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

Kendy, Eloise; Molden, David J.; Steenhuis, Tammo S.; Liu, Changming; Wang, Jinxia.

The report examines the relationships between agricultural policies in the North China Plain, the approaches to water management that evolved from them, the quantity of water that was actually used, and the consequent groundwater depletion beneath Luancheng County, Hebei Province, from 1949 to 2000. To systematically address these relationships, we use a comprehensive water-balance approach. Our results indicate that a single, longstanding policy-that of using groundwater to meet the crop-water requirements not supplied by precipitation-is responsible for the steady rate of groundwater decline.

Tipo: Report

Palavras-chave: Agricultural production; Groundwater; Aquifers; Water shortage; Irrigation efficiency; Agricultural policy; Crop production; Wastewaters; Water management; Hydrology; Economic development; Crop yield; Cotton; Wheat; Sprinkler irrigation; Water conservation; Water use efficiency; Pumping; Water balance; Vegetables; Rural economy; Irrigated framing; Community/Rural/Urban Development; Crop Production/Industries; Environmental Economics and Policy.

Ano: 2003

URL: http://purl.umn.edu/44560

Technology-Climate Interactions in the Green Revolution in India

McKinsey, James W., Jr.; Evenson, Robert E..

This paper presents a model of the Green Revolution in India, in which the development and diffusion of HYVs, the expansion of irrigation and the expansion of multiple-cropping are treated as endogenous responses to more basic investments in agricultural technology and infrastructure, as well as to climate and edaphic endowments. We incorporate explicit climate-technology interactions in the model, in order to identify climate effects on the diffusion of HYVs, irrigation and multiple-cropping, and on Net Revenue to agriculture. We find that climate affects technology development and diffusion, and that technology development and diffusion affect the impacts of climate on agricultural productivity in India.

Avaliação econômica do cultivo de trigo dos estados do Rio Grande do Sul e Paraná

Palavras-chave: Green Revolution; India; HYV; Rice; Wheat; Climate; Agricultural research; International Development; 112; 121; 226; 620; 710.

Ano: 1999

URL: http://purl.umn.edu/28452

Pereira, Matheus Wemerson Gomes; Aredes, Alan Figueiredo de; Teixeira, Erly Cardoso.

The objective of this paper is to analyze the economic viability of wheat production in the states of Rio Grande do Sul (RS) and Paraná (PR), with and without risk conditions. The applied methodology includes the indicators of economic viability Benefit-Cost, Net Present Value, Internal Rate of Return, Internal Rate of Return Modified and the application Monte Carlo method. The results suggest the wheat production is economically viable in the state of Paraná.

Tipo: Journal Article

Palavras-chave: Rio Grande do Sul; Paraná; Wheat; Economic viability; Agricultural Finance.

Ano: 2007

URL: http://purl.umn.edu/54149

The Marketing Performance of Illinois and Kansas Wheat Farmers

Dietz, Sarah N.; Aulerich, Nicole M.; Irwin, Scott H.; Good, Darrel L..

The purpose of this paper is to investigate the marketing performance of wheat farmers in Illinois and Kansas over 1982-2004. The results show that farmer benchmark prices for wheat in Illinois and Kansas fall in the middle-third of the price range about half to three-quarters of the time. Consistent with previous studies, this refutes the contention that Illinois and Kansas wheat farmers routinely market the bulk of their wheat crop in the bottom portion of the price range. Tests of the average difference between farmer and market benchmark prices are sensitive to the market benchmark considered. Marketing performance of wheat farmers in Illinois and Kansas is about equal to the market if 24- or 20-month market benchmarks are used, is slightly above the...

Constructing Farm Level Yield Densities from Aggregated Data: Analysis and Comparison of Approaches

Palavras-chave: Benchmarks; Illinois; Kansas; Marketing; Performance; Price; Wheat; Agricultural Finance.

Ano: 2008

URL: http://purl.umn.edu/37622

Cooper, Joseph C.; Langemeier, Michael R.; Schnitkey, Gary D.; Zulauf, Carl R..

Yield variability can be significantly higher at the farm level than at more aggregated levels, including the county. However, due to a dearth of available farm level data, much stochastic analysis involving farm yields utilizes more aggregated yield data as a proxy for the farm level. We empirically evaluate farm-level variability using longitudinal farm level data sets available from the Kansas Farm Management Association and the Illinois Farm Business and Farm Management Association. For corn, soybeans, and wheat, we compare the farm level yield variability obtained from this data to that inferred from Federal crop insurance premiums. The farm management data exhibit lower yield variability than are implied by the crop insurance premiums.

