SABIIA - Sistema Aberto e Integrado de Informação em Agricultura (Sabiia)

Richards, Timothy J.; Patterson, Paul M.; Hamilton, Stephen F..

Many attribute the rise in obesity since the early 1980's to the overconsumption of fast food. A dynamic model of a different-product industry equilibrium shows that a firm with market power will price below marginal cost in a steady-state equilibrium. A spatial hedonic pricing model is used to test whether fast food firms set prices in order to exploit their inherent addictiveness. The results show that firms price products dense in addictive nutrients below marginal cost, but price products high in nonaddictive nutrients higher than would be the case in perfect competition.

Tipo: Journal Article

Palavras-chave: Addiction; Brand loyalty; Fast food; Generalized method of moments; Hedonic pricing; Nutrients; Shadow values; Demand and Price Analysis; Food Consumption/Nutrition/Food Safety.

Ano: 2007

URL: http://purl.umn.edu/7077

NUTRIENT EFFECTS ON CONSUMER DEMAND: A PANEL DATA APPROACH

Dhehibi, Boubaker; Gil, Jose Maria; Angulo, Ana Maria.

The objective of this paper is to analyze the Spanish demand for food taking into account the consumer's concern about the relationship between food diet and health. This concern is forcing food demand analysts to assume that consumer utility is a function of nutrients instead of simply the food products themselves. A CBS demand model has been considered to model the new demand function obtained, which is estimated with a complete panel data set. Ten broad categories, nine nutrients and the most relevant socio-economic variables have been considered. Finally, after an appropriate model selection strategy, expenditure, price and nutrient elasticities, as well as main sociodemographic effects, have been calculated.

Towards Design For a Nutrient Trading Programme to Improve Water Quality in Lake Rotorua

Palavras-chave: Nutrients; Demand for food; CBS; Panel data; Spain.; Demand and Price Analysis; Food Consumption/Nutrition/Food Safety.

Ano: 2003

URL: http://purl.umn.edu/25881

Kerr, Suzi; Lauder, Glen; Fairman, David.

This paper explores how to enhance the role for academic research (natural sciences, economics and their integration; and stakeholder management) within the development and implementation of water quality policy in New Zealand. Our focus is on the use of market based instruments and particularly nutrient trading programmes, which are one important part of the potential tool kit to address these issues. We discuss why nutrient trading might be an appropriate instrument for the Lake Rotorua catchment. We survey the existing literature and then outline the outstanding scientific, economic and governance questions that need to be addressed to design an effective trading programme. Finally we discuss how to design a process to address these questions drawing on...

Dietary Assessment of Major Trends in U.S. Food Consumption, 1970-2005

Palavras-chave: Water quality; Emissions trading; Non-point source pollution; Nutrients; Rotorua; Communication; Learning; Resource /Energy Economics and Policy; Q53; Q57; Q58; A12.

Ano: 2007

URL: http://purl.umn.edu/9462

Wells, Hodan Farah; Buzby, Jean C..

This report examines major trends in the amount of food available for consumption in the United States between 1970 and 2005 using data from the ERS Food Availability (Per Capita) Data System. The report also estimates whether Americans are meeting Federal dietary recommendations for each of the major food groups by comparing the data with dietary recommendations in the 2005 Dietary Guidelines for Americans and the MyPyramid Food Guidance System. Findings show that Americans do not meet the Federal dietary recommendations. In order to meet them, Americans would need to substantially lower their intake of added fats, refined grains, and added sugars and sweeteners and increase their consumption of fruits, vegetables, whole grains, and lowfat milk and milk...

Tipo: Report

Palavras-chave: Agriculture; Added fats and oils; Added sugars and sweeteners; Dairy; Dietary Guidelines for Americans; Dietary recommendations; Eggs; Food; Food consumption; Fruits; Meat; MyPyramid Food Guidance System; Nutrients; Grains; Nuts; Vegetables.; Agricultural and Food Policy; Food Consumption/Nutrition/Food Safety.

