific management practices. Several procedures for management zone delineation have been ...

    • Does the fertilisation strategy affect the long-term legacy phosphorus dynamic? 

      Appelhans, Stefania Carolina; Novelli, Leonardo Esteban; Melchiori, Ricardo Jose; Barbagelata, Pedro Anibal (Elsevier, 2024-02)
      Phosphorus (P) imbalances in agricultural systems are a global problem because they have environmental and economic impacts, like eutrophication when there is a soil P surplus and low crop productivity in P deficient soils. ...

    • Improving resource productivity at a crop sequence level 

      Caviglia, Octavio; Rizzalli, Roberto H.; Monzon, Juan Pablo; Garcia, Fernando; Melchiori, Ricardo Jose; Martinez, Juan José; Cerrudo, Aníbal Alejandro; Irigoyen, Andrea Inés; Barbieri, Pablo; Van Opstal, Natalia Veronica; Andrade, Fernando Hector (Elsevier, 2019-04)
      The challenge to increase agricultural production with a minimum environmental impact requires to reach the maximum efficiency in the capture and use of resources such as photosynthetically active radiation (PAR), water, ...

    • Is the lack of response of maize to fertilization in soils with low Bray1-p related to labile organic phosphorus? 

      Appelhans, Stefania Carolina; Barbagelata, Pedro Anibal; Melchiori, Ricardo Jose; Gutierrez Boem, Flavio Hernán (Springer, 2021-01-07)
      The usual soil test phosphorus (P) neglects the P supply from labile organic P (Po) fractions, which could explain the nonresponse of maize (Zea mays L.) in sites with soil P testing below the critical level. We aim to ...

    • Limitantes nutricionales y variabilidad espacio-temporal del rendimiento en colza 

      Melchiori, Ricardo Jose; Coll, Leonardo; Albarenque, Susana; Pautasso, Juan Manuel; Kemerer, Alejandra Cecilia (2018-04)
      La información agronómica desarrollada para el cultivo de colza es aún escasa en Argentina. Analizar el efecto de las limitantes nutricionales y de propiedades físicas sobre la variación espacial del rendimiento de colza ...

    • Nitrogen economy of early and late-sown maize crops 

      Maltese, Nicolás; Melchiori, Ricardo Jose; Maddonni, Gustavo Angel; Ferreyra, J.M.; Caviglia, Octavio (Elsevier, 2018-11)
      Late sowing dates of maize are widely adopted in the Pampas region of Argentina, stabilising grain yields due to a more favourable water balance around flowering. However, late-sown crops are exposed to high soil N ...

    • Nitrogen utilization efficiency in maize as affected by hybrid and N rate in late-sown crops 

      Caviglia, Octavio; Melchiori, Ricardo Jose; Sadras, Victor Oscar (2014-11)
      After the introduction of Bt-maize, late sowing is becoming an important strategy to stabilize yields in many areas of the Argentine Pampas. Increased nitrogen (N) availability and sharp reduction in radiation and temperature ...

    • Nitrógeno incubado en anaerobiosis y su relación con el nitrógeno orgánico en diferentes fracciones = Mineralizable nitrogen in anaerobiosis and its relationship with different organic n pools 

      Gregorutti, Viviana Carolina; Novelli, Leonardo Esteban; Melchiori, Ricardo Jose; Ormaechea, María Valeria; Caviglia, Octavio (Asociación Argentina de la Ciencia del Suelo, 2014-07)
      Los diagnósticos de fertilidad nitrogenada usualmente utilizados no contemplan el aporte de la fracción orgánica del suelo. El nitrógeno (N) incubado en anaerobiosis (Nan), al igual que otras fracciones lábiles del N puede ...

    • Plant emergence and maize (Zea mays L.) yield across multiple farmers’ fields 

      Albarenque, Susana; Basso, Bruno; Davidson, O.; Maestrini, B.; Melchiori, Ricardo Jose (Elsevier, 2023-10)
      Context: Uneven crop stands result from natural variation in emergence time that is related to soil moisture and temperature, and variation of within-row plant-to-plant distance caused during planting operations. Understanding ...

    • Plant nitrogen status at flowering and kernel set efficiency in early- and late-sown maize crops 

      Maltese, Nicolás; Maddonni, Gustavo Angel; Melchiori, Ricardo Jose; Caviglia, Octavio (Elsevier, 2021-08)
      In maize (Zea mays, L.) genotypic variability in the relationship between total kernel number per plant (KNP) and plant growth rate (PGR) during the period bracketing silking (R1 ± 15 d), and in kernel set efficiency (KNP ...

    • Predicting soil test phosphorus decrease in non-P-fertilized conditions 

      Appelhans, Stefania Carolina; Carciochi, Walter Daniel; Correndo, Adrián A.; Gutierrez Boem, Flavio Hernán; Salvagiotti, Fernando; García, Fernando O.; Melchiori, Ricardo Jose; Barbagelata, Pedro Anibal; Ventimiglia, Luis Alberto; Ferraris, Gustavo Nestor; Vivas, Hugo Silverio; Caviglia, Octavio; Ciampitti, Ignacio A. (Wiley, 2020-02)
      Monitoring the availability of phosphorus (P) in soil under continuous cropping facilitates finding deficiency in crops and contributes to improving crop growth and nutrient management models. Soil P availability for crops ...

    • Spatio-Temporal Nitrogen Fertilizer Response in Maize: Field Study and Modeling Approach 

      Albarenque, Susana; Basso, Bruno; Caviglia, Octavio; Melchiori, Ricardo Jose (American Society of Agronomy, 2016)
      Maize (Zea mays L.) yield and its response to nitrogen (N) are affected by the spatial variability of the interaction between weather, management, and soil properties. The objectives of this study were (i) to evaluate the ...

    • Stover quality and soil organic carbon in long-term nitrogen-fertilized maize 

      Melchiori, Ricardo Jose; Novelli, Leonardo Esteban; Gregorutti, Viviana Carolina; Caviglia, Octavio (Alliance of Crop, Soil, and Environmental Science Societies, 2014-09)
      Nitrogen fertilization often increases maize (Zea mays L.) grain yield but reduces the C/N ratio of stover returned to the soil, which may affect the soil organic carbon (SOC) balance. This study evaluated the long-term ...

    • The allometric relationships between biomass and nitrogen of vegetative organs affect crop N status in maize at silking stage 

      Maltese, Nicolás; Maddonni, Gustavo Angel; Melchiori, Ricardo Jose; Ciampitti, Ignacio A.; Caviglia, Octavio (Elsevier, 2023-04)
      In maize (Zea mays, L.) changes in the partitioning of biomass (W) and nitrogen (N) between organs linked to photosynthetically active tissues, such as leaves (with high N concentration, %N) and organs related to supporting ...

    • Water and solar radiation productivity of double-crops in a humid temperate area 

      Van Opstal, Natalia Veronica; Caviglia, Octavio; Melchiori, Ricardo Jose (Southern Cross Publishing, 2011-12)
      The intensification of agricultural systems including sequential double-crops provides a reliable platform to increase the water and solar radiation use in many humid temperate areas of South America, which are predominantly ...