scholarly journals Changes in chemical soil and corn yield after application of gypsum and potassium doses

2020 ◽  
Vol 36 (3) ◽  
Author(s):  
Hamilton César de Oliveira Charlo ◽  
Juliano da Silva Martins de Almeida ◽  
Regina Maria Quintão Lana ◽  
Renata Castoldi ◽  
Édimo Fernando Alves Moreira ◽  
...  
Keyword(s):  
Soil Acidity ◽  
Block Design ◽  
Corn Yield ◽  
Reaction Products ◽  
Soil Liming ◽  
Minas Gerais State ◽  
Randomized Complete Block Design ◽  
Chemical Soil ◽  
Chemical Attributes ◽  
Potential Acidity

Soil liming is a common practice in agriculture. It aims to reduce soil acidity and to supply calcium and magnesium. Lime, however, is not easily soluble in the soil, and its reaction products are often concentrated in the application zone, which is mainly the topsoil layer. In order to increase the concentration of nutrients in deeper layers, agricultural gypsum—a byproduct of phosphoric acid production process, rich in calcium and sulfur—is used. In this context, the objective of this study was to evaluate the chemical attributes of the oxysoil and the corn´s yield to the application of gypsum associated with potassium (K) rates. The study was developed in Uberaba city, Minas Gerais state, Brazil. The factorial scheme was used 5x5, with five rates of K (0, 100, 180, 240, 360 kg ha-1 K2O) and five gypsum rates (0, 500, 1000, 2000, 4000 kg ha-1) in a randomized complete block design with four replications. The soil chemical attributes were evaluated at 0.0-0.20 m and 0.20-0.40 m depth and the biometric and productive attributes of corn. The application of gypsum resulted in the increase of calcium (Ca) and sulfur (S) contents in all depths; reduced the levels of pH, manganese, potential acidity (H + Al) in the 0.0-0.20 m depth, and increase the levels of base of saturation and sum of bases on the 0.20-0.40 m depth. Corn yield and biometric attributes no were influenced by the factors evaluated.

scholarly journals Green ear yield and grain yield of maize cultivars in competition with weeds

2010 ◽  
Vol 28 (1) ◽  
pp. 77-85 ◽  
Author(s):  
P.S.L. Silva ◽  
K.M.B. Silva ◽  
P.I.B. Silva ◽  
V.R. Oliveira ◽  
J.L.B. Ferreira
Keyword(s):  
Grain Yield ◽  
Plant Height ◽  
Block Design ◽  
Corn Yield ◽  
Modern Agriculture ◽  
Maize Cultivars ◽  
Randomized Complete Block Design ◽  
Ear Height ◽  
Herbicide Use ◽  
Ground Part

The reduction in herbicide use is one of the greatest interests for modern agriculture and several alternatives are being investigated with this objective, including the adoption of cultivars that suppress weeds. The objective of this study was to verify if maize cultivars develop differently, in competition with weeds, to produce green ears and grain. Randomized complete block design was used, with split-plots and five replications. Cultivars DKB 390, DKB 466, DKB 350, AG 7000, AG 7575 and Master, were evaluated in the plots, without weeding and two weedings (at 22 and 41 days after sowing) in sub plots. Twenty-one species were identified in the experimental area, the most frequent being Gramineae (Poaceae), Euphorbiaceae, Leguminosae (Fabaceae) and Convolvulaceae species. There was no difference in the dry biomass above-ground part of the weeds in the plots of the evaluated cultivars. The cultivars behaved similarly in treatments with or without hoeing, except for plant height and ear height evaluations. Without hoeing, plant height increased in cultivar DKB 390, while plant height and ear height decreased in cultivar AG 7575. In the other cultivars, these traits did not change under weed control. The presence of weeds decreased the values of all traits employed to assess green corn yield, with the exception of the total number of green ears and grain yield.

scholarly journals Application of Vermicompost to Soil P Levels, Tissue P Levels, and Corn Yields in Entisols

2021 ◽  
Vol 4 (1) ◽  
pp. 29-33
Author(s):  
Efian Aprizal ◽  
Hasanudin Hasanudin ◽  
RR Yudhy Harini Bertham ◽  
Herry Gusmara ◽  
Edhi Turmudi
Keyword(s):  
Block Design ◽  
Growth And Yield ◽  
Corn Yield ◽  
Soil P ◽  
Randomized Complete Block Design

