The evaluation of leaf area is required in several agronomic studies given their importance to assess the plant growth. The objective of this study was to use statistical models to estimate leaf area of five clonal varieties of coffee (Coffea canephora) from linear dimensions (length and width maximum). Were used in the studies five varieties of Coffea canephora Pierre ex Froehner: Emcapa 8111, Emcapa 8121 Emcapa 8131, Emcapa 8141 and at Incaper 8142. The results obtained in this study allow us to conclude that the linear model expresses the best estimate of leaf area. Among the different independent variables adopted, the product of length and greatest width (L.W) was found to be the greatest significance and higher coefficients of determination (R 2 ). The regression equation that best expresses the estimated leaf area for the five clonal varieties is i = 0.6723 + 0.6779 x i , where x i represents the product of the greatest length and the greatest width of the leaves. RESUMO -A mensuração da área foliar é requerida em vários estudos agronômicos, em função de sua importância para avaliar o crescimento das plantas. O objetivo deste trabalho foi utilizar modelos estatísticos, para estimar a área foliar de cinco variedades clonais de café (Coffea canephora), a partir das dimensões lineares (comprimento e largura máximos) do limbo foliar. Foram utilizadas nos estudos cinco variedades de Coffea canephora Pierre ex Froehner: Emcapa 8111, Emcapa 8121, Emcapa 8131, Emcapa 8141 e Incaper 8142. Os resultados alcançados neste estudo permitem concluir que o modelo linear expressa melhor a estimativa de área foliar. Dentre as diferentes variáveis independentes adotadas, o retângulo circunscrito à folha (C.L) foi a que proporcionou maiores significâncias e maiores coeficientes de determinação (R 2 ). A equação de regressão que melhor expressa a estimativa da área foliar para as cinco variedades clonais é: i = 0,6723 + 0,6779 x i ; em que x i representa o produto entre o maior comprimento e a maior largura do limbo foliar.Palavras-chave: Coffea canephora. Dimensão foliar. Método não destrutivo. Rev. Ciênc. Agron., v. 46, n. 4, p. 740-748, out-dez, 2015 741 E. R. Schmildt et al.

ABSTRACT-Obtaining leaf area is critical in several agronomic studies, being one of the important instruments to assess plant growth. The aim of this study was to estimate equations and select the most appropriate in determining leaf area in litchi (Litchi chinensis Sonn.). From the linear dimensions of length (L) and maximum width (W) of leaf limb, equations were estimated using linear, quadratic, potential and exponential models. The linear regression equation using the product of the length by maximum width, given by Ŷ = 0.2885 + 0.662 (L.W) is the one that best expresses the leaf area estimation of litchi tree. Index terms: Litchi chinensis Sonn., leaf dimension, non-destructive method. ESTIMATIVA DA ÁREA FOLIAR EM LICHIEIRA POR MEIO DE RELAÇÕES ALOMÉTRICASRESUMO -A obtenção da área foliar é fundamental em vários estudos agronômicos, sendo um dos importantes instrumentos que avaliam o crescimento de uma planta. O objetivo do trabalho foi estimar equações e selecionar a mais apropriada na determinação não destrutiva da área foliar em Lichieira (Litchi chinensis Sonn.). A partir das dimensões lineares de comprimento (C) e largura máxima (L) do limbo foliar, as equações foram estimadas para os modelos linear, quadrático, potência e exponencial. A equação de regressão linear simples, utilizando o produto do comprimento pela máxima largura, dada por Ŷ = 0,2885 + 0,662 (C.L), é a que melhor expressa a estimativa da área foliar de Lichieira. Termos para indexação: Litchi chinensis Sonn., dimensão foliar, método não destrutivo.

RESUMO Comparison of methods for classification of the coefficient of variation in papaya 1The objective of this work was to study the distribution of values of the coefficient of variation (CV) in the experiments of papaya crop (Carica papaya L.) by proposing ranges to guide researchers in their evaluation for different characters in the field. The data used in this study were obtained by bibliographical review in Brazilian journals, dissertations and thesis. This study considered the following characters: diameter of the stalk, insertion height of the first fruit, plant height, number of fruits per plant, fruit biomass, fruit length, equatorial diameter of the fruit, pulp thickness, fruit firmness, soluble solids and internal cavity diameter, from which, value ranges were obtained for the CV values for each character, based on the methodology proposed by Garcia, Costa and by the standard classification of Pimentel-Gomes. The results obtained in this study indicated that ranges of CV values were different among various characters, presenting a large variation, which justifies the necessity of using specific evaluation range for each character. In addition, the use of classification ranges obtained from methodology of Costa is recommended.Objetivou-se com esta pesquisa avaliar a distribuição dos valores de coeficiente de variação (CV) de experimentos com a cultura do mamoeiro (Carica papaya L.), propondo faixas que orientem os pesquisadores na avaliação de seus estudos para diferentes caracteres a campo. Os dados utilizados foram obtidos por revisão bibliográfica em periódicos, dissertações e teses nacionais. Foram considerados os caracteres diâmetro do caule, altura de inserção do primeiro fruto, altura da planta, número de frutos por planta, biomassa de frutos, comprimento de fruto, diâmetro equatorial de fruto, espessura de polpa, firmeza de fruto, sólidos solúveis e diâmetro da cavidade interna, dos quais foram obtidas faixas de valores de CV para cada caractere com base nas metodologias propostas por Garcia, por Costa, e na classificação padrão de Pimentel-Gomes. Os resultados obtidos indicaram que faixas de valores de CV diferiram entre as diversos caracteres apresentando ampla variação, justificando a necessidade de utilizar faixa de avaliação específica para cada caractere e, que se recomenda o uso das faixas de classificação obtidas a partir da metodologia de Costa. Palavras-chaves:Carica papaya L., experimentação, precisão experimental.

