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| Chaim,Aldemir; Pessoa,Maria Conceição Peres Young; Camargo Neto,João; Hermes,Luiz Carlos. |
| The main objective of this work was to compare two methods to estimate the deposition of pesticide applied by aerial spraying. Hundred and fifty pieces of water sensitive paper were distributed over an area of 50 m length by 75 m width for sampling droplets sprayed by an aircraft calibrated to apply a spray volume of 32 L/ha. The samples were analysed by visual microscopic method using NG 2 Porton graticule and by an image analyser computer program. The results reached by visual microscopic method were the following: volume median diameter, 398±62 mum; number median diameter, 159±22 mum; droplet density, 22.5±7.0 droplets/cm² and estimated deposited volume, 22.2±9.4 L/ha. The respective ones reached with the computer program were: 402±58 mum, 161±32 mum,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agricultural chemicals; Aerial application; Application methods; Density; Volume. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2002000400010 |
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| Hall, R. Lee; Dorfman, Jeffrey H.; Gunter, Lewell F.. |
| Three models of spatial competition are tested on retail price data for the agricultural chemical industry. Three empirical tests find no evidence of any spatial competition using data from sixty-five retailers and twelve different chemicals. Demand and supply-side variables have statistically significant, but economically trivial impacts on retail chemical prices. These results point to a virtually complete control of retail prices by the chemical manufacturers, likely through the rebate program they offer retailers. The oligopoly structure of the chemical manufacturing industry makes such control possible. The results suggest that consolidation of retailers or distributors will not have anti-competitive effects since price competition is essentially... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Agricultural chemicals; Market power; Spatial competition; Industrial Organization. |
| Ano: 2003 |
URL: http://purl.umn.edu/18984 |
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| Fuglie, Keith O.; Heisey, Paul W.; King, John L.; Day-Rubenstein, Kelly A.; Schimmelpfennig, David E.; Wang, Sun Ling. |
| Meeting growing global demand for food, fiber, and biofuel requires robust investment in agricultural research and development (R&D) from both public and private sectors. This study examines global R&D spending by private industry in seven agricultural input sectors, food manufacturing, and biofuel and describes the changing structure of these industries. In 2007 (the latest year for which comprehensive estimates are available), the private sector spent $19.7 billion on food and agricultural research (56 percent in food manufacturing and 44 percent in agricultural input sectors) and accounted for about half of total public and private spending on food and agricultural R&D in high-income countries. In R&D related to biofuel, annual... |
| Tipo: Technical Report |
Palavras-chave: Agricultural biotechnology; Agricultural chemicals; Agricultural inputs; Animal breeding; Animal health; Animal nutrition; Aquaculture; Biofuel; Concentration ratio; Crop breeding; Crop protection; Farm machinery; Fertilizers; Herfindahl index; Globalization; Market share; Market structure; Research intensity; Seed improvement; Productivity Analysis. |
| Ano: 2011 |
URL: http://purl.umn.edu/120324 |
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