This study aims to determine the optimum dossage of vermicompost to soil P levels, tissue P levels as well as corn growth and yield in Entisols. This research was conducted at Kandang Mas village, Bengkulu City from August 2019 until November 2019. The design used in this study is Randomized Complete Block Design (RCBD) one factor is the application of vermicompost dose with three replications. The dossage of vermicompost consists of seven levels, namely 0 tons ha-1, 5 tons ha-1, 10 tons ha-1, 15 tons ha-1, 20 tons ha-1, 25  tons ha-1, and 30 tons ha-1. The results showed that there was no optimum dossage of vermicompost to soil P levels, tissue P levels, and corn yield in Entisols. 

scholarly journals Pengaruh Macam Pupuk Organik Terhadap Pertumbuhan dan Hasil Jagung Manis (Zea mays-saccharata, Start)

2021 ◽  
Vol 1 (1) ◽  
pp. 5-10
Author(s):  
Sukuriyati Susilo Dewi ◽  
Bambang Heri Isnawan ◽  
Dwi Purwana
Keyword(s):  
Organic Matter ◽  
Sweet Corn ◽  
Block Design ◽  
Field Research ◽  
Organic Manure ◽  
Growth And Yield ◽  
Corn Yield ◽  
Manure Treatment ◽  
Randomized Complete Block Design ◽  
Chicken Farm

A field research to observe the effect of kinds of organic manure and on growth  and yield of sweet  corn  was  done  in Danguran   village,  Klaten  Regency  of Midle Java. The research was conducted during August to October 2003. The field experiment was arranged in a Randomized Complete Block Design, with 3 replications. The kinds of organic manure treatment consisted of 5 levels which are: no farm manure (PKO), chicken farm manure (PKl), vermicompost or Kascing (PK2), cow farm manure A (PK3), and cow farm  manure-B (PK4). Each organic matter given was 10 ton /ha. The result showed that the chicken farm manure gave the significantly higher growth and yield  of sweet  corn  than  the others.  The average sweet corn yield obtained in this research was 16,2 ton/ha.

scholarly journals Consortium of eucalyptus with forage sorghum in semiarid of Minas Gerais State

2017 ◽  
Vol 47 (11) ◽  
Author(s):  
Carlos Juliano Brant Albuquerque ◽  
Sérgio Macedo Silva ◽  
José Magno Queiroz Luz ◽  
César Henrique Zandonadi
Keyword(s):  
Essential Oil ◽  
Block Design ◽  
Eucalyptus Camaldulensis ◽  
Oil Yield ◽  
Design Experiment ◽  
Eucalyptus Urophylla ◽  
Fresh Biomass ◽  
Minas Gerais State ◽  
Randomized Complete Block Design ◽  
Essential Oil Yield

ABSTRACT: The objective was to estimate the wood yield and essential oil content in three clones of eucalyptus that were planted in four contrasting arrangements and intercropped with sorghum. Eucalyptus clones MA2001 (Eucalyptus camaldulensis x E. tereticornis), A144 (Eucalyptus urophylla x E. grandis), and GG100 (Eucalyptus urophylla x E. grandis), were planted in single rows (10x2m), double rows (2x3+15m and 2x3+20m); and, triple rows (2x3x2+10m) in a randomized, complete block design experiment with four replicates. Our results demonstrated that planting spacing did not influence the essential oil yield or diameter at breast height in the clones. However, higher density plantings were shown to result in higher fresh weight of branches and leaves per plant. MA2001 grew taller, produced higher quantity of fresh biomass of branches and leaves per plant and volume of wood per hectare, and yielded more essential oil yield than the other clones. We concluded that MA2001 is the most suitable of the clones tested here for cultivation in water deficit conditions.