Ano: 2008

URL: http://purl.umn.edu/58641

Rural-urban food, nutrient and virtual water flows in selected West African cities

Drechsel, Pay; Graefe, Sophie; Fink, Michael.

Impacts of increasing population pressure on food demand and land and water resources have sparked interest in nutrient and water balances and flows at a range of scales. In IWMI Research Report 115, it was tried for the first time to quantify rural-urban food flows for selected cities in Ghana and Burkina Faso to analyse their dependency on food supplied from rural vs. peri-urban vs. urban farming. Both, the urban nutrient and water footprints are closely interlinked. Currently, 80-95 percent of the domestic water used and the nutrients consumed go to waste without treatment or resource recovery. The economic dimensions are significant. Options to reduce the environmental burden by closing the rural-urban water and nutrient cycles are discussed.

Tipo: Report

Palavras-chave: Food consumption; Water quality; Nutrients; Urban agriculture; Food production; Agricultural and Food Policy; Community/Rural/Urban Development; Crop Production/Industries; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; Land Economics/Use.

Ano: 2007

URL: http://purl.umn.edu/44518

CONFINED ANIMAL PRODUCTION AND MANURE NUTRIENTS

Gollehon, Noel R.; Caswell, Margriet; Ribaudo, Marc; Kellogg, Robert L.; Lander, Charles; Letson, David.

Census of agriculture data were used to estimate manure nutrient production and the capacity of cropland and pastureland to assimilate nutrients. Most farms (78 percent for nitrogen and 69 percent for phosphorus) have adequate land on which it is physically feasible to apply the manure produced onfarm at agronomic rates. (The costs of applying manure at these rates have not been assessed). Even so, manure that is produced on operations that cannot fully apply it to their own land at agronomic rates accounts for 60 percent of the Nation's manure nitrogen and 70 percent of the manure phosphorus. In these cases, most counties with farms that produce "excess" nutrients have adequate crop acres not associated with animal operations, but within the county, on...

Tipo: Report

Palavras-chave: Manure; Nutrients; Manure nutrients; Animal waste; Confined livestock; Confined animal feeding operation; CAFO; Feedlot beef; Dairy cows; Swine; Poultry; Animal unit; Manure nitrogen; Manure phosphorus; Water quality; Livestock Production/Industries.

Ano: 2001

URL: http://purl.umn.edu/33763

An Index to Measure Health Status

Lee, Jonq-Ying; Rampersaud, Gail S.; Brown, Mark G..

In this study we developed a health status index using the commonly recorded health measures by doctors and hospitals. This health status index has a minimum possible value of 7 (the least healthy) and a maximum value of 21 (the healthiest). Using the NHANES data, we explored the relationship of this health status index and nutrient intakes, lifestyle, and demographics of the respondent. Regression results showed that as the age of the respondent, being non-Hispanic black, participants of food stamp programs, high percent of calories that came from fat intakes, high percent of calories in beverages that came from soft drinks, smoking, and on special diets are negatively related to the value of the health status index (i.e., the person became less...

Tipo: Report

Palavras-chave: Health index; HNANES; Nutrients; Food Consumption/Nutrition/Food Safety.

Ano: 2008

URL: http://purl.umn.edu/36819

Obesity and Nutrient Consumption: A Rational Addiction?

Richards, Timothy J.; Patterson, Paul M.; Tegene, Abebayehu.

Widespread obesity in the U.S. is a relatively recent phenomenon, reaching epidemic proportions only in the last 15 years. However, existing research shows that while calorie expenditure through physical activity has not changed appreciably since 1980, calorie consumption has risen dramatically. Consequently, any explanation of obesity must address the reason why consumers tend to overeat in spite of somewhat obvious future health implications. This study tests for an addiction to food nutrients as a potential explanation for the obesity epidemic. Specifically, we use a random coefficients (mixed) logit model applied to household scanner data to test a multivariate version of the rational addiction model of Becker and Murphy and Chaloupka. We find evidence...

