The effect of longitudinal distribution and seed depth on grain yield of common bean.

The aim of this study was to quantify the longitudinal distribution of plants in the row and seed depth and their effects on hypocotyl length and diameter and on yield components and grain yield of common bean, specifically the cultivar BRSMG Realce in a Latossolo soil in the Cerrado (Brazilian tropical savanna). The data on plant distances in the row were obtained in the field with the aid of a measuring tape in four rows of 2.5 m length. Seed depth was determined by measuring the length of the hypocotyl that was within the soil after pulling up the plant. Hypocotyl diameter was evaluated at ground level using a digital caliper. Descriptive (univariate) statistical analysis was applied to the data. Linear correlations were established among distribution of distance between plants in the row, the depth of sowing, the characteristics of the hypocotyls, and grain yield data of common bean. Negative linear regression was observed between grain yield with sowing depth, and positive linear regression between hypocotyl diameter and longitudinal spacing between plants in the row. In the sowing process, special attention should be given to seed distribution in the row to avoid subsequent uneven plant distribution and to seed depth to avoid yield loss

Does nitrogen fertilizer application rate to corn affect yield of subsequent soybean?

This study aimed to evaluate whether soybean benefits from N fertilizer rates applied to previous corn in a corn-soybean succession in Brazil´s Midwest region.Editors: Andreas Carstensen, Kristian Holst Laursen, Jan Kofod Schjorring

Depth of sulfur fertilization as affecting nodulation and grain yield of common bean.

Depth of sulfur (S) fertilization can affect common bean (Phaseolus vulgaris L.) development and a better understanding of its interaction with plant nodulation could help to improve common bean grain yield in soils under Cerrado. The objective of this study was to determine nodulation, grain yield and yield components of common bean as affected by rates and deep of S fertilization. The experimental designed was a randomized block in a factorial arrangement 4 x 2, with four replications. Treatments were the combination of sulfur rates (0, 20, 40, and 60 kg ha-1) at two depths (0.06 and 0.12 m) in two growing season (2014 and 2015). S fertilization depth did not affect number of nodules, root and shoot dry matter of common bean. The application of S in the uppermost layer provided significant increases in the number of pods per plant, number of seeds per pod and grain yield of common bean. Fertilization with S provided significant increases in grain yield of common bean. Thus, the sulfated fertilization should be considered in farming systems aiming for high yields

Manejo de nitrogênio associado ao uso de redutor de crescimento vegetativo no feijoeiro.

o objetivo desse trabalho foi avaliar o efeito do uso do Tilt® na redução do crescimento vegetativo do feijoeiro juntamente com diferentes doses de nitrogênio no rendimento da cultura.CONAFE

Aumento da eficiência de utilização de fósforo do solo em razão de aplicações foliares do nutriente.

O objetivo desse trabalho foi testar a hipótese ?a aplicação de P foliar aumenta a eficiência de utilização de P do solo pelo feijoeiro?, por meio da avaliação do efeito de doses do P foliar no acúmulo de P na planta e nos grãos de feijão e da produtividade de grãos. Pretendendo-se, com isso, concluir sobre a possibilidade de P foliar diminuir a aplicação de P no solo.CONAFE

Nitrogen management effects on soil mineral nitrogen, plant nutrition and yield of super early cycle common bean genotypes.

This study was conducted to measure the effects of the timing of nitrogen fertilization (NF) on soil N-NH4 + and N-NO3 -, macronutrient contents in the leaves and grains, and the grain yield of super early genotypes (SEG) of common bean. Field experiments were performed for four growing seasons in an Oxisol soil in Santo Antônio de Goiás, Brazil, using a randomized block experimental design in a split plot scheme. The plots were planted with common bean SEG, and the subplots were the NF timings, including a treatment without N fertilization. The available soil N with improved fertility and medium to high levels of organic matter were enough to meet the N demands of the common bean crop in order to achieve yields of up to 3,000 kg ha-1. Fertilization with N, regardless of the time of application, provided no increase in the yield components, grain yield and the N, P and K contents in the leaves and grains of the common bean SEG. The genotypes CNFC 15873 and CNFC 15875 had higher grain yields in the rainfed summer, and the genotype CNFC 15874 had higher grain yields in the irrigated winter growing season. It can be inferred that the use of common bean SEG, with life cycles ranging from 65 to 77 days, can be a promising technology, providing grain yields similar to the control (IPR Colibri)

Crescimento, acúmulo de nutrientes nas folhas e produtividade de grãos de genótipos superprecoces de feijão-comum.

Este estudo teve como objetivo caracterizar, por meio de análise de crescimento, acúmulo de N, P, K, Ca e Mg nas folhas, produtividade de grãos e componentes de produção de genótipos superprecoces de feijão-comum

Promotores de crescimento na produtividade do feijoeiro comum.

O objetivo desse trabalho foi avaliar a aplicação de promotores de crescimento ? Initiate Soy®, Grain-Set® e Bulk® ? por meio de tratamento de sementes e aplicação foliar sobre os componentes de produção e a produtividade de grãos do feijoeiro.CONAFE

Produtividade do feijoeiro em razão da adubação de cálcio e magnésio no sulco de semeadura.

O objetivo deste trabalho foi avaliar o efeito da adição destes produtos nos componentes de produção e na produtividade do feijoeiro irrigado em cultivo de inverno.CONAFE