Efficiency tests of agricultural commodity futures markets in China

Palavras-chave: Yield variability; Crop insurance; Corn; Wheat; Soybeans; Agricultural and Food Policy; Crop Production/Industries; Research Methods/ Statistical Methods; Risk and Uncertainty.

Ano: 2009

URL: http://purl.umn.edu/49216

Wang, H. Holly; Ke, Bingfan.

The efficiency of the Chinese wheat and soybean futures markets is studied. Formal statistical tests were conducted based on Johansen’s cointegration approach for three different cashmarkets and six different futures forecasting horizons ranging from1 week to 4 months.The results suggest a long-termequilibrium relationship between the futures price and cash price for soybeans and weak short-term efficiency in the soybean futures market. The futures market for wheat is inefficient, which may be caused by overspeculation and government intervention.

Tipo: Article

Palavras-chave: Cointegration; Futures market; Price; Soybean; Wheat; Marketing; Risk and Uncertainty.

Ano: 2005

URL: http://purl.umn.edu/118441

Optimal Grazing Termination Date for Dual-Purpose Winter Wheat Production

Taylor, Karen W.; Epplin, Francis M.; Brorsen, B. Wade; Fieser, Brian G.; Horn, Gerald W..

Dual-purpose winter wheat (fall-winter forage plus grain) production is an important economic enterprise in the southern Great Plains. Grazing termination to enable grain production is a critical decision. The objective is to determine the optimal grazing termination date for dual-purpose wheat. The value of knowing the occurrence of first hollow stem (FHS), a wheat growth threshold for grazing termination, is also determined. Results indicate that for most price situations grazing should be terminated at or before FHS. Marginal wheat returns from extended grazing were negative and the value of FHS information ranges from $1.50 to $10 per acre.

Tipo: Journal Article

Palavras-chave: Dual-purpose; First hollow stem; Plateau function; Stocker cattle; Value of information; Wheat; Agribusiness; Agricultural Finance; Crop Production/Industries; Farm Management; Land Economics/Use; Livestock Production/Industries; Production Economics; Q12; Q16.

Ano: 2010

URL: http://purl.umn.edu/57148

The Value of Regional Annual Nitrogen Needs Information for Wheat Producers in Oklahoma

Roberts, David C.; Brorsen, B. Wade; Raun, William R.; Solie, John B..

Crop producers are increasingly interested in reducing nitrogen use without sacrificing yield. Technology is available for precise application at the sub-field level, but adoption has been sluggish. This paper estimates the relative profitability of a field level annual predictor of mid-season N requirements and a regional predictor of the same.

TRANSPARENCY AND BIDDING COMPETITION IN INTERNATIONAL WHEAT TRADE

Palavras-chave: Nitrogen seeds; Nitrogen use efficiency; Precision agriculture; Wheat; Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies.

Ano: 2008

URL: http://purl.umn.edu/6734

Wilson, William W.; Dahl, Bruce L.; Johnson, D. Demcey.

One of the major trade policy problems identified by U.S. interests, including grower groups, traders, and policymakers, is that of pricing transparency. This has been a gnawing issue generally related to the pricing practices of competitor exporting countries with state trading enterprises (STEs). The transparency problem generally refers to the inability to observe rivals' terms of trade (including price, quality, credit, etc.) and is normally associated with commercial exporters competing against STE rivals. The perception being the less transparent competitors (STEs) would have a strategic advantage. A game theory model of bidding competition was developed to simulate the effects of information asymmetry amongst rivals. A Bayes-Nash equilibrium...

ECONOMIC IMPACTS OF FUSARIUM HEAD BLIGHT IN WHEAT AND BARLEY: 1993-2001

Palavras-chave: Price Transparency; Strategic Bidding; Game Theory; Bayesian-Nash; State Trading Enterprises; Export Enhancement Program; Wheat; International Relations/Trade.

Ano: 1999

URL: http://purl.umn.edu/23403

Nganje, William E.; Kaitibie, Simeon; Wilson, William W.; Leistritz, F. Larry; Bangsund, Dean A..

