Emerson SouzaUniversity of Minnesota Twin Cities | UMN · Department of Soil, Water, and Climate
Emerson Souza
PhD in Agronomy
About
28
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Introduction
Emerson does research in Soil Science, Agronomy and Agricultural Plant Science.
Publications
Publications (28)
Nitrification can lead to substantial losses of the applied N through nitrate leaching and N 2 O emission. The regulation of nitrification may be a strategy to improve fertilizer N recovery and increase its agronomic efficiency. The objective of this study was to evaluate the inhibiting capacity of nitrification in soil by Brachiaria species. The g...
Crop nitrogen (N) status monitoring is required as a decision-making tool to optimize N management of current potato cultivars (Solanum tuberosum L.). Field experiments were conducted to assess the leaf N concentration (LNC) as a diagnostic tool of the N status of potatoes grown in tropical environments of southeastern Brazil. Treatments consisted...
The high seed yield and optimum harvesting of short‐height castor genotypes have enabled its large‐scale cultivation and introduction in the Brazilian cropping systems. Thus, studies to optimize plant density are essential to adequate plant population since this is the key management to influence castor biomass and seed production. This study aimed...
BACKGROUND
Potato is an essential crop for global food security, and its cultivation requires significant amount of readily available nitrogen (N) to ensure tuber quality. Therefore, managing N with enhanced-efficiency fertilizers becomes a potential strategy to meet the seasonal potato N demand. A 3 site-years (SYs) study was conducted to assess t...
Dicyandiamide (DCD) is a nitrification inhibitor (NI) used to reduce reactive nitrogen (N) losses from soils. While commonly used, its effectiveness varies widely. Few studies have measured DCD and temperature effects on a complete set of soil N variables, including nitrite (NO2⁻) measured separately from nitrate (NO3⁻). Here the DCD reduction effi...
Potato (Solanum tuberosum L.) production in irrigated coarse-textured soils requires intensive nitrogen (N) fertilization which may increase reactive N losses. Biological soil additives including N-fixing microbes (NFM) have been promoted as a means to increase crop N use efficiency, though few field studies have evaluated their effects, and none h...
Potato (Solanum tuberosum L.) is a nitrogen (N) intensive crop, and meeting its requirements with N fertilization is the primary practice to improve N recovery and achieve suitable tuber yield. A 3‐site‐year (SY) study was conducted to assess SPAD‐502 chlorophyll meter efficacy for providing potato leaf real‐time N status to adjust N timing and rat...
The quantification of nutrient uptake and partitioning during crop cultivation, as well as nutrients removed at harvest, are essential information to optimize nutrient management. A 2‐yr field experiment was conducted in Botucatu, São Paulo State, southeastern Brazil, to examine the biomass accumulation and nutritional requirements and removal of t...
Urea is the dominant nitrogen (N) fertilizer used for potato (Solanum tuberosum L.) cultivation in most parts of the world. Fertilizers containing a nitrification inhibitor (NI) claim to improve performance of crops including potato. No studies to date have conducted comprehensive assessment of N sources and the effectiveness of NI under varying N...
This book on the physiology of vegetable crops focuses on the activities and functions of vegetables, defined as herbaceous plants that are harvested for edible parts that can be consumed fresh or with little preparation. Physiology deals with the growth and development processes of these plants, and while this book is focused primarily on the orga...
Urea is the dominant form of nitrogen (N) fertilizer used globally. Various additives have been designed for co-application with urea to improve performance of N-intensive crops including potato (Solanum tuberosum L.). Few if any studies have compared ‘inhibitor’ additives with ‘biostimulants’ designed to enhance plant growth or microbial activity....
A suitable N source and an optimal application rate can improve the N-use efficiency of potato (Solanum tuberosum L.) while minimizing N losses, especially when potato is grown in sandy soils. Three experiments were conducted at irrigated sandy soil sites in São Paulo State, Brazil, to evaluate the effects of ammonium sulfate (AMS), ammonium sulfat...
This study evaluated the effect of nitrogen fertilization rates on the characteristics of potato starch. The experimental design was randomized block with four replications. The treatments were composed of four rates of N (0, 80, 120 and 160 kg ha⁻¹). After 117 days of planting the harvested tubers were sanitized and the starch extracted. The starc...
The objective of this work was to evaluate the effect of plant densities and sidedressed nitrogen (N) rates on nutrition and productive performance of the common bean cultivars IPR 139 and Pérola. For each cultivar, a randomized complete block experimental design was used in a split-plot arrangement, with three replicates. Plots consisted of three...
Studies in the past decades have focused on how tuber yield of potato grown on different types of soil is affected by phosphate fertilizer rates. However, little is known about the effects of phosphorus availability in the soil and of phosphate fertilization on nutrient uptake and removal by the main potato cultivars currently grown in Brazil. Thus...
