5 documents found, page 1 of 1
Infravermelho portátil na região do próximo (NIR) aplicado no controle de quali...
Correia,Radigya M.; Cunha,Pedro H.; Agnoletti,Bárbara Z.; Pereira,Lucas L.; Partelli,Fábio L.; Filgueiras,Paulo R.; Lacerda Jr.,ValdemarThe objective of this work was to control the purity level of canephora coffees (Conilon coffee) from the state of Espírito Santo (Brazil), as a function of the addition of grounds produced by the coffees themselves using a portable microspectrometer in the infrared region. (microNIR), associated with chemometric tools. The PCA model grouped the coffees according to the level of adulterant in the samples and sh...
Variability and spatial correlation of soil micronutrients and organic matter w...
Paris,Jaqueline O.; Gontijo,Ivoney; Partelli,Fábio L.; Facco,Alexandro G.ABSTRACT Soil fertility is the key to agricultural production. The spatial correlation and location of nutrients may significantly affect the yields. The objective of this work was to evaluate the variability and spatial correlation of iron (Fe), copper (Cu), manganese (Mn), zinc (Zn), and organic matter (OM) with macadamia nut yield. The study was conducted in an Oxisol cultivated for 20 years with macadamia n...
Nutritional balance and its relationship to yield in a coffee field: Inferences...
Silva,Marcelo B. da; Partelli,Fábio L.; Gontijo,Ivoney; Caldas,Marcellus M.ABSTRACT Information obtained from studies of spatial variability and the Diagnosis and Recommendation Integrated System (DRIS) may contribute to understanding better the relationship between mineral nutrient balance and factors that limit the crop yield. This study shows that nutritionally balanced plants may be associated with low productivity in Conilon coffee fields. The study was carried out on a highly pr...
Determination of homogeneous zones for liming recommendations of black pepper u...
Gontijo,Ivoney; Santos,Eduardo O. de J.; Partelli,Fábio L.; Gontijo,Andreia B. P. L.; Pires,Fábio R.ABSTRACT Studies aimed at determining homogeneous zones and the spatial variability of soil characteristics may improve the efficiency of agricultural input applications. The purpose of this study was to determine homogeneous zones for liming applications and to characterize the spatial variability of characteristics related to soil acidity and productivity in an Oxisol cultivated with black pepper (Piper nigru...
Produtividade do feijoeiro comum influenciada por plantas de cobertura e sistem...
Ferreira,Enderson P. de B.; Stone,Luís F.; Partelli,Fábio L.; Didonet,Agostinho D.Conduziu-se um experimento de campo sob sistema plantio direto (SPD) e sistema de plantio convencional (SPC) para avaliar a produção de massa seca, a quantidade de N e a taxa de decomposição de crotalária (Crotalaria juncea) e sorgo forrageiro (Sorghum bicolor L.), e seus efeitos na produtividade do feijoeiro comum (Phaseolus vulgaris L.). O sistema de manejo do solo não influenciou na produtividade de massa se...