Adubação orgânica e mineral na semeadura de cultivares de feijoeiroOrganic and mineral fertilization on sowing of common bean cultivars

Amplamente cultivado na região tropical, o feijão comum é a leguminosa mais importante para a alimentação básica dos brasileiros. No Brasil, a produtividade do feijoeiro é baixa, por diversos fatores, entre os quais, a falta de informação sobre a nutrição da cultura principalmente em relação à adubação orgânica. Nesse sentido, o presente trabalho teve como objetivo avaliar o efeito da adubação química e orgânica de semeadura em diferentes cultivares de feijoeiro, na região norte de Mato Grosso. Para isso, foram testadas as cultivares pertencentes aos grupos comerciais Carioca, Mulatinho e Preto. As variáveis avaliadas foram: altura de plantas, altura de inserção da primeira vagem, número de vagem planta-1, comprimento das vagens, número semente planta-1, número de sementes vagem-1, massa de 100 sementes e produtividade. Todas as cultivares estudadas apresentaram elevado potencial produtivo, destacando-se como as mais produtivas sob adubação orgânica, BRS Cometa, BRS Estilo e BRS Campeiro; e na adubação química, as cultivares BRS Horizonte e BRS Campeiro.AbstractWidely cultivated in the tropical region, the common bean is the most important legume as basic food for Brazilians. In Brazil, bean productivity is low, due to several factors, including lack of information on crop nutrition, mainly in relation to organic fertilization. In this regard, the present work had the objective of evaluating the effect of chemical and organic fertilization of sowing in different bean cultivars, in the northern region of Mato Grosso. To this end, the cultivars belonging to the commercial groups Carioca, Mulatinho and Preto were tested. Te variables evaluated were: plant height, frst pod insertion height, plant-1 pod number, pod length, planta-1 seed number, pod-1 seed number, 100 seed mass and productivity. All the cultivars studied presented high productive potential, standing out as the most productive under organic fertilization, BRS Cometa, BRS Estilo and BRS Campeiro; and in the chemical fertilization the cultivars BRS Horizonte and BRS Campeiro

Optimal plot size in the evaluation of papaya scions: proposal and comparison of methods

ABSTRACT Evaluating 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

Optimal plot size in the evaluation of papaya scions: proposal and comparison of methods

ABSTRACT Evaluating 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