NANOPARTICULADO NO FORNECIMENTO DE Ca E Mg NA CULTURA DO CAFÉ VIA FERTIRRIGAÇÃO

2017 ◽  
Vol 32 (3) ◽  
pp. 265
Author(s):  
Waylson Zancanella Quartezani ◽  
Estevão Morgan Uliana ◽  
Jean Barros de Souza ◽  
Ramon Amaro de Sales ◽  
Talita Aparecida Pletsch
Keyword(s):  
Soil Acidity ◽  
Block Design ◽  
Agricultural Crops ◽  
Randomized Block Design ◽  
Soil Liming ◽  
Sources Of Variation ◽  
Increase Productivity ◽  
Application Frequency ◽  
Split Frequency ◽  
Experimental Plots

Das tecnologias usadas para aumentar a produtividade e a rentabilidade das culturas agrícolas, a calagem e adubação do solo se destacam entre as principais. Assim a necessidade de encontrar corretivos e fertilizantes com mais eficiência e menos onerosos caracteriza a realidade da agricultura brasileira. Além do calcário, outros materiais corretivos vêm surgindo como opção de uso. Esse trabalho teve como objetivo avaliar a eficiência da tecnologia de nanoparticulado na correção da acidez do solo e fornecimento do Ca e Mg, sendo este produto avaliado em análise de duas fontes de variação: D - diferentes doses do produto recomendado e P - parcelamento da dosagem ou intervalo de aplicação. Cada fonte de variação apresentando quatro 4 tratamentos, sendo eles: D1 – dose 5 l.ha-1; D2 – dose 10 l.ha-1; D3 – dose 15 l.ha-1 e D4 - dose 18 l.ha-1 para D. E P1 - uma parcela; P2 - duas parcelas (aplicação a cada 6 meses); P3 - três parcelas (aplicação a cada 4 meses) e P4 - quatro parcelas (aplicação a cada 3 meses) para P. O Delineamento estatístico do experimento foi em Blocos Casualizados (DBC), com arranjo fatorial em faixas (“strip-plot”) dos 16 tratamentos, 3 repetições por tratamento, totalizando 48 parcelas experimentais. Os resultados obtidos com tecnologia do nanoparticulado testado, nas dosagens de 10 a 15 l.ha-1, em 2 a 3 aplicações ao ano, tem efeitos positivos e suficientes para suprir as demandas de Ca2+ e Mg2+ no solo e na planta para cultura do café conilon, no período de um ano agrícola e nas condições de cultivo.PALAVRA-CHAVES: Calagem, Adubação, Nanopartículas. NANOPARTICULATE IN THE SUPPLY OF Ca AND Mg IN COFFEE CULTURE VIA FERTIRRIGATIONABSTRACT: Of all  technologies used to increase  productivity and  profitability of  agricultural crops, soil  liming and fertilization stand out among the main ones. Thus, the need to find correctives and fertilizers less costly and more efficient characterizes the reality of Brazilian agriculture. The objective of this work was to evaluate the efficiency of the nanoparticulate technology in the correction of soil acidity and the supply of Ca and Mg. , The technology was assessed by analyzing two sources of variation: D - different rates of the product recommended; and P - splitting the rate or application frequency. Each source of variation was subjected to 4 (four) treatments: D1 - 5 l ha-1; D2 - 10 l ha-1; D3 15 l ha-1, and D4 18 l ha-1 for  rates D; and P1 – one split; P2 - two splits (application every 6 months); P3 - three splits (application every 4 months); and P4 - four splits (application every 3 months) for split frequency P. The experiment was arranged in a factorial strip-plot randomized block design (RBD), with 16 treatments and 3 replicates per treatment, totaling 48 experimental plots.  Dosages of 10 to 15 l ha-1 , in 2 to 3 applications per year, had  positive and sufficient effects to supply the demands of Ca2+ and Mg2+ for Conilon coffee crop , during an agricultural year and in the study cultivation conditions.KEYWORDS: Liming, Fertilization, Nanoparticles.

scholarly journals Alternative sources of potassium in coffee plants for better soil fertility, productivity, and beverage quality

2018 ◽  
Vol 53 (12) ◽  
pp. 1355-1362 ◽  
Author(s):  
Kaio Gonçalves de Lima Dias ◽  
Paulo Tácito Gontijo Guimarães ◽  
Davi Lopes do Carmo ◽  
Thiago Henrique Pereira Reis ◽  
Julian Junio de Jesus Lacerda
Keyword(s):  
Soil Fertility ◽  
Soil Acidity ◽  
Block Design ◽  
Exchange Capacity ◽  
Silicate Mineral ◽  
Soil Fertilization ◽  
Split Dose ◽  
Randomized Complete Block Design ◽  
Coffee Plants ◽  
Alternative Sources

