scholarly journals Doses and Application Seasons of Potassium in the Soybean-Corn Succession in Soil With Improved Fertility in the Southwest of Goiás

2019 ◽  
Vol 11 (4) ◽  
pp. 307
Author(s):  
Warlles Domingos Xavier ◽  
Leandro Flávio Carneiro ◽  
Claudinei Martins Guimarães ◽  
João Vitor de Souza Silva ◽  
Flávio Araújo Pinto ◽  
...  
Keyword(s):  
Grain Yield ◽  
The State ◽  
Corn Production ◽  
Rational Use ◽  
Potassium Fertilization ◽  
Initial Content ◽  
Soil Constant

Soils with improved fertility indicate opportunities for more rational use of fertilizers. The objective of this study was to evaluate the management of potassium fertilization in the succession of soybean-corn in soil with improved fertility, in the southwestern region of the state, Goiás. The experiment was set in 5×3 factorial scheme, arranged in randomized blocks with four repetitions. The treatments consisted of the combination of potassium doses (0, 40, 80, 120 and 160 kg ha-1 of K2O) and seasons of application (100% of the dose in pre-planting, 100% of the dose in coverage and in installments with 50% of the dose in pre-planting + 50% in coverage). The best performance of soybean, considering grain yield, was obtained with the parceled application of 80 kg ha-1 of K2O, with production of 3.6 Mg ha-1. The highest corn production was obtained with the anticipated application of 160 kg ha-1 of K2O in soybean. In the management of potassium fertilization in improved fertility soil in the soybean-corn succession, the parceled application of 120 kg ha-1 of K2O kept the available K reserve in the soil constant when compared to its initial content.

scholarly journals Genetic gain in the breeding program of common beans at IAC from 1989 to 2007

2010 ◽  
Vol 10 (4) ◽  
pp. 329-336 ◽  
Author(s):  
Alisson Fernando Chiorato ◽  
Sérgio Augusto Morais Carbonell ◽  
Roland Vencovsky ◽  
Nelson da Silva Fonseca Júnior ◽  
José Baldin Pinheiro
Keyword(s):  
Grain Yield ◽  
Common Bean ◽  
Genetic Gain ◽  
Grain Quality ◽  
The State ◽  
Breeding Program ◽  
Common Beans ◽  
The Common ◽  
The Mean ◽  
Second Period

The goal of the present work was to evaluate the genetic gain obtained in grain yield for the common bean genotypes from 1989 until 2007, at the Instituto Agronômico de Campinas, in the state of São Paulo. Genetic gain has been separated into two research periods; the first, from 1989 to 1996, and the second, from 1997 to 2007. In the first period, a genetic gain of 1.07 % per year was obtained, whereas for the second period, the gain was zero. However, the mean yield of the evaluated lines was approximately 1000 kg ha-1 superior to the figures obtained in the first period. The main cause for the absence of genetic gain in the second period is that the focus of the breeding program was changed to grain quality. The individualized analysis of the genotypes with carioca grains in the second period indicated the lack of genetic gain during the investigated period.

Planting Date and Cultivar Effects on Grain Yield in Dryland Corn Production

2009 ◽  
Vol 101 (1) ◽  
pp. 91-98 ◽  
Author(s):  
Alpha Y. Kamara ◽  
Friday Ekeleme ◽  
David Chikoye ◽  
Lucky O. Omoigui
Keyword(s):  
Grain Yield ◽  
Planting Date ◽  
Corn Production

scholarly journals Response of wheat cultivars to foliar potassium fertilization under irrigated saline environment

2016 ◽  
Vol 8 (1) ◽  
pp. 429-436 ◽  
Author(s):  
M. Kumar ◽  
A. Sarangi ◽  
D. K. Singh ◽  
A.R. Rao ◽  
S. Sudhishri
Keyword(s):  
Grain Yield ◽  
Foliar Application ◽  
Wheat Cultivars ◽  
Salt Tolerant ◽  
Saline Irrigation ◽  
Irrigation Regimes ◽  
Potassium Fertilization ◽  
Yield Difference ◽  
Significant Yield ◽  
Heading Stage

A field experiment with split-split plot design (SSPD) was conducted to study the response of two winter wheat (Triticumaestivum L.) cultivars (viz. salt tolerant cultivar KRL-1-4 and salt non-tolerant cultivar HD-2894) under saline irrigation regimes with and without foliar potassium fertilization on growth and grain yield of wheat during rabi 2011-12 and 2012-13. Potassium in the ratio of K+: Na+ (1: 10) was applied as foliar application during the heading stage of the crop. Results showed that the grain yield of KRL-1-4 and HD-2894 cultivars with foliar potassium fertilization at the heading stage increased by 6.5 to 22% and 3 to 15% during rabi 2011-2012, respectively under different saline irrigation regimes as compared to the control. Moreover, the results of rabi 2012-13 showed an increase in grain yield ranging from 4.5 to 20% for KRL-1-4 as compared to the control. Statistical analysis of grain yield parameter showed that the foliar potassium application in both varieties resulted in significant yield difference at 0.05 probability level as compared to the non-foliar application. Overall, it was observed that the foliar potassium fertilization increased the grain yield of both wheat cultivars, while the salt tolerant cultivar performed better than the salt non-tolerant cultivar under irrigated saline regimes.

scholarly journals Efecto de la época y tipo de limpia en el frijol (Phaseolus vulgaris L.) de humedad residual.

