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    Gu铆as de fertirriego para riego por surcos

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    A mathematical model was developed to simulate the application efficiency and uniformity of water-soluble fertilizers through furrow irrigation. The model simulates solute mass balance and transport for one-dimensional unsteady flow during the advance and post-advance phases of a furrow irrigation event. The model was programmed to determine the best timing and duration of fertilizer injection using two performance indices: solute application efficiency and solute application uniformity. The results from the model were compared with two sets of field data and were found to be in close agreement in terms of advance trajectories and surface water solute concentrations. Nearly 50,000 simulations were performed with the model and the results were analyzed in terms of best injection start and end times for fertilizer application efficiency and uniformity. It was found that the best injection duration time was from 5 to 15% of the time of cutoff for a complete irrigation. Most of the cases showed that the injection should take place in a relatively short time span, and at a relatively high injection rate.Se desarroll贸 un modelo matem谩tico para simular la eficiencia de aplicaci贸n y uniformidad de fertilizantes solubles a trav茅s del riego por surcos. El modelo simula el balance de masa y transporte de solutos en flujo transitorio de una dimensi贸n durante las fases de avance y humedecimiento del riego por surcos, y fue dise帽ado para determinar la mejor programaci贸n de la inyecci贸n de fertilizantes a trav茅s de dos 铆ndices: eficiencia de aplicaci贸n y uniformidad de soluto. Los resultados del modelo fueron comparados con dos conjuntos de datos de campo y coincidieron estrechamente en t茅rminos de trayectoria de avance de agua y concentraci贸n superficial del soluto. Con el modelo se realizaron casi 50.000 simulaciones. Se determin贸 que la mejor duraci贸n de la inyecci贸n fue del 5 a 15% del tiempo de corte de agua para un riego completo. En la mayor铆a de los casos se manifest贸 que la inyecci贸n debe ser realizada en un per铆odo relativamente corto y a una tasa relativamente alta

    Fertigation guidelines for furrow irrigation

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    A mathematical model was developed to simulate the application efficiency and uniformity of water-soluble fertilizers through furrow irrigation. The model simulates solute mass balance and transport for one-dimensional unsteady flow during the advance and post-advance phases of a furrow irrigation event. The model was programmed to determine the best timing and duration of fertilizer injection using two performance indices: solute application efficiency and solute application uniformity. The results from the model were compared with two sets of field data and were found to be in close agreement in terms of advance trajectories and surface water solute concentrations. Nearly 50,000 simulations were performed with the model and the results were analyzed in terms of best injection start and end times for fertilizer application efficiency and uniformity. It was found that the best injection duration time was from 5 to 15% of the time of cutoff for a complete irrigation. Most of the cases showed that the injection should take place in a relatively short time span, and at a relatively high injection rateSe desarroll贸 un modelo matem谩tico para simular la eficiencia de aplicaci贸n y uniformidad de fertilizantes solubles a trav茅s del riego por surcos. El modelo simula el balance de masa y transporte de solutos en flujo transitorio de una dimensi贸n durante las fases de avance y humedecimiento del riego por surcos, y fue dise帽ado para determinar la mejor programaci贸n de la inyecci贸n de fertilizantes a trav茅s de dos 铆ndices: eficiencia de aplicaci贸n y uniformidad de soluto. Los resultados del modelo fueron comparados con dos conjuntos de datos de campo y coincidieron estrechamente en t茅rminos de trayectoria de avance de agua y concentraci贸n superficial del soluto. Con el modelo se realizaron casi 50.000 simulaciones. Se determin贸 que la mejor duraci贸n de la inyecci贸n fue del 5 a 15% del tiempo de corte de agua para un riego completo. En la mayor铆a de los casos se manifest贸 que la inyecci贸n debe ser realizada en un per铆odo relativamente corto y a una tasa relativamente alt
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