ABSTRACT Essential plant nutrients are mainly applied to soil and foliage for achieving maximum economic yields. Soil application method is more common most effective nutrients, which required in higher amounts. However, under certain circumstances, foliar fertilization effective. Foliar symptoms, tissue tests, crop growth responses principal nutrient disorder diagnostic techniques. applications of fertilizers done on the basis whereas visual symptoms or tests. Hence, correct diagnosis...

Ammonium sulfate and urea are main sources of nitrogen (N) for annual crop production in developing countries. Two greenhouse experiments were conducted using ammonium as N upland rice grown on a Brazilian Oxisol. The rates used 0, 50, 100, 150, 3000, 400 kg kg−1 soil. Yield yield components significantly increased quadratic fashion with increasing rate. X interaction was significant grain yield, shoot dry matter panicle number, plant height root weight, indicating different response...

Abstract Rhizobia and other plant growth‐promoting rhizobacteria (PGPR) have been broadly used as inoculants in agriculture, resulting morphofunctional improvements roots grain yield. This study was carried out during two cropping seasons under field greenhouse conditions Brazil to verify the effects of inoculation soybean cultivars with PGPR secondary microbial metabolites (SMMs) on root activity nodulation, development, Inoculation co‐inoculation treatments consisted Bradyrhizobium...

Amazonas State is the largest state in Brazil and mainly covered by tropical forest. Because of importance forest maintaining soil health a clean environment, conservation Amazon national priority. However, sustainable agriculture development necessary for welfare local population. Maintaining fertility at an adequate level important component farming. Very little information available about State. The objective present study was to evaluate chemical properties Brazil. Results include 3,340...

Soybean is one of the most important legume crops in world. Two greenhouse experiments were conducted to determine influence liming and gypsum application on yield components soybean changes soil chemical properties an Oxisol. Lime rates used 0, 0.71, 1.42, 2.14, 2.85, 4.28 g kg−1 soil. Gypsum applied 0.28, 0.57, 1.14, 1.71, 2.28 as well significantly increased grain a quadratic fashion. Maximum was achieved with 1.57 lime per kg soil, whereas requirement for maximum 1.43 improved pH,...

Abstract Background and aims Nano-zinc (Zn) fertilizer is an easily adaptable environmentally safe alternative option that can effectively improve growth, yield biofortification of common bean. Plant growth-promoting bacteria (PGPBs) could promote plant growth nutrients availability in sustainable manner. Therefore, this study aimed to investigate the influence foliar nano-Zn application association with seed co-inoculations PGPBs on yield, Zn use efficiencies bean cultivation. Two field...

The introduction of cultivars with earlier development and greater productivity has raised questions about the effect management practices on soybean [ Glycine max (L.) Merr] yield in a no‐till (NT) system. objective study was to evaluate interaction between N fertilization, row spacing, plant density photosynthetic index, components, yield, nutritional status soybean–wheat ( Triticum aestivum L.) intercropping. For cultivation, three rates, planting densities were assessed during two...

Short dry spells are an important grain yield constraint in tropical regions. Plant growth-promoting bacteria (PGPB) and their metabolites can mitigate the impact of drought stress by promoting changes plant metabolism, physiology, biochemistry. However, effects PGPB on soybean [Glycine max (L.) Merril] under regions have not been established. The experiments were carried out field conditions with short spells. Therefore, this study we used a three-factorial trial to evaluate bacterial...

Core Ideas In high‐yielding conditions, biological nitrogen fixation and soil total N may not be sufficient to sustain uptake rates during soybean seed‐filling period meet the seed demand required reach maximum attainable yield. Foliar fertilization in R3 R4 growth stages used increase supply final reproductive cycle of plant. The importance on nutrients application, special N, crop production has increased recent years tropical subtropical conditions Brazil because intensive cultivation...

This study evaluated the nutritional quality, yield, and storage protein modulation in soybean grains response to levels sources of sulfur (S) a dystrophic Ultisol. We used five S (0, 50, 100, 150 200 mg kg –1 ) four (elemental pastille - ESPA, gypsum GY, gypsite GI elemental powder ESPO). Plants treated with 50 GI, ESPO ESPA had largest grain yield values. Low supply resulted lower yields for all tested. Sulfur deficiencies were observed at resulting concentrations globulin higher...

O objetivo deste trabalho foi avaliar o efeito residual de rochas brasileiras aplicadas como fertilizantes e corretivos do solo. experimento conduzido em Neossolo Quartarênico cultivado com soja sucessão ao girassol sob condições casa vegetação, delineamento experimental inteiramente casualizado, quatro repetições. Os tratamentos consistiram cinco (brecha alcalina, arenito vulcânico, carbonatito, biotita xisto ultramáfica alcalina) doses correspondentes fornecimento 150 mg kg-1 K2 tendo...