No abstract

RESUMOEvaluating the quality of scions is extremely important and it can be done by characteristics of shoots and roots. This experiment evaluated height of the aerial part, stem diameter, number of leaves, petiole length and length of roots of papaya seedlings. Analyses were performed from a blank trial with 240 seedlings of "Golden Pecíolo Curto". The determination of the optimum plot size was done by applying the methods of maximum curvature, maximum curvature of coefficient of variation and a new proposed method, which incorporates the bootstrap resampling simulation to the maximum curvature method. According to the results obtained, five is the optimal number of seedlings of papaya "Golden Pecíolo Curto" per plot. The proposed method of bootstrap simulation with replacement provides optimal plot sizes equal or higher than the maximum curvature method and provides same plot size than maximum curvature method of the coefficient of variation.

, apresentou-se como o melhor para a produção de mudas do mamoeiro 'THB', desaconselhando-se o uso do esterco de galinha na mistura com substrato. A aplicação do fertilizante superfosfato simples não melhorou a qualidade das mudas em relação ao padrão. Termos para indexação: Carica papaya L., esterco de galinha, superfosfato simples. ORGANIC AND MINERAL FRACTIONS IN THE PRODUCTION OF PAPAYA SEEDLINGSABSTRACT -The objective of this study was to evaluate the effect of different dosage of chicken manure associated with the superphosphate fertilizer, replacing the formulation used in the north of Espírito Santo, the production of 'THB' papaya seedlings. The experiment was conducted in an agricultural nursery, of the Company Caliman Agricola SA, in Linhares-ES in randomized block design in a factorial 5x5 (superphosphate: 0, 5, 10, 15, 20 kg m -3 x chicken manure: 0, 10, 20, 30, 40% v / vt) with additional witness consisting of the standard mixture used in the region with 3M ® mini Basacote fertilizer, NPK (mg) 13-06-16 (1.4) with micronutrients (10% S, 0.05% Cu, 0.26% Mn, 0.015% Mo) at a dosage of 10 kg m -3 , with 4 repetitions. The substrate was Bioplant ® . It was evaluated the % of emergency, the emergency speed index and the emergency average time, the rate of chlorophyll content, seedling height, stem diameter, leaf number, root length, dry mass of roots and shoot. It is concluded that the standard treatment of substrate and fertilizer Basocote Bioplant ® , presented itself as the best for production of 'THB' papaya seedlings and discouraged the use of chicken manure mixed with the substrate. The application of superphosphate fertilizer did not improve the quality of the seedlings from the default.

-Introduction. Papaya is one of the very few fruit crops multiplied by seed. Unfortunately, the use of seedlings hampers the preservation of favorable plant characteristics and delays the appearance of the first flowers. In addition, the polygamous nature of papaya imposes planting 3-4 seedlings per hole in order to be certain of obtaining the right sex type. These shortcomings can be circumvented by clonal multiplication. This work aimed to multiply selected papaya cultivars from cuttings using the rooting promoting auxin indole-3-butyric acid (IBA). Materials and methods. Two experiments were conducted; the first one followed a completely randomized factorial design, with cultivars 'Golden' and 'Uenf/Caliman 01' as levels of the first factor, and 0, 500, 1,000, 1,500, and 2,000 ppm IBA as levels of the second factor. In this first trial, rooted cuttings of 'Uenf/Caliman 01' were taken to the field and compared to seedlings soon after planting and 4.5 months later. In the second experiment, IBA levels were increased aiming to enhance rooting percentage. Physiological assessments of rooted cuttings were also performed in this second experiment. Results and discussion. A concentration of 3,000 ppm IBA gave the best results for 'Golden', while lower concentration (1,500 ppm) seemed indicated for 'Uenf/Caliman 01'. Rooting success in 'Uenf/Caliman 01' was improved by using cuttings obtained from beheaded mother plants. The analyses showed that a few roots were sufficient to maintain good water status and photosynthetic rate in new plantlets. Conclusion. Plants propagated from cuttings had early flowering and produced first fruits at a lower height than seedlings in the field.

Adventitious rooting of wild passionflower Passiflora mucronata Lam. cuttings: vehiculation ways and concentrations of indole-3-butyric acidPassiflora mucronata Lam. is an ornamental, medicinal plant and resistant to bacterial blight on leaves. In addition, it is highly resistant to anthracnose in fruits and branches. The objective of this study was to evaluate the vehicultaion way, liquid or solid, and concentrations of indole-3-butyric acid (IBA) on adventitious rooting of P. mucronatacuttings. The experiment was carried out in a randomized block design in a 2x5factorial design (IBA vehiculation ways: liquid and solid x IBA concentrations: 0; 250; 500; 750 and 1000 mg L -1 for liquid or mg Kg -1 for solid), with four replicates with 16 cuttings each. The characteristics evaluated were rooting (%), root number, longest root length (cm), root volume (cm 3 ) and dry weight of root (g). It was found that the rooting of P. mucronata Lam. does not depend on the way IBA is conveyed, solid or liquid, but the quality of the root system, evaluated by means of the number, volume and dry mass of roots was superior to the one achieved whensolid IBA was used. The behavior of rooting, number and length of roots increased linearly up to the maximum concentration of IBA (1000 mg L -1 or mg Kg -1 ).