Ruzigrass (Brachiaria ruziziensis, syn. Urochloa ruziziensis) is used as a cover crop in tropical regions because it has a high yield potential, is widely adapted and has a vigorous root system. However, it may affect early growth of the next crop due to allelopathy and competition for soil nitrate. A greenhouse experiment was conducted in glass-wa...
Ruzigrass (Brachiaria ruziziensis, syn. Urochloa ruziziensis) is used as a cover crop in tropical regions because it has a high yield potential, is widely adapted and has a vigorous root system. However, it may affect early growth of the next crop due to allelopathy and competition for soil nitrate. A greenhouse experiment was conducted in glass-wa...
Common bean grown in no-tillage (NT) systems has increased markedly in Brazil. Thus, to optimize the fertilizer recommendations, it is important to know the nutritional requirements of this crop when grown under new and established NT systems, which can change the nutrient availability and crop response to nitrogen (N) fertilization. The objective...
Correct nitrogen fertilization is essential for potato (Solanum tuberosum L.) cultivation because its undeveloped root system are not able to uptake excessive nitrogen rate applications. This surplus of nitrogen applied in the soil will be lost by leaching and volatilization resulting not only in environmental pollution but also in economic losses,...
The interest in crambe (Crambe abyssinica ) cultivation in Brazil is on the rise, whereas information on the nutrient requirements for this crop is scarce. The objective of this work was to evaluate the effect of nitrogen-phosphorus-potassium (N-P2O5-K2O formula 8:28:16) fertilization (0, 150, and 300 kg ha-1) on crambe shoot biomass production, gr...
The interest in crambe (Crambe abyssinica) cultivation in Brazil is on the rise, whereas information on the nutrient requirements for this crop is scarce. The objective of this work was to evaluate the effect of nitrogen-phosphorus-potassium (N-P2O5-K2O formula 8:28:16) fertilization (0, 150, and 300 kg ha-1) on crambe shoot biomass production, gra...
Common bean plant demanding higher amounts of nitrogen (N), but are scarce information about common bean N demanding when grown after maize intercropped with palisade grass. The purpose of this study was to evaluate the effect of N fertilization in common bean grown under no-tillage system, in succession to out-of-season maize intercropped with Uro...
A adequada disponibilidade de N durante do ciclo do feijoeiro é fundamental para garantir elevada produtividade e qualidade dos grãos produzidos. Esse nutriente pode ser absorvido pelas raízes e folhas da planta. Contudo, ainda existem dúvidas sobre a eficiência da aplicação via foliar de N no feijoeiro e sobre a influência dessa prática na qualida...
COMMON BEAN GRAIN YIELD AND QUALITY AS AFFECTED BY NITROGEN SIDEDRESSING AND LEAF APPLICATION Appropriate nitrogen availability during the common bean cycle is essential to ensure high grain yield and quality. This nutrient can be absorbed by the roots and leaves. However, there are still doubts about the efficiency of N leaf application and the in...
Regarding tropical forage plants, the specie Brachiaria ruziziensis are prominence for to be most acceptable for cattle when compared with others Brachiaria species, besides the excellent competitive ability with weeds. Then, this study aimed to evaluate the effects of Brachiaria ruziziensis density in intercropping with corn crop, about weeds cont...
O objetivo deste trabalho foi avaliar o efeito de doses de nitrogênio (N) e de inoculação de Rhizobium tropici em feijoeiro cultivado no sistema plantio direto, em sucessão ao milho safrinha consorciado com Urochloa brizantha (Syn. Brachiaria bryzantha) ou Urochloa ruziziensis (Syn. Brachiaria ruziziensis). Dois experimentos foram conduzidos, duran...
O objetivo deste trabalho foi avaliar o efeito de doses de nitrogênio (N) e de inoculação de Rhizobium tropici em feijoeiro cultivado no sistema plantio direto, em sucessão ao milho safrinha consorciado com Urochloa brizantha (Syn. Brachiaria bryzantha) ou Urochloa ruziziensis (Syn. Brachiaria ruziziensis). Dois experimentos foram conduzidos, duran...
Experimental research suggest that even when sowed after soybean harvest, out-of-season corn yield can be increased with nitrogen sidedressing fertilization. However, doubts still exist about nitrogen source and dose for corn in the growing modality. The objective of this work was to evaluate the effect of sources and doses of sidedressed nitrogen...
Projects
Projects (2)
Please submit your papers to the new Special Issue "New Approaches for Effective Nutrient Management in Potato Cropping Systems"!
Guest Editors:
Dr. Emerson F. C. Souza
Department of Soil, Water, and Climate, University of Minnesota, St. Paul, MN 55108, USA
Prof. Dr. Carl J. Rosen
Department of Soil, Water, and Climate, University of Minnesota, St. Paul, MN 55108-6028, USA
Prof. Dr. Rogério P. Soratto
Dept. of Crop Science, College of Agricultural Sciences, São Paulo State University (UNESP), Botucatu, SP, Brazil & Center of Tropical Roots and Starches, São Paulo State University (UNESP), Botucatu, SP, Brazil
More information: https://lnkd.in/gZ8JR2d
