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| Registros recuperados: 1.923 | |
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| Duennebier, Fk; Stephen, R; Gettrust, Jf; Avedik, Felix; Ballard, J Alan; Bibee, L Dale; Fehler, Michael; Inderbitzen, Anton; Jacobsen, Randall; Pascal, Georges. |
| Tipo: Text |
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| Ano: 1987 |
URL: http://archimer.ifremer.fr/doc/00318/42927/42428.pdf |
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| Silva,Nelson Machado da; Carvalho,Luiz Henrique; Hiroce,Ruter; Quaggio,José Antonio. |
| Após o quarto ano de condução de um ensaio permanente de calagem e de adubação mineral com o algodoeiro, iniciado em 1974 em um latossolo roxo ácido, argiloso (66%) e rico em matéria orgânica (4,1%), no município de Guaíra, SP, reaplicou-se o calcário. Utilizaram-se as mesmas doses da primeira fase (1,5, 3,0 e 6,0 t/ha), exceto nas parcelas testemunhas, onde se fez uma calagem mínima com 1,5 t/ha. A adubação mineral teve continuidade com aplicações anuais de 60 kg/ha de N (sulfato de amônio) e P x K, em esquema fatorial, nas doses de 0, 60 e 120 kg/ha de P2O5 (superfosfato simples) e 40 e 80 kg/ha de K2O (cloreto de potássio). Por falta de resposta significativa do algodoeiro a potássio, não se considerou o efeito do referido nutriente. No tratamento com a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Calcário dolomítico; Superfosfato simples; Calagem e fósforo; Correlação; Lixiviação de bases e análise foliar. |
| Ano: 1987 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051987000200018 |
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| Alston, Julian M.; Scobie, Grant M.. |
| The Common Agricultural Policy increases European poultry production costs, prohibits imports, increases domestic prices, and subsidizes exports. This policy has displaced some U.S. exports. However, the net impact in the U.S. has been quite modest, even assuming poultry is homogeneous, independent of source country. Costs to U.S. producers are almost entirely offset by gains to U.S. consumers. Effects in the U.S. are even smaller when imperfect substitutability between poultry from different countries is accounted for. A retaliatory U.S. export subsidy would have more dramatic effects in U.S. markets. |
| Tipo: Journal Article |
Palavras-chave: International Relations/Trade. |
| Ano: 1987 |
URL: http://purl.umn.edu/29306 |
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| Garoian, Lee; Conner, J. Richard; Scifres, C.J.. |
| McCartney rose is a range management problem on 500,000 acres of rangeland in Texas. Roller chopping followed by burning is an effective method of improving infested rangeland. However, uncertainty associated with implementing effective burns adversely affects economic feasibility of the treatment sequence. Discrete stochastic programming is used to determine optimal burning schedules under uncertainty. Optimal schedules and expected net returns vary with changes in the probability of a successful burn. |
| Tipo: Journal Article |
Palavras-chave: Resource /Energy Economics and Policy. |
| Ano: 1987 |
URL: http://purl.umn.edu/30208 |
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| Ahmadi-Esfahani, Fredoun Z.; Carter, Colin A.. |
| The economics of a higher loan rate to support US wheat prices is analysed. Utilising optimal control theory, a dynamic wheat trade model is developed. The basic premise underlying the model is that the United States finds itself having transient monopoly power in the wheat market. An expression for the optimal pricing policy which maximises the present value of expected profits over the indefinite future is derived. Results from both the theoretical and empirical models demonstrate that the US wheat pricing strategy depends on its costs relative to competitors' costs, the discount rate and the competitors' response function. The main policy implication of the analysis is for the dominant wheat exporting country constantly to seek to lower costs relative... |
| Tipo: Journal Article |
Palavras-chave: Demand and Price Analysis. |
| Ano: 1987 |
URL: http://purl.umn.edu/22269 |
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| Beck, Anthony C.; Dent, J. Barry. |
| The development of a simulation model of an extensive pastoral farming system to assist analysts in their assessment of government policy measures is described. The model was designed to simulate, over a number of years, the physical and financial operation of a sheep and beef production system typically found in the North Island hill country of New Zealand. By manipulating model parameters and data related to prices, costs, taxation and credit, a range of policies can be represented and their effects simulated. The model is used to undertake an ex post analysis of the farm-level impact of the supplementary minimum price scheme in New Zealand and to project farm performance following the abolition of the scheme. Consideration is given to the use of the... |
| Tipo: Journal Article |
Palavras-chave: Productivity Analysis. |
| Ano: 1987 |
URL: http://purl.umn.edu/22580 |
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| Gempesaw, Conrado M., II; Reisner, G.C.; Wobus, P.J.. |
| Previous studies analyzing the U.S. food industry have used national data and/or have focused on a particular sector of the industry. However, regional differences in resource endowments, income opportunities and population distribution imply that the impact of changing economic environment will not be the same for all regions. A farm to retail multiproduct sectoral model for the Northeast food industry is developed and estimated. This regional approach is used to analyze the effects of changes in exogenous variables on the Northeast region's food production and consumption. Empirical results are presented in terms of intrasectoral flexibilities and elasticities. Selected results from other regions are also presented and compared with the Northeast... |
| Tipo: Journal Article |
Palavras-chave: Industrial Organization. |
| Ano: 1987 |
URL: http://purl.umn.edu/28983 |
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| Drynan, Ross G.. |
| The notion of dominance most familiar to agricultural economists is perhaps the decision theoretic concept entailed in comparing one risky prospect to others. But dominance concepts are also relevant in the linear programming context, for example in identifying redundant constraints. In this note, the standard concept of dominance in linear programming is generalized by defining dominance with respect to differing levels of information about the programming problem. |
| Tipo: Journal Article |
Palavras-chave: Research Methods/ Statistical Methods. |
| Ano: 1987 |
URL: http://purl.umn.edu/12358 |
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| Registros recuperados: 1.923 | |
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