Tipo: Working or Discussion Paper

Palavras-chave: Addiction; Demand; Mixed logit; Nutrients; Obesity.; Food Consumption/Nutrition/Food Safety.

Ano: 2004

URL: http://purl.umn.edu/28539

FAT TAX: A POLITICAL MEASURE TO REDUCE OVERWEIGHT? THE CASE OF GERMANY

Thiele, Silke.

Using an Almost Ideal Demand System food price elasticities for German households are calculated. These elasticities serve as a basis to simulate the effect of the substitutions of different food types due to a tax on saturated fat. The change of food structure causes effects on the energy and nutrient supply of individuals as well as, on consumer welfare. These effects are analyzed for different German household groups. It is found that decreases in energy and fat intake are small but potentially effective especially for low-income households. However, due to the collateral decrease of nutrients which Germans have deficient supply of, the total health effects of a fat tax remain unclear. Furthermore the results show that low-income groups would bear...

Effects of food prices and consumer income on nutrient availability: An application of the demand for dairy products in Tunisia

Palavras-chave: Fat tax; Foods; Nutrients; Welfare effects; Almost Ideal Demand System; Agricultural and Food Policy; Consumer/Household Economics; Demand and Price Analysis; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; Health Economics and Policy; D12; Q18; P46; I12.

Ano: 2010

URL: http://purl.umn.edu/116393

Dhehibi, Boubaker; Laajimi, Abderraouf.

Number of Tunisian food demand studies have measured the influence of traditional variables, such as income and prices, and in some cases some socio-demographic variables. However, given increasing concerns about health, other important factors, such as the nutritious quality and the nutrient content of food, have also been shown to determine consumer choices. This paper analyses the effect of these factors on the demand for dairy products. The nutritious quality of dairy products is measured by an index that relates nutrient content of each product with the standards suggested by the National Academy of Science. A demand system is estimated and nutrient demand elasticities with respect to prices and expenditure are obtained. Results differ from...

Tipo: Journal Article

Palavras-chave: Dairy products demand; Health awareness; Nutrients; Price/quality index; Tunisia; Agricultural and Food Policy; D12; I12.

Ano: 2009

URL: http://purl.umn.edu/57279

An Evaluation of Nutrient Trading Options in Virginia: A Role for Agriculture?

Stephenson, Kurt; Aultman, Stephen; Metcalfe, Todd; Miller, Alex.

Water quality trading programs: A comparison between the Northern and Southern Hemispheres

Palavras-chave: Water Quality Trading; Offsets; Nutrients; Agriculture; BMPs; Environmental Economics and Policy.

Ano: 2009

URL: http://purl.umn.edu/46779

Greenhalgh, Suzie; Selman, Mindy.

Water quality trading is continually being explored and implemented to improve water quality in many parts of the world. They are being used to cost-effectively reduce point and/or non-point source obligations to meet water quality goals such as nutrient discharge limits. A comparison between evolving trading programs in New Zealand and some in North America illustrate a number of differences as well as similarities in terms of the successes and hurdles. These can be used to better design more effective programs.

Digestibility and Physicochemical Characteristics of Tambaqui Waste Biological Silage Meal Included in Commercial Layer Diets*

Palavras-chave: Water quality; Trading; Nutrients; Market-based; Non-point source; Point source; Environmental Economics and Policy.

Ano: 2008

URL: http://purl.umn.edu/6028

Rev. Bras. Ciênc. Avic.

Guimarães,CC; Silva,AJI; Cruz,FGG; Rufino,JPF; Silva,AF; Costa,VR.

