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Use of RPA images in the mapping of the chlorophyll index of coffee plants. Author(s): SANTOS, L. M. dos; FERRAZ, G. A. e S.; CARVALHO, M. A. de F.; TEODORO, S. A.; CAMPOS, A. A. V.; MENICUCCI NETO, P. Coffee trading is an important source of income for the Brazilian commercial balance. Chlorophyll (Chl) are pigments responsible for converting radiation into energy; these pigments are closely relate... ... Repository: BDPA Publication year: 2022
Hyperspectral data analysis for chlorophyll content derivation in vineyards. Author(s): ARRUDA, D. C. de; DUCATI, J. R.; PITHAN, P. A.; HOFF, R. Quality and yield of a vineyard are related to canopy biomass and leaf vigor, and proximal techniques have been used as alternatives to conventional methods to estimate these parameters. Knowledge on... ... Repository: BDPA Publication year: 2024
Spatial variability of maximum temperature and chlorophyll in an integrated agricultural-forest system. Author(s): VENDRUSCULO, L. G.; BASSI, B.; EVARISTO, J. W. ABSTRACT. The objective of this work was to study the variability of maximum temperature and chlorophyll A in an agroforestry system using the geostatistics technique. This study was carried out in an... ... Repository: BDPA Publication year: 2021
NO3-, K+, and chlorophyll index in fertigated grapevines in the semi-arid region of Brazil. Author(s): SILVA, A. O. da; SILVA, D. J.; BASSOI, L. H.; CHAVES, A. R. de M. Evaluating the effects of N and K supply on grapevines (Vitis vinifera L.) and the techniques for nutritional diagnosis is of great importance for fertigation management of this crop. This study evalu... ... Repository: BDPA Publication year: 2023
Leaf chlorophyll index of Brachiaria brizantha cv. Piatã and Panicum maximum cv. Mombaça under different doses of nitrogen and potassium. Author(s): SALMAN, A. K. D.; BACELAR, B. M. F. S.; ALVES, E. A.; MARCOLAN, A. L.; CARARO, D. C.; OSMARI, E. K.; MENDES, A. M.; CASTILHO, D. A. da S. Repository: BDPA Publication year: 2014
Variability and genetic parameters of chlorophyll content in forage peanut genotypes using the SPAD index. Author(s): SANTOS, C. F.; ASSIS, G. M. L. de; BEBER, P. M.; MIQUELONI, D. P.; CLEMENCIO, R. de M.; SILVA, R. S. da This study aimed to verify the existence of variability and to estimate genetic parameters for chlorophyll content in forage peanut genotypes. Repository: BDPA Publication year: 2016
Calibration of chlorophyll hand-held meter based on vineyard NDVI zones for estimation of leaf N content. Author(s): SILVA, T. M. M. da; COSTA, B. R. S.; OLDONI, H.; FOSCHINI, M. M.; BASSOI, L. H. The monitoring of chlorophyll content in grapevine leaves allows us to evaluate their N status, assisting with the information for the decision make about nutrient rate and application time to the vin... ... Repository: BDPA Publication year: 2022
Portable chlorophyll meter can estimate the nitrogen sufficiency index and levels of topdressing nitrogen in common bean. Author(s): SILVEIRA, P. M. da; GONZAGA, A. C. de O. The nitrogen sufficiency index (NSI) obtained by using a portable chlorophyll meter is a practical alternative to evaluate the N levels in plants. This study aimed at determining the appropriate NSI v... ... Repository: BDPA Publication year: 2017
Seasonal changes in levels of chlorophyll, nitrate and total soluble carbohydrates of brachiaria decumbens in a long-term silvopastoral system. Author(s): LIMA, M. A.; PACIULLO, D. S. C.; NUNES-NESI, A.; ARAÚJO, W. L.; MORENZ, M. J. F.; LELIS, D. L.; MARTINS, A. O.; GOMIDE, C. A. de M.; RODRIGUES, R. de A. R.; CHIZZOTTI, F. H. M. Our objective was to quantify the levels of chlorophyll (Chl), nitrate and total soluble carbohydrates in leaf blades of Brachiaria decumbens grown in the understory of a silvopastoral system (SPS) un... ... Repository: BDPA Publication year: 2021
Influence of nutrient levels, travel time and light availability on phytoplankton chlorophyll-a concentrations in a neotropical river basin. Author(s): ROCHE, K. F.; FERREIRA, M. G. A.; CALHEIROS, D. F. Abstract: Aim: Knowledge of the factors influencing the biomass of phytoplankton in rivers is important with reference to the characterization of water quality and predicting the effects of environmen... ... Repository: BDPA Publication year: 2022

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