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Publications (34)
The need for sugarcane field reform has driven the expansion of soybean cultivation in rotation with sugarcane. Weeds are one of the main reasons for this reform, requiring specific management in rotation. The use of pre-emergence herbicides in soybean is a viable option, but its effectiveness in sandy soils requires further study. In this experime...
In soil, potassium (K) is present as structural K, non-exchangeable K (Kne) and exchangeable K (Ke). Exchangeable K is considered available to plants, but exudates from plant roots and microbes can dissolve Kne and make it available. Some grasses used as cover crops are particularly efficient in releasing Kne. In this work, we assessed the effects...
Grass intercropping under no-till is an option to increase crop residues on the soil surface and crop diversity. Urochloa spp. is frequently selected for intercropping to improve land use and agricultural production because of its high residue production, slow residue decomposition, as well as its vigorous, abundant, and deep root system. However,...
In humid tropical regions, intense weathering extensively depletes soil nutrients. However, soils in the Araguaia River Valley, Brazil, are not responsive to potassium (K) fertilization. To explore the reasons for this lack of responsiveness, an extensive exploratory soil sampling campaign was performed in areas of the valley with different land us...
The introduction of ruzigrass (Urochloa ruziziensis) in rotation or intercropped with a cash crop may improve K cycling in the cropping system due to the ability of its extensive root system to take up nutrients, including non-exchangeable K (Kne), at greater depths in the soil profile. The present study was carried out with the aim of evaluating K...
Soybean production in sandy soils under the recovery process presents risks that can be mitigated by growing crops between crop seasons, focused on silage production, which can assist in environmental improvement, accelerating soil recovery, in addition to improvement in soybean grain yield. The objective of this study was to evaluate soybean grain...
Among the plant nutrients, potassium (K) plays a fundamental role in plant physiology and the soil-plant dynamics of various nutrients. Careful rate recommendations for K are needed to ensure that the balance between cationic nutrients and micronutrients is maintained, especially in sandy soils. The current research aimed to evaluate the absorption...
Rice is commonly used in degraded pasture area renovation. In this process, the rice is set up simultaneously with the forage plants, which increases the difficulty to control post-emerged weeds. Thus, this study aimed to evaluate rice crop development intercropped with Urochloa under the herbicides pendimethalin and trifluralin application. The ex...
Surface liming to correct soil acidity may have limited effectiveness in subsurface layers in no‐till systems (NTS). The possibility of downward movement may be increased when liming is combined with fertilization with urea (ammoniacal N), as NO3– formed by nitrification of NH4⁺ can form ion pairs with exchangeable Ca²⁺ and Mg²⁺. Liming can also in...
Some plant species are able to acquire non-exchangeable forms of K, which improve K availability and cycling in cropping systems, and which may explain the lack of response to K. However, this would not be expected in soils dominated by kaolinite. The aim of this study was to assess non-exchangeable K (Kne) use by three selected plant species grown...
Liming and N fertilization are common practices for optimizing crop yields in tropical agriculture, but the adequate N rate to ensure crop development, enhance yields and N use efficiency, and improve soil chemical properties has not been established for grass rotation. We assessed the optimal N fertilizer rate for combination with liming in an agr...
No-till (NT) farming is a major soil conservation strategy. In the Brazilian Cerrado, soybean is the main grain crop, and strategies that improve the cultivation of cover crops in the off-season in succession to soybean could facilitate NT for large cultivated areas. In the municipality of Nova Xavantina, MT, Brazil, three experiments were carried...
No-till (NT) farming is a major soil conservation strategy. In the Brazilian Cerrado, soybean is the main grain crop, and strategies that improve the cultivation of cover crops in the off-season in succession to soybean could facilitate NT for large cultivated areas. In the
unicipality of Nova Xavantina, MT, Brazil, three experiments were carried...
Slow-release fertilizers have been proposed as tools to increase P fertilizer use efficiency in tropical acidic soils with high P adsorption, low P availability, and mobility. However, results have been controversial since soil diversity and the fertilizer itself may influence the results, which is not completely understood. Soil P diffusion and av...
Ruzigrass (Urochola ruziziensis) has a large capacity to take up K from the soil, including non-exchangeable forms, and can play an important role in nutrient cycling in integrated production systems. However, K transport to roots of brachiarias is not well known, nor the nutrient dynamics in the rhizosphere, where a concentration gradient may be e...
