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Search Results: 1 - 10 of 9461 matches for " Ronchi Cláudio Pagotto "
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Critical values of nitrogen indices in tomato plants grown in soil and nutrient solution determined by different statistical procedures
Fontes, Paulo Cezar Rezende;Ronchi, Cláudio Pagotto;
Pesquisa Agropecuária Brasileira , 2002, DOI: 10.1590/S0100-204X2002001000010
Abstract: the objective of this study was to establish critical values of the n indices, namely soil-plant analysis development (spad), petiole sap n-no3 and organic n in the tomato leaf adjacent to the first cluster (lac), under soil and nutrient solution conditions, determined by different statistical approaches. two experiments were conducted in randomized complete block design with four repli-cations. tomato plants were grown in soil, in 3 l pot, with five n rates (0, 100, 200, 400 and 800 mg kg-1) and in solution at n rates of 0, 4, 8, 12 and 16 mmol l-1. experiments in nutrient solution and soil were finished at thirty seven and forty two days after transplanting, respectively. at those times, spad index and petiole sap n-no3 were evaluated in the lac. then, plants were harvested, separated in leaves and stem, dried at 70oc, ground and weighted. the organic n was determined in lac dry matter. three statistical procedures were used to calculate critical n values. there were accentuated discrepancies for critical values of n indices obtained with plants grown in soil and nutrient solution as well as for different statistical procedures. critical values of nitrogen indices at all situations are presented.
Critical values of nitrogen indices in tomato plants grown in soil and nutrient solution determined by different statistical procedures
Fontes Paulo Cezar Rezende,Ronchi Cláudio Pagotto
Pesquisa Agropecuária Brasileira , 2002,
Abstract: The objective of this study was to establish critical values of the N indices, namely soil-plant analysis development (SPAD), petiole sap N-NO3 and organic N in the tomato leaf adjacent to the first cluster (LAC), under soil and nutrient solution conditions, determined by different statistical approaches. Two experiments were conducted in randomized complete block design with four repli-cations. Tomato plants were grown in soil, in 3 L pot, with five N rates (0, 100, 200, 400 and 800 mg kg-1) and in solution at N rates of 0, 4, 8, 12 and 16 mmol L-1. Experiments in nutrient solution and soil were finished at thirty seven and forty two days after transplanting, respectively. At those times, SPAD index and petiole sap N-NO3 were evaluated in the LAC. Then, plants were harvested, separated in leaves and stem, dried at 70oC, ground and weighted. The organic N was determined in LAC dry matter. Three statistical procedures were used to calculate critical N values. There were accentuated discrepancies for critical values of N indices obtained with plants grown in soil and nutrient solution as well as for different statistical procedures. Critical values of nitrogen indices at all situations are presented.
Fenologia da goiabeira 'Paluma' sob diferentes sistemas de cultivos, épocas e intensidades de poda de frutifica??o
Serrano, Luiz Augusto Lopes;Marinho, Cláudia Sales;Lima, Inorbert de Melo;Martins, Marlon Vagner Valentim;Ronchi, Cláudio Pagotto;Tardin, Flávio Dessaune;
Bragantia , 2008, DOI: 10.1590/S0006-87052008000300019
Abstract: the objective of this work was to evaluate the effects of different fruit pruning times and intensities on the phenology of 'paluma' guava trees in two cultivation systems, in pedro canário, espírito santo state, brazil. the experimental design was a randomized complete block in a split split plots scheme. the main plots were the cultivation systems (with and without irrigation), the split plots were the pruning times (november 10, 2005; december 9, 2005; january 13, 2006 and february 10, 2006), and the split split plots were the pruning intensities (heavy, medium and light). the period between pruning and the beginning of fruit ripening was between 182 (pruning in november and december) to 203 days (pruning in february). fruit physiologic fall continued for 56 days after termination of flowering. number of sprouts and branches were higher in irrigated plants subjected to light pruning. the largest number of fruits per branch occurred in plants subjected to light pruning in february. independently of pruning time, plants subjected to heavy pruning provided the smallest number of fruits per branch and index of fruit set. the largest fruit size was produced in irrigated plants and in plants pruned in december and january.
Goiabeira 'Paluma' sob diferentes sistemas de cultivo, épocas e intensidades de poda de frutifica??o
Serrano, Luiz Augusto Lopes;Marinho, Cláudia Sales;Ronchi, Cláudio Pagotto;Lima, Inorbert de Melo;Martins, Marlon Vagner Valentim;Tardin, Flávio Dessaune;
Pesquisa Agropecuária Brasileira , 2007, DOI: 10.1590/S0100-204X2007000600004
Abstract: the objective of this work was to evaluate the effects of different fructification pruning times and intensities on the yield and fruit quality of 'paluma' guava trees in two cultivation systems, in pedro canário, es, brazil. the experimental design was a randomized complete blocks in a split split plots scheme. the main plots were the cultivated systems (with and without irrigation), the split plots were the pruning times (november 10, 2005; december 9, 2005; january 13, 2006; and february 10, 2006), and the split split plots were the pruning intensities (heavy, medium and light). plant yield, number of harvested fruits, and fruits medium weight were higher in irrigated plants. independently of pruning time, plants subjected to heavy pruning provided the smallest yield and number of fruits per plant, however produced the higher fruit weight. the largest yield and number of fruits per plant occurred in plants subjected to medium and light pruning in february, while higher fruit weight occurred in plants pruned in december, regardless pruning intensity. total soluble solids, titratable acidity and ratio were not affected by pruning intensity; however, those characteristics were affected by cultivate systems and pruning time.