ABSTRACT This study aimed at evaluating the effects of the physicochemical and nutritional characteristics of a biological silage meal made of tambaqui waste on dietary nutrient apparent digestibility and energy metabolism of commercial layer diets. Seventy-two 61-week-old Hisex White hens were assigned according to a completely randomized experimental design in two treatments: control diet and diet with 5% tambaqui waste biological silage meal (TWBSM), with six replicates of six birds each. The ensiled biomass presented grey brown color, acid aroma, viscous texture, 5.27±0.016pH, 96.28% dry matter (DM), 33.29% crude protein (CP), 33.65% ether extract (EE), 14.37% ashes, 13.63% non-nitrogen extract (NNE), 65.16 g.kg-1 calcium (Ca), 22.90 g.kg-1 phosphorus...

HEAVY METALS AND MICRONUTRIENTS IN THE SOIL AND GRAPEVINE UNDER DIFFERENT IRRIGATION STRATEGIES

Palavras-chave: Alternative food; Fish waste; Metabolizable energy; Nutrients; Silage.

Ano: 2019

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2019000300321

Oliveira,Vanessa de Souza; Lima,Augusto Miguel Nascimento; Salviano,Alessandra Monteiro; Bassoi,Luís Henrique; Pereira,Giuliano Elias.

Soils under natural conditions have heavy metals in variable concentrations and there may be an increase in these elements as a result of the agricultural practices adopted. Transport of heavy metals in soil mainly occurs in forms dissolved in the soil solution or associated with solid particles, water being their main means of transport. In this context, the aim of this study was to evaluate the heavy metal and micronutrient content in the soil and in the grapevine plant and fruit under different irrigation strategies. The experiment was carried out in Petrolina, PE, Brazil. The treatments consisted of three irrigation strategies: full irrigation (FI), regulated deficit irrigation (RDI), and deficit irrigation (DI). During the period of grape maturation,...

Quality of surface water related to land use: a case study in a catchment with small farms and intensive vegetable crop production in southern Brazil

Palavras-chave: Water availability; Nutrients; Grape.

Ano: 2015

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000100162

Ribeiro,Karina Hacke; Favaretto,Nerilde; Dieckow,Jeferson; Souza,Luiz Cláudio de Paula; Minella,Jean Paolo Gomes; Almeida,Luciano de; Ramos,Michele Ribeiro.

Water degradation is strongly related to agricultural activity. The aim of this study was to evaluate the influence of land use and some environmental components on surface water quality in the Campestre catchment, located in Colombo, state of Parana, Brazil. Physical and chemical attributes were analyzed (total nitrogen, ammonium, nitrate, total phosphorus, electrical conductivity, pH, temperature, turbidity, total solids, biological oxygen demand, chemical oxygen demand and dissolved oxygen). Monthly samples of the river water were taken over one year at eight monitoring sites, distributed over three sub-basins. Overall, water quality was worse in the sub-basin with a higher percentage of agriculture, and was also affected by a lower percentage of native...

Chemical properties of soils treated with biological sludge from gelatin industry

Palavras-chave: Water pollution; Agriculture; Nutrients; Micro watershed.

Ano: 2014

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000200030

Guimarães,Rita de Cássia Melo; Cruz,Mara Cristina Pessôa da; Ferreira,Manoel Evaristo; Taniguchi,Carlos Alberto Kenji.

The impact of agro-industrial organic wastes in the environment can be reduced when used in agriculture. From the standpoint of soil fertility, residue applications can increase the organic matter content and provide nutrients for plants. This study evaluated the effect of biological sludge from gelatin industry on the chemical properties of two Ultisols (loamy sand and sandy clay) and an Oxisol (clay). The experiment lasted 120 days and was carried out in laboratory in a completely randomized design with factorial arrangement, combining the three soils and six biological sludge rates (0, 100, 200, 300, 400, and 500 m³ ha-1), with three replications. Biological sludge rates of up to 500 m³ ha-1 decreased soil acidity and increased the effective cation...

Soil fertility, organic carbon and fractions of the organic matter at different distances from eucalyptus stumps

Palavras-chave: Waste; Nutrients; Soil pH; Effective CEC.