This report summarizes the results of the Brazilian network of trials for chemical control of target spot (Corynespora cassiicola) in soybean, in the 2017-2018 crop season.
This report summarizes the results of the Brazilian network of trials for evaluation of single-site fungicides efficiency to control Asian soybean rust (Phakopsora pachyrhizi), in the 2017-2018 crop season.
This technical report brings the summarized results from the network trials for fungicide efficiency evaluation to control target spot (Corynespora cassiicola) on soybean in Brazil, crop season 2016-2017 (in portuguese).
Also available at: https://ainfo.cnptia.embrapa.br/digital/bitstream/item/162647/1/CT-130-OL.pdf
This technical report brings the summarized results from the network trials for protectant fungicide efficiency evaluation to control Asian soybean rust (Phakopsora pachyrhizi) on soybean in Brazil, crop season 2016-2017 (in portuguese).
Also available at: https://ainfo.cnptia.embrapa.br/digital/bitstream/item/162646/1/CT-131-OL.pdf
This technical report brings the summarized results from the network trials for fungicide efficiency evaluation to control Asian soybean rust (Phakopsora pachyrhizi) on soybean in Brazil, crop season 2016-2017 (in portuguese).
Also available at: https://ainfo.cnptia.embrapa.br/digital/bitstream/item/162648/1/CT-129-ferrugem-OL.pdf
p>A espécie Murdannia nudiflora pertence à família Commelinaceae é conhecida como “trapoerabinha”. Devido à elevada capacidade competitiva e por apresentar tolerância ao glyphosate esta espécie se desenvolve e compete com a soja, apresenta rápido crescimento quando ocorre a senescência das folhas de soja e dificulta o manejo das plantas daninhas no...
Eficiência de fungicidas para o controle da ferrugem-asiática da soja, Phakopsora pachyrhizi, na safra 2015/16: resultados sumarizados dos ensaios cooperativos. Foto: Antonio Alberto dos Santos A ferrugem-asiática da soja, causada pelo fungo Phakopsora pachyrhizi, é uma das doenças mais severas que incide na cultura da soja, com danos variando de 1...
Eficiência de fungicidas multissítios no controle da ferrugem-asiática da soja, Phakopsora pachyrhizi, na safra 2015/16: resultados sumarizados dos ensaios cooperativos Londrina, PR Agosto, 2016
Com a introdução na agricultura nacional de híbridos de milho resistentes ao herbicida glyphosate, o manejo de plantas daninhas, principalmente, de gramíneas, foi favorecido. No entanto, plantas voluntárias de milho oriundas dos grãos perdidos na colheita mecanizada podem causar perdas significativas na cultura semeada subsequente, que frequentemen...
Eficiência de fungicidas para o controle da mancha-alvo, Corynespora cassiicola, na safra 2013/14: resultados sumarizados dos ensaios cooperativos
The fungus Corynespora cassiicola, the causal agent of soybean target spot, frequently occurs in the Brazilian midwestern region. Under favorable climate conditions it can cause serious damage to this crop. The use of resistant cultivars is recommended although there are only a few available in the market. This investigation was carried out to eval...
Reaction of soybean cultivars to Corynespora cassiicola The fungus Corynespora cassiicola, the causal agent of soybean target spot, frequently occurs in the Brazilian midwestern region. Under favorable climate conditions it can cause serious damage to this crop. The use of resistant cultivars is recommended although there are only a few available i...
O objetivo deste trabalho foi avaliar a seletividade de diferentes herbicidas à cultura do milho e a Brachiaria ruziziensis cultivadas no sistema de integração lavoura-pecuária. O experimento foi conduzido no Município de Nova Xavantina – MT, no período de janeiro a junho de 2008, em solo classificado como Latossolo Vermelho distrófico. O delineame...
O objetivo deste trabalho foi avaliar a interferência de diferentes doses de nitrogênio e duas fontes desse nutriente na cultura do milho.As fontes utilizadas foram uréia comum e Kincoat. Para as duas fontes foram utilizadas 5 doses(50, 100, 150, 200, 400 kg ha-1) e uma testemunha, componde assim um esquema de blocos casualizados numfatorial de 2X6...
RESUMO-O objetivo deste trabalho foi avaliar a interferência de diferentes coberturas de solo nas características agronômicas e na produtividade da cultura da soja, e mensurar a necessidade da adubação química da cultura da soja quando esta for cultivada sob diferentes coberturas, sendo estas representadas neste trabalho com os seguintes tratamento...