Abstract: The objective of this work was to evaluate alternative sources of potassium for improving soil fertility and coffee productivity and beverage quality. The experiment was conducted in a coffee (Coffea arabica) crop, planted in an Oxisol area, in the municipality of Patrocínio, in the state of Minas Gerais, Brazil. The treatments consisted of the K sources TK47 and Super Greensand (SG) - both based on glauconite silicate mineral -, at the following doses: 0 kg ha-1 K2O (control); 42, 84, 168, and 336 kg ha-1 K2O from TK47; 618 kg ha-1 K2O from KCl; and 168 kg ha-1 K2O from SG. A randomized complete block design was used, with four replicates in each treatment. The experimental units consisted of three rows with ten plants each, using the eight central plants as the useful plot. Potassium fertilization with TK47 increased soil fertility, correcting soil acidity and elevating K+, P, and Ca2+ contents, effective cation exchange capacity, and Zn2+ and Fe2+ levels in the soil. Fertilization with 336 kg ha-1 K2O from TK47, in a single dose, provides grain yield and polyphenol oxidase activity similar to those of fertilization with 618 kg ha-1 K2O from KCl, in a split-dose, but a better sensory analysis of the resultant beverage.

scholarly journals Nitrogen fertilization in off-season corn crop in different Brazilian Cerrado environments

2020 ◽  
Vol 55 ◽  
Author(s):  
Eduardo de Paula Simão ◽  
Álvaro Vilela de Resende ◽  
Miguel Marques Gontijo Neto ◽  
Alexandre Ferreira da Silva ◽  
Vicente de Paulo Campos Godinho ◽  
...  
Keyword(s):  
Grain Yield ◽  
Nitrogen Fertilization ◽  
Block Design ◽  
Corn Yield ◽  
Brazilian Cerrado ◽  
Economic Return ◽  
Total N ◽  
Starter Fertilizer ◽  
Corn Crop ◽  
Randomized Complete Block Design

Abstract: The objective of this work was to assess the grain yield and the economic response of off-season corn (Zea mays) crop subjected to different combinations of starter and topdressing nitrogen fertilization, in the Brazilian Cerrado region. The experiment was carried out in a randomized complete block design in a 3×4 factorial arrangement (0, 45, and 90 kg ha-1 N at sowing and 0, 22.5, 45, and 90 kg ha-1 N in topdressing as urea), in six environments, combining three sites and two sowing times. Grain yield was determined, and the response to total N applied as starter and topdressing was used to obtain a general model of the average trend of the technical and economic return of fertilization. The corn crop response varied according to the environment, and the observed yields were high. The application of N as a starter fertilizer increased corn yield and improved the effect of topdressing fertilization or even made it unnecessary. Fertilization with 90 kg ha-1 N as urea promotes greater yield and economic return and improves N balance in the soybean/off-season corn crop system.

scholarly journals SOIL ATTRIBUTES AND EDAPHIC NEMATOFAUNA IN PASTURES WITH PIG SLURRY SUCCESSIVE APLICATIONS

2019 ◽  
Vol 32 (4) ◽  
pp. 867-876
Author(s):  
DIEGO ARMANDO AMARO DA SILVA ◽  
DANNI MAISA DA SILVA ◽  
JANAÍNA TAUIL BERNARDO ◽  
CRISTIANO BELLÉ ◽  
PAULO ROBERTO KUHN ◽  
...  
Keyword(s):  
Soil Quality ◽  
Block Design ◽  
Native Forest ◽  
Soil Nematode ◽  
Pig Slurry ◽  
Free Living ◽  
P Content ◽  
Randomized Complete Block Design ◽  
Physical Attributes ◽  
Chemical Attributes

ABSTRACT Considering that nematodes are quite sensitive to anthropic interventions, these organisms can be used as indicators of soil quality (SQ). The objective of this work was to study chemical and physical attributes and soil nematode as an indicator of soil quality in pasture areas with successive application of pig slurry (PS) in the Northwest of the state of Rio Grande do Sul. For this, the different areas were considered: Azevém + Tifton pasture with PS use for 14 years (A14), Azevém + Tifton pasture with use of PS for two years (A2) and native forest (NF), with a chemical and physical attributes nematofauna of the soil, with three replicates per treatment, in a randomized complete block design. The soil chemical attributes were sensitive to changes in pasture areas with successive application of PS, with increase in P content, compared to the NF area and soil OM content in the A14 area similar to that found in the NF area. In relation to the soil physical attributes, density and microporosity increased with the successive application of PS in ryegrass + tifton pasture areas, while macroporosity decreased, compared to NF areas. The nematodes of the Discocriconemella, Paratylenchus, Pratylenchus, Trichodorus, Tylenchus and free-living groups were efficient as indicators of soil quality, since they were able to evidence alterations in soil chemical and physical attributes between the ryegrass + tifton use of PS and in relation to the native forest.