2016 ◽  
Vol 8 (1) ◽  
pp. 59
Author(s):  
Valentín A. Esqueda ◽  
Arturo Durán ◽  
Ernesto López
Keyword(s):  
Phaseolus Vulgaris ◽  
Grain Yield ◽  
Central Area ◽  
The State ◽  
Phaseolus Vulgaris L ◽  
Residual Moisture ◽  
Grain Yields ◽  
Weed Density ◽  
Hand Weeding ◽  
Very High

Three experiments were carried out in the central area of the state of Veracruz, Mexico, during the Fall-Winter seasons of 1989-90, 1991-92 and 1992-93. The main objective was to determine the effect of the time and type of weeding on the yield of residual moisture growing beans. Twelve treatments, arranged in a CRBD with four replications were evaluated. Treatments consisted in hoeing at different times. In some treatments, hoeing was complemented with hand-weeding. The highest grain yields were obtained when the weeds were eliminated at least in two ocations during the early stages of development of the crop. The yield of these treatments was significantly higher than that obtained with the traditional weeding practice (hoeing at 25 days after emergence).Handweeding after hoeing increased grain yields at high weed densities,but when the weed density was not very high, handweeding after hoeing made no difference. The increase in grain yield obtained when two weeding operations were performed instead of one, was sufficient to cover for the expenses of this additional practice and to generate economic profits.

scholarly journals Adaptability and stability of erect cowpea genotypes via REML/BLUP and GGE Biplot

Bragantia ◽  
2016 ◽  
Vol 75 (3) ◽  
pp. 299-306 ◽  
Author(s):  
Adriano dos Santos ◽  
Gessi Ceccon ◽  
Paulo Eduardo Teodoro ◽  
Agenor Martinho Correa ◽  
Rita de Cássia Félix Alvarez ◽  
...  
Keyword(s):  
Grain Yield ◽  
The State ◽  
Gge Biplot ◽  
Phenotypic Stability ◽  
Ge Interaction ◽  
Mato Grosso ◽  
Mato Grosso Do Sul ◽  
The Ideal

ABSTRACT The objective of this study was to investigate the association between the GGE Biplot and REML/BLUP methods and select cowpea genotypes that meet simultaneously high grain yield, adaptability and stability in the Mato Grosso do Sul environments. The experiments were carried out from February to July 2010, 2011 and 2012 in the municipalities of Dourados, Aquidauana and Chapadão do Sul. The experiments in Chapadão do Sul were conducted only in the years of 2010 and 2011, totaling eight environments. After detecting significant genotypes × environments (GE) interaction, the adaptability and the phenotypic stability of cowpea genotypes were analyzed by GGE Biplot and REML/BLUP methods. These methods were concordant in the identification of the best cowpea genotypes for the State of Mato Grosso do Sul. The BRS- Tumucumaque and BRS-Guariba cultivars are the closest to the ideal in terms of high grain yield and phenotypic stability, being suitable for cultivation in the State.

scholarly journals Implications of predictable and unpredictable environmental factors in common bean VCU trials in Minas Gerais

2014 ◽  
Vol 14 (3) ◽  
pp. 146-153 ◽  
Author(s):  
Lidiane Kely de Lima ◽  
Magno Antonio Patto Ramalho ◽  
Ângela de Fátima Barbosa Abreu ◽  
Fernando Henrique Ribeiro Barrozo Toledo ◽  
Ricardo Augusto Diniz Cabral Ferreira
Keyword(s):  
Environmental Factors ◽  
Grain Yield ◽  
Common Bean ◽  
Total Variation ◽  
Minas Gerais ◽  
The State ◽  
Good Strategy ◽  
Yield Data ◽  
Relative Contribution ◽  
Environmental Variations

The aim of this study was to estimate the relative contribution of predictable and unpredictable environmental variations to the lines x environments interaction and verify if it is possible to reduce the number of evaluation environments of the Value for Cultivation and Use Trials (VCU) conducted in Minas Gerais, Brazil. We used grain yield data from 166 VCU trials of common bean conducted in the state from 2002 to 2012. Individual and joint analyses of variance of the environments were carried out for each two-year period and the contribution of each source of variation to total variation was estimated. Subsequently, ecovalence was used, and joint analyses of variance were made considering different numbers of environments by means of resampling. The source of variation that most contributes to the interaction is location. Reduction in the number of environments in the VCU trials is not a good strategy for recommendation of cultivars in Minas Gerais.

Monitoring the Condition of Mineral Nutrition of Crops Using UAV for Rational Use of Fertilizers

2019 ◽  
pp. 293-319 ◽  
Author(s):  
Dmytro Sergiyovich Komarchuk ◽  
Vitalii Pylypovych Lysenko ◽  
Oleksii Oleksandrovych Opryshko ◽  
Nataliia Anatoliivna Pasichnyk
Keyword(s):  
Mineral Nutrition ◽  
Metrological Support ◽  
Digital Camera ◽  
The State ◽  
Infrared Range ◽  
Agricultural Crops ◽  
Optical Range ◽  
State Monitoring ◽  
Rational Use ◽  
Official Data

The reviewed problem deals with the metrological support of sensory equipment using cameras with standard and infrared lenses. The elaborated method to use UAVs for remote shooting of agricultural crops and obtaining images is to be used to determine the level of nitrogen provision for grain crops has been developed. For radiofrequency correction of lighting changes while mineral nutrition state monitoring, it is recommended to use a method with the application of official data to be calculated on the basis of camera's regular camera exposure meter measurements. It is advisable to use an infrared lens for monitoring the state of individual crops using digital non-specialized cameras instead of optical one. Exampling GoPro Hero 4 digital camera, it has been found that there are three channels to use IR lens which have the characteristics of fixing radiation either in the infrared range or in the red area of the optical range.

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