Ano: 2012

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000200034

Faria,Geraldo Erli; Barros,Nairam Félix de; Novais,Roberto Ferreira; Silva,Ivo Ribeiro.

Knowledge on variations in vertical, horizontal and temporal characteristics of the soil chemical properties under eucalyptus stumps left in the soil is of fundamental importance for the management of subsequent crops. The objective of this work was to evaluate the effect of eucalyptus stumps (ES) left after cutting on the spatial variability of chemical characteristics in a dystrophic Yellow Argisol in the eastern coastal plain region of Brazil. For this purpose, ES left for 31 and 54 months were selected in two experimental areas with similar characteristics, to assess the decomposition effects of the stumps on soil chemical attributes. Soil samples were collected directly around these ES, and at distances of 30, 60, 90, 120 and 150 cm away from them, in...

Chlorophyll index for real-time prediction of nutritional status of 'Prata' banana

Palavras-chave: Nutrients; Humic substances; Spatial variability.

Ano: 2009

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832009000300010

AGRIAMBI

Arantes,Alessandro de M.; Donato,Sérgio L. R.; Siqueira,Dalmo L. de; Amorim,Edson P.; Rodrigues Filho,Vagner A..

ABSTRACT This study aimed to select regression equations based on the correlation between chlorophyll index and leaf nutrient contents, for real-time prediction of the nutritional status of 'Prata' banana. Six cultivars of 'Prata' banana were used as treatments, with five replicates and four plants per plot, arranged in a completely randomized design. Nutrient levels were evaluated based on laboratorial analysis and chlorophyll indices using a portable chlorophyll meter, in the third leaf from the apex to the base. Data were subjected to analysis of variance, calculating the correlations between leaf nutrient contents and chlorophyll indices, and the regression equations were adjusted to the associations that were significant and with greater magnitude....

Substrates and controlled-release fertilizations on the quality of eucalyptus cuttings

Palavras-chave: Musa spp.; Cultivars; Nutrients; Chlorophyll.

Ano: 2016

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000200099

AGRIAMBI

Silva,Richardson B. G. da; Silva,Magali R. da; Simões,Danilo.

To produce cuttings with quality, the most appropriate nutritional management strategies should be sought to reduce wastage of fertilizer, while accounting for the characteristics of each substrate. This study evaluated the effect of substrates and doses of controlled-release fertilizer on the quality of Eucalyptus grandis Hill ex Maiden x Eucalyptus urophylla S. T. Blake cuttings. The substrates consisted of several mixtures: vermiculite+carbonized rice chaff+coconut fibre (1:1:1); vermiculite+coconut fibre (1:1); and vermiculite+carbonized rice chaff (1:1). These mixtures were added to 2, 4, 6 and 8 kg of controlled-release fertilizer per cubic meter of substrate. The substrates that do not support root development and have lower water retention,...

Dry matter and macronutrient extraction curves of potato varieties in the Alto Paranaíba region, Brazil

Palavras-chave: Nutrients; Fertilizer; Root system; Water retention; Forest nursery.

Ano: 2014

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662014001100005

AGRIAMBI

Silva,Carlos D. da; Soares,Maria E. P.; Ferreira,Miller H.; Cavalcante,Alian C. P.; Andrade,Guilherme A. V. de; Aquino,Leonardo A. de.

ABSTRACT Information on plant nutrient extraction is of utmost importance for the management of fertilization in crops. The objective of the study was to determine the accumulation of dry matter mass in the tubers and aerial parts of the plants and to generate absorption curves of macronutrients N, P, K, Ca and Mg for the potato varieties Ágata, Asterix, Atlantic and Taurus. The shoot and tuber samples were collected at 6, 13, 54, 66, 70, 82 and 97 days after planting. The highest accumulation of dry matter was observed in the Asterix and Atlantic varieties. The varieties Asterix and Atlantic showed higher N and K extraction and, consequently, higher productivity, while Taurus and Ágata presented lower yields and nutrient extraction. The period of greatest...