Ecophysiology of coffee growth and production
DaMatta, Fábio M.;Ronchi, Cláudio P.;Maestri, Moacyr;Barros, Raimundo S.;
Brazilian Journal of Plant Physiology , 2007, DOI: 10.1590/S1677-04202007000400014
Abstract: after oil, coffee is the most valuable traded commodity worldwide. in this review we highlighted some aspects of coffee growth and development in addition to focusing our attention on recent advances on the (eco)physiology of production in both coffea arabica and c. canephora, which together account for 99% of the world coffee bean production. this review is organized into sections dealing with (i) climatic factors and environmental requirements, (ii) root and shoot growth, (iii) blossoming synchronisation, fruiting and cup quality, (iv) competition between vegetative and reproductive growth and branch die-back, (v) photosynthesis and crop yield, (vi) physiological components of crop yield, (vii) shading and agroforestry systems, and (viii) high-density plantings.
When the Mind Affects the Heart  [PDF]
Cláudio Garcia Capit?o
Psychology (PSYCH) , 2015, DOI: 10.4236/psych.2015.616210
Abstract: This article aims to theoretically discuss the relationship between psychosomatic symptoms and heart diseases. It was used, as research technique, the narrative literature review, unsystematic, which consisted in presenting an open theme. Many authors point out the influence of the mind over the body—especially through emotions, psychic conflicts, stress—as responsible for, or adjuvants in the etiopathogenesis of many diseases. Emotions are acute emotional reactions triggered by external or internal stimuli, usually accompanied by neurodegenerative, visceral, hormonal and vascular somatic reactions. The conclusion is that heart diseases are multidetermined, influenced by environmental, organic and psychodynamic conditions.
Changes in Personality Caused by Neurocysticercosis  [PDF]
Cláudio Garcia Capit?o
Psychology (PSYCH) , 2016, DOI: 10.4236/psych.2016.71011
Abstract: This article aims to discuss theoretically changes in personality aspects caused by neurocysticercosis. An unsystematic narrative literature review aiming to present an open issue was used as research technique. Neurocysticercosis is a disease whose infestation usually depends on poor hygienic, health and education conditions. The infested patient has a lower self-esteem in addition to numerous psychological, medical and social consequences. It directly affects the ego, weakening the personality in its structure, which may cause a significant social and occupational deterioration or a deterioration of other important aspects of life.
Novos registros de Heliantheae Cass. (Asteraceae) para o Brasil
Mondin, Cláudio Augusto;
Acta Botanica Brasilica , 2007, DOI: 10.1590/S0102-33062007000400024
Abstract: four species of heliantheae (asteraceae) found in the state of rio grande do sul are first reported here for brazil: acmella psilocarpa r.k. jansen, angelphytum grisebachii (baker) h. rob., angelphytum tenuifolium (hassl.) h. rob. and viguiera nudicaulis (pers.) baker. species descriptions and illustrations are presented. additional information is provided concerning geographic distribution, habitats and phenology.
Comércio internacional e finan?as: uma análise teórico-empírica
Lucinda, Cláudio Ribeiro;
Economia Aplicada , 2008, DOI: 10.1590/S1413-80502008000300004
Abstract: this paper aims to investigate the existence of a relationship between the institutional characteristics of the credit market of a country and its degree of specialization on trade of manufactures. in order to do so, we started by formally modeling this relationship. the empirical analysis, with brazilian sectoral data for the period between 1996 and 2000, we could observe a relationship between the demand for external financing and the degree of specialization in industrial products, in accordance to the theoretical development. this relationship holds even after our robustness tests, using instrumental variables, aimed at dealing with the problems of simultaneity and reverse causality.
O valor-trabalho como fundamento dos pre?os
Gontijo, Cláudio;
Economia e Sociedade , 2009, DOI: 10.1590/S0104-06182009000300003
Abstract: this article shows that the law of value is axiomatic and constitutes the necessary foundation of the prices of production. giving up this foundation means to break with the self-found principle of science, to abandon the unifying principle of classical economics in favor of unsystematic theories based on ad hoc hypotheses and to give up on a general theory of market economies. the neo-ricardian proposal to determine prices and the profit rate directly from "technical coefficients" and the real wage omits the length of the working-day and the intensity of the labor process, concealing the sociologic contents of those variables.
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