Fusarium Head Blight (FHB), commonly known as scab, has been a severe problem for wheat and barley producers since 1993. This study provides an update of economic losses suffered by wheat and barley producers in scab-affected regions in the United States. Emphasis is placed on estimating direct and secondary economic impacts of yield and price losses suffered by wheat and barley producers from 1993 to 2001. Nine states are included in the analysis for three wheat classes. Three of the nine states were also used for the analysis of malting and feed barley. The cumulative direct economic losses from FHB in hard red spring (HRS) wheat, soft red winter (SRW) wheat, durum wheat, and barley are estimated at $2.492 billion from 1993 through 2001. The...

LOGISTICAL COSTS AND STRATEGIES FOR WHEAT SEGREGATION

Palavras-chave: Fusarium Head Blight; Scab; Vomitoxin; Crop losses; Wheat; Barley; Crop Production/Industries.

Ano: 2004

URL: http://purl.umn.edu/23627

Schlecht, Shannon M.; Wilson, William W.; Dahl, Bruce L..

Special segregations that provide unique qualities for end use products are being specified by buyers. As users of wheat become more specific about quality, the number of quality segregations that the logistical pipeline must accommodate increases. The additional cost of increased grain segregations will influence the optimal level of wheat variety segregations marketed in a supply chain. The primary objective of this research is to develop a model that captures the logistical costs of increased grain segregations in the marketing system. A simulation model was developed to add logistical uncertainty in demand, receipts, rail deliveries, and transit time. Sensitivities were conducted on certain variables to determine their effects on logistical...

ECONOMIC IMPACTS OF FUSARIUM HEAD BLIGHT IN WHEAT AND BARLEY: 1998-2000

Palavras-chave: Wheat; Segregations; Crop Production/Industries.

Ano: 2004

URL: http://purl.umn.edu/23507

Nganje, William E.; Johnson, D. Demcey; Wilson, William W.; Leistritz, F. Larry; Bangsund, Dean A.; Tiapo, Napoleon M..

Fusarium Head Blight (FHB), commonly known as scab, has been a severe problem for wheat and barley producers since 1993. This study provides an update of economic losses suffered by wheat and barley producers in scab-affected regions in the United States. Emphasis is placed on estimating direct and secondary economic impacts of yield and price losses suffered by wheat and barley producers from 1998 to 2000. Nine states are included in the analysis for three wheat classes. Three of the nine states were also used for the analysis of malting and feed barley. The cumulative direct economic losses from FHB in hard red spring (HRS) wheat, soft red winter (SRW) wheat, durum wheat, and barley is estimated at $870 million from 1998 through 2000. The combined...

GYEPHASZNOSÍTÁS ÚJSZERŰ MODELLJE KÖZÉP-SZIGETKÖZBEN

Palavras-chave: Fusarium Head Blight; Scab; Vomitoxin; Crop losses; Wheat; Barley; Crop Production/Industries.

Ano: 2001

URL: http://purl.umn.edu/23515

Crop Insurance, Disaster Payments, and Incentives for Land Use Change in Agriculture: A Preliminary Assessment

Horvath, Eszter.

A térség területhasználatában jelentkező változások követték az országos és megyei módosulásokat, ami a szántó- és gyepterületek folyamatos csökkenésében fejeződik ki. Ugyanakkor a Szigetköz tájban az egyes területi egységek terület-használata eltérően alakult. A Szigetköz hidrológiai, biológiai, talajtani adottságainak tanulmányozása rávilágít arra, hogy a táj természeti adottságai kedveznek a gyepre alapozott ál-lati termék előállításnak. A gyepterületek továbbá lehetőséget nyújtanak újszerű felhasználásra is, hozzájárulva a fenntartható, környezettudatos, tájfenntartó mezőgazdálkodás megteremtéséhez. A vizsgálatok eredményeibe a gyepművelés formáját, a legeltetendő állatfaj igényeit és tartásmódját, a gyepgazdálkodás formáját, a tájegység...

Tipo: Journal Article

Palavras-chave: Közép-Szigetköz; Állati termék; Földhasználat; Gyephasznosítási modell; EU; Region; Wheat; Corn; Collateral production average; Land Economics/Use; Livestock Production/Industries.

Ano: 2007

URL: http://purl.umn.edu/57690

Carriazo, Fernando; Claassen, Roger; Cooper, Joseph C..

