|
|
|
|
|
| Frizzone,J.A.; Coelho,R.D.; Dourado-Neto,D.; Soliani,R.. |
| The main objective of this paper was to develop a separable linear programming model, considering a set of technical factors which may influence the profit of an irrigation project The model presents an objective function that maximizes the net income and specifies the range of water availability. It is assumed that yield functions in response to water application are available for differents crops and describe very well the water-yield relationships. The linear programming model was developed genetically, so that, the rational use of the available water resource could be included in an irrigation project Specific equations were developed and applied in the irrigation project "Senator Nilo Coelho" (SNCP), located in Petrolina - Brazil Based on the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Irrigation; Linear programming model. |
| Ano: 1997 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161997000300016 |
| |
|
|
| Frizzone,J.A.; Botrel,T.A.; Arce,R.A.B.; Péres,F.C.. |
| Com o objetivo de desenvolver um modelo de programação linear para simular os níveis das atividades do processo de produção, utilizou-se o sistema de produção da fazenda Lagoa do Fogão, propriedade da família Sakai, localizada no município de Guaíra,SP, com um total de 207 ha irrigados por três sistemas de irrigação do tipo pivô-central. A função objetivo consistiu em maximizar o lucro da propriedade agrícola, utilizando as culturas de inverno tradicionalmente cultivadas nessa propriedade, sob regime de irrigação, a saber: tomate industrial, trigo, batata, ervilha e feijão. As restrições foram quanto à disponibilidade de terra, água e mercado. Os resultados obtidos, permitiram as seguintes conclusões: (a) na área sob o pivô-central 1 deve-se cultivar... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Programação linear; Alocação de água; Pivô-central. |
| Ano: 1994 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161994000300026 |
| |
|
|
| Faria,R.T. de; Folegatti,M.V.; Frizzone,J.A.; Saad,A.M.. |
| The economical benefits of different irrigation strategies were assessed by long term simulation (20 years) for dry beans in Paraná, Brazil. The model BEANGRO was used to simulate crop yield and irrigation requirements assuming eight levels of irrigation threshold (20 to 90% of the remaining soil available water in steps of 10%), in addition to a level considering no irrigation. Net return was the objective function to select the optimum irrigation management strategy, assuming fixed and stochastic distributions of historical product price. The results showed that yield was significantly increased by irrigation despite a high variability for all the simulation strategies, due to variations on growth conditions over the years. Although the net return was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Irrigation; Modeling; Economical analysis. |
| Ano: 1997 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161997000300018 |
| |
|
|
|