scholarly journals Productivity and Profitability of Two Varieties of Ampalaya (Momordica charantia L.) under Different Nutrient Solutions and their Combination in an Aggregate Hydroponics System

2018 ◽  
Vol 12 (1) ◽  
pp. 66-78
Author(s):  
Reyna Mae Caintic ◽  
◽  
Rosario Salas
Keyword(s):  
Yield Components ◽  
Soil Acidity ◽  
Block Design ◽  
Growth Yield ◽  
Conventional Farming ◽  
Factor B ◽  
Hydroponic System ◽  
Randomized Complete Block Design ◽  
Hydroponic Systems ◽  
Nutrient Solutions

Hydroponics is a system of growing plants in nutrient solutions which could be from organic or inorganic sources with or without the use of aggregate medium. It is an alternative way of growing vegetables that would overcome problems encountered in conventional farming like soil acidity, alkalinity, and soil-borne diseases. This study was conducted to evaluate the growth, yield, and profitability of ampalaya varieties grown under aggregate hydroponic systems using different nutrient solutions. The experiment was laid out in a Factorial Randomized Complete Block Design with three replications using ampalaya hybrids as factor A and nutrient solutions as factor B. The two ampalaya hybrids (Galaxy and Jade Star) applied with commercial solution showed significantly greater values in terms of horticultural parameters, yield, and yield components. Between the two ampalaya hybrids, no significant effect was observed in most of the characteristics except on the weight of roots. Galaxy had heavier roots compared to Jade Star. Consistent superiority of plants applied with commercial solution was manifested in most parameters. The overall results revealed that production of ampalaya hybrid using an aggregate hydroponic system is profitable.

scholarly journals Classifying Soybean Cultivars Using an Univariate and Multivariate Approach

2020 ◽  
Vol 12 (11) ◽  
pp. 190
Author(s):  
João Paulo Santos Carvalho ◽  
Adriano Teodoro Bruzi ◽  
Karina Barroso Silva ◽  
Igor Oliveri Soares ◽  
Mariane Cristina Bianchi ◽  
...  
Keyword(s):  
Block Design ◽  
Univariate Analysis ◽  
Selection Strategy ◽  
Productive Performance ◽  
Genotype By Environment ◽  
Soybean Cultivars ◽  
Selection Indices ◽  
Coincidence Index ◽  
Minas Gerais State ◽  
Randomized Complete Block Design

Selection indices are good for classification because they consider several evaluated traits simultaneously to identify superior cultivars with a combination of the traits of interest. Adaptability/stability methods enable determining contributions to the genotype-by-environment (G × E) interaction and the risk associated with each cultivar. This study used a univariate and multivariate strategy to identify commercial soybean cultivars that presented both precocity and good productive performance and studied the G × E interaction considering all cultivars both simultaneously and by maturation groups. The experiments were conducted in the agricultural years 2014/15 and 2015/16 in seven distinct environments in southern Minas Gerais State, Brazil, considering a combination of locations and seasons. A randomized complete block design was used, and the treatments included 35 commercial soybean cultivars. In the univariate analysis, were evaluate several traits. Selection indices were calculated considering yield, harvest index, plant height, first pod insertion height and absolute maturation. The selection strategy efficiencies were quantified using the coincidence index. Each cultivar’s contribution to the G × E interaction and associated risk were determined using the ecovalence and confidence index methods, respectively. The results showed that the NS 7000 IPRO and NS 7209 IPRO cultivars were the most productive. The NS 7000 IPRO cultivar, although obtaining a good yield, contributed greatly to the G × E interaction when considering the maturation groups. The low coincidence in ranking the strategies indicates that more than one agronomic trait should be used to classify the superior cultivars.

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