SIGNIFICANCE OF WHEAT PRODUCTION IN WORLD ECONOMY AND POSITION OF HUNGARY IN IT

Palavras-chave: Crop Insurance; Disaster Payments; Supplemental Revenue Assistance; Corn; Wheat; Agricultural and Food Policy; Research Methods/ Statistical Methods; Risk and Uncertainty.

Ano: 2009

URL: http://purl.umn.edu/49218

Profitability of Conventional vs. Variable Rate Nitrogen Application in Wheat Production

Kiss, Istvan.

This article intends to introduce the significance of wheat production in world economy and role of Hungary in it on the basis of statistic database of FAO. Importance of wheat production in world economy is proven by its share of 15% from 1500 million hectares arable land in the world. This rate is equivalent to 225 million hectares of wheat area based on FAO figures for 2009. From its world economy significance viewpoint, on the basis of some significant features it sets order of ranks among wheat producing countries, accompanied by Hungary too. Setting of rank orders is based on the quantity of wheat produced by countries, cultivated area and exported, imported wheat quantity. As regards wheat export in 2008, Hungary was placed as 11. in the world while...

Tipo: Journal Article

Palavras-chave: Plant production; Wheat; Quantity produced; Export; Import; Food Security and Poverty.

Ano: 2011

URL: http://purl.umn.edu/104650

Boyer, Christopher N.; Brorsen, B. Wade; Solie, John B.; Raun, William R..

A variable rate nitrogen applicator based on optical reflectance measurements was developed to increase profits in wheat production by reducing the cost of production or by increasing grain yield. This paper determines if yields and profits from the variable rate treatments are significantly different from the conventional treatments.

MARKETING OF WHEAT ON A CONSTANT AND NIL MOISTURE BASIS

Palavras-chave: Profitability; Variable rate application; Optical reflectance sensing; Wheat; Farm Management; Production Economics.

Ano: 2010

URL: http://purl.umn.edu/56405

Wilson, William W.; Dahl, Bruce L..

This study examined moisture specification practices in the United States and for major exporters and assessed impacts of changes to a nil or constant moisture basis on prices and revenue. These were examined under scenarios where information on moisture in current prices is limited and under a scenario where current prices reflect Full Knowledge of moisture advantages. Results indicate that changing to a nil moisture basis (which requires a subsequent adjustment in volumes to reflect the subtraction of moisture) would increase reported prices from 42 to 70 c/bu for the wheat classes, while changing to a 12 percent constant moisture basis would have limited impacts on reported prices. Effects on relative prices/revenue depend on whether knowledge of...

The Performance of Chicago Board of Trade Corn, Soybean, and Wheat Futures Contracts after Recent Changes in Speculative Limits

Palavras-chave: Moisture; Specifications; Pricing; Wheat; Constant moisture; Nil moisture; Crop Production/Industries.

Ano: 2002

URL: http://purl.umn.edu/23638

Irwin, Scott H.; Garcia, Philip; Good, Darrel L..

Three attributes of futures contract behavior important for market performanceliquidity, volatility, and convergenceare investigated before and after the 2005 increase in speculative position limits for corn, soybean, and wheat contracts at the Chicago Board of Trade. The analysis of liquidity and market depth reveals a sharp increase in open interest for corn, soybeans and wheat beginning in late 2005. The increase in position limits likely accommodated the increase in speculative interest in corn, soybean and wheat futures, but some of the increase would have occurred without the increase as new market participants received hedge exemptions. The analysis of price volatility revealed no large change in measures of volatility after the change in...

OPTIMAL TESTING STRATEGIES FOR GENETICALLY MODIFIED WHEAT

Palavras-chave: Corn; Futures contract; Performance; Soybeans; Speculation; Wheat; Marketing.

Ano: 2007

URL: http://purl.umn.edu/9951

Wilson, William W.; Jabs, Eric J.; Dahl, Bruce L..

A stochastic optimization model was developed to determine optimal testing strategies, costs, and risks of a dual marketing system. The model chooses the testing strategy (application, intensity, and tolerance) that maximizes utility (minimizes disutility) of additional system costs due to testing and quality loss and allows simulation of the risk premium required to induce grain handlers to undertake a dual marketing system versus a Non-GM system. Cost elements including those related to testing, quality loss, and a risk premium were estimated for a model representing a grain export chain. Uncertainties were incorporated and include test accuracy, risk of adventitious commingling throughout, and variety declaration. Sensitivities were performed for...