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Romina de Souza
University of Almería
CropPepperChlorophyllNitrogenAgronomy
4Publications
2H-index
17Citations
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Publications 8
Newest
#1Alejandra Lobo Rodríguez (UCR: University of Costa Rica)
#2M. Teresa Peña-Fleitas (UAL: University of Almería)H-Index: 6
Last. Rodney B. Thompson (UAL: University of Almería)H-Index: 25
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Abstract Intensive vegetable production in soil is often associated with large N losses to the environment. To contribute to improved N management of sweet pepper, this work developed a critical nitrogen curve (CNC). It also developed N recommendations and examined N use efficiency (NUE) and potential NO3− leaching loss in relation to increasing total available nitrogen (TAN). TAN is the sum of the soil mineral N at planting, N mineralized from soil organic material, and mineral N fertilizer. Th...
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#1Marisa Gallardo (UAL: University of Almería)H-Index: 21
#2Francisco M. Padilla (UAL: University of Almería)H-Index: 22
Last. Rodney B. Thompson (UAL: University of Almería)H-Index: 25
view all 6 authors...
Abstract Intensive vegetable production in soil is commonly associated with low N use efficiency (NUE) and consequently appreciable N losses that have negative environmental impacts. Improved N management practices for intensive vegetable crops require detailed knowledge of crop response to N supply. This study evaluated the effects of increasing total available N (TAN, i.e. the sum of soil mineral N at planting, N mineralized from organic matter, and mineral fertilizer N applied by fertigation)...
1 CitationsSource
#1Romina de SouzaH-Index: 2
Last. Francisco M. PadillaH-Index: 22
view all 5 authors...
Source
#1Romina de SouzaH-Index: 2
#2Rafael GrassoH-Index: 1
Last. Francisco M. PadillaH-Index: 22
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Optical sensors can be used to assess crop N status to assist with N fertilizer management. Differences between cultivars may affect optical sensor measurement. Cultivar effects on measurements made with the SPAD-502 (Soil Plant Analysis Development) meter and the MC-100 (Chlorophyll Concentration Meter), and of several vegetation indices measured with the Crop Circle ACS470 canopy reflectance sensor, were assessed. A cucumber (Cucumis sativus L.) crop was grown in a greenhouse, with three culti...
1 CitationsSource
#1Romina de SouzaH-Index: 2
Last. Francisco M. PadillaH-Index: 22
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Chlorophyll meters are promising tools for improving the nitrogen (N) management of vegetable crops. To facilitate on-farm use of these meters, sufficiency values that identify deficient and sufficient crop N status are required. This work evaluated the ability of three chlorophyll meters (SPAD-502, atLEAF+, and MC-100) to assess crop N status in sweet pepper. It also determined sufficiency values for optimal N nutrition for each meter for pepper. The experimental work was conducted in a greenho...
Source
#1Francisco M. Padilla (UAL: University of Almería)H-Index: 22
#2Romina de Souza (UAL: University of Almería)H-Index: 2
Last. Richard B. Thompson (UAL: University of Almería)H-Index: 25
view all 6 authors...
Optical sensors are a promising approach for assessing nitrogen (N) status of vegetable crops. However, their potential may be undermined if time of day influences measurements. This study evaluated the effects of time of day and N addition on measurements, made with two chlorophyll meters, SPAD-502 and MC-100, and two active canopy reflectance sensors, GreenSeeker handheld and Crop Circle ACS-470. Three treatments (N1, deficient, N2, conventional, and N3, excessive N application) of N concentra...
1 CitationsSource
#1Francisco M. Padilla (UAL: University of Almería)H-Index: 22
#2Romina de Souza (UAL: University of Almería)H-Index: 2
Last. Richard B. Thompson (UAL: University of Almería)H-Index: 25
view all 6 authors...
Intensive vegetable production is commonly associated with excessive nitrogen (N) fertilization and associated environmental problems. Monitoring of crop N status can enhance crop N management. Chlorophyll meters (CMs) could be used to monitor crop N status because leaf chlorophyll (chl) content is strongly related to crop N status. To monitor crop N status, relationships between CM measurements and leaf chl content require evaluation, particularly when excessive N is supplied. The SPAD-502 mete...
5 CitationsSource
#2Marisa GallardoH-Index: 21
Last. Richard B. ThompsonH-Index: 25
view all 5 authors...
11 CitationsSource
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