ABSTRACT Banana cultivation is considered one of the most important agricultural activities economic and social importance in Brazil. The objective this work was to investigate uptake, retranslocation effect fertilization on yield uniformity banana bunches (Musa spp.) cultivated Central Amazonian, region with approximately 1.5 million km2 or 150 hectares. Two experiments were conducted a Xanthic Ferralsol (dystrophic Yellow Latosol), predominant soil region, examining: i) nutrient uptake...

Chickpea is a highly nutritious crop, but soil acidification poses major challenge to its yield in weathered tropical soils. This study evaluated the impact of liming on chickpea growth, yield, nutrient concentration, and use efficiency acidic Oxisols. The experiment was conducted greenhouse using completely randomized design with four lime application rates (0.0, 4.0, 8.0, 12.0 Mg ha−1) achieve different pH base saturation levels, replicates per treatment. Lime had significant quadratic...

Most tropical soils have high acidity and low natural fertility. The appropriate application of lime cattle manure corrects acidity, improves physical biological properties, increases soil fertility, reduces the use chemical and/or synthetic fertilizers by crops, such as soybean, main agricultural export product Brazil. This study aimed to assess effects combination dolomite limestone (0, 5, 10 Mg ha−1) 40, 80 on grain yield properties an Oxisol (Red Latosol) cultivated with soybean for two...

Fertilization of common bean (Phaseolus vulgaris) plants with amino-acids (AAs) near the beginning flowering may increase productivity. This procedure is aimed to avoid waste and nutrient use efficiency at end crop cycle, improving leaf area in translocation these nutrients bean. In order test this hypothesis, a field experiment was conducted on typic Eutrortox (Oxisol) randomized block design, three replicates. Four rates solution composed (6.8% glycine, 4.4% proline, 3.3% glutamic acid,...

Plant-growth-promoting bacteria can be used for sustainable forage grass production while increasing nutrition and biomass. Most of the soils under pasture in tropics have a degradation level that impairs yield potential, especially because mismanagement lack fertilization. The objective this work was to evaluate seed inoculation effects Azospirillum brasilense on shoot root dry mass nutritional status Urochloa brizantha cv. 'Marandu' field conditions two years low-fertility soil....

The objective of this study was to evaluate the effects strains Azospirillum brasilense, Pseudomonas fluorescens and Rhizobium tropici on shoot dry weight (SDW) root (RDW) yield, N uptake nutritive value 'Mavuno' grass inoculated with plant growth-promoting bacteria. We evaluated inoculation Ab-V5 Ab-V6 brasilense or co-inoculation Ab-V6, without nitrogen (N) application, as well re-inoculations. growth promoting bacteria + promoted increases in SDW RDW tillers weight, relative chlorophyll...

The selection of varieties or species plants with higher nutrient uptake efficiency and concentration for biofortification food crops is a key tool to reduce malnutrition. Soybean (Glycine max L. Merr) one the most important crops, because it consumed directly indirectly, in form seeds, processed (milk and/or derivatives), used as protein component animal feed worldwide. In order select nutrients 24 soybean tropical subtropical conditions different general features were assessed. There was...

Abstract Mathematical models that incorporate biotic and abiotic attributes are important tools for improving fertilizer use efficiency reducing production costs soybean [ Glycine max (L.) Merrill] crop. In this study, artificial neural networks (ANNs) were used to estimate grain yield (GY) under subtropical conditions in Brazil from plant morphological nutritional data collected 16 cultivars two growing seasons. The ANNs adequately trained, with a mean squared error of approximately 10 −5...

In tropical regions, use of cover crops in crop production is an important strategy maintaining sustainability cropping systems. Phosphorus (P) deficiency soils one the most yield-limiting factors for successful crops. A greenhouse experiment was conducted to evaluate influence P on growth and nutrient uptake 14 The soil used Oxisol, levels were low (0 mg kg−1), medium (100 kg−1) high (200 kg−1). There a significant treatments plant parameters. X interaction shoot dry weight, root weight...

Several efforts have been made in recent years to mitigate the different environmental impacts related agricultural activities. Rock dust technology is an important soil remineralization mechanism for sustainable tropical agriculture. The objective of this study was evaluate effect dunite rates on magnesium (Mg), silicium (Si), reducing sugars, sucrose and foliar starch, chemical attributes corn yield [Zea mays L.] two types. treatments consisted five (0, 42, 208, 542, 1542 mg kg−1) a clayey...

ABSTRACT Liming is an essential practice in improving yields of annual crops grown on acid soils and deficiency micronutrients including manganese (Mn) increasing crop plants recent years. A field experiment was conducted during three consecutive years to determine response common bean liming fertilization. The rates used were 0, 12, 24 Mg ha− 1 Mn 10, 20, 40, 80, 160 kg 1. significantly influenced grain yield bean. increase shoot dry weight pod number responsible for 44 34% variation yield,...