Suchergebnisse

International audience ; In Tunisia, irrigated durum wheat is grown on an average annual area of 48 700 ha, which represents two-thirds of the irrigated cereal area. It produces an average of 180 000 t, or 20% of national durum wheat production. However, the yields achieved are still below expectations with low productivity, particularly of water resources. In this context, this work aims to draw up an operational diagnosis of the irrigated cereal farms and to highlight the main levers for improving the performance of the durum wheat crop. To this end, field surveys were conducted with a sample of 698 grain farmers. The data collected made it possible to develop a typology of farming systems and to analyze the performance of the durum wheat cultivation activity. Three types of farming systems were identified: A monocultural system based on durum wheat cropping, a diversified cereal-oriented system and a diversified horticulture-oriented system. Performance analysis revealed a clear disparity between two distinct performance levels for each farming system. ; En Tunisie, la culture de blé dur en irrigué est pratiquée sur une superficie moyenne annuelle de 48 700 ha, soit environ les deux tiers des superficies céréalières conduites en irrigué. Elle produit en moyenne 180 000 t, soit 20 % de la production nationale de blé dur. Cependant, les rendements réalisés restent toujours en dessous des attentes avec une faible productivité, particulièrement celle de la ressource en eau. Dans ce contexte, l'objectif de ce travail est d'élaborer un diagnostic opérationnel de fonctionnement des exploitations céréalières irriguées et de mettre en exergue les principaux leviers d'amélioration des performances de la culture du blé dur. Pour ce faire, des enquêtes de terrain ont été menées auprès d'un échantillon de 698 céréaliculteurs. Les données recueillies ont permis d'élaborer une typologie de fonctionnement et d'analyser les performances de la culture du blé dur. Trois systèmes de production types ont été identifiés : un ...

International audience ; In Tunisia, irrigated durum wheat is grown on an average annual area of 48 700 ha, which represents two-thirds of the irrigated cereal area. It produces an average of 180 000 t, or 20% of national durum wheat production. However, the yields achieved are still below expectations with low productivity, particularly of water resources. In this context, this work aims to draw up an operational diagnosis of the irrigated cereal farms and to highlight the main levers for improving the performance of the durum wheat crop. To this end, field surveys were conducted with a sample of 698 grain farmers. The data collected made it possible to develop a typology of farming systems and to analyze the performance of the durum wheat cultivation activity. Three types of farming systems were identified: A monocultural system based on durum wheat cropping, a diversified cereal-oriented system and a diversified horticulture-oriented system. Performance analysis revealed a clear disparity between two distinct performance levels for each farming system. ; En Tunisie, la culture de blé dur en irrigué est pratiquée sur une superficie moyenne annuelle de 48 700 ha, soit environ les deux tiers des superficies céréalières conduites en irrigué. Elle produit en moyenne 180 000 t, soit 20 % de la production nationale de blé dur. Cependant, les rendements réalisés restent toujours en dessous des attentes avec une faible productivité, particulièrement celle de la ressource en eau. Dans ce contexte, l'objectif de ce travail est d'élaborer un diagnostic opérationnel de fonctionnement des exploitations céréalières irriguées et de mettre en exergue les principaux leviers d'amélioration des performances de la culture du blé dur. Pour ce faire, des enquêtes de terrain ont été menées auprès d'un échantillon de 698 céréaliculteurs. Les données recueillies ont permis d'élaborer une typologie de fonctionnement et d'analyser les performances de la culture du blé dur. Trois systèmes de production types ont été identifiés : un ...

International audience ; In Tunisia, irrigated durum wheat is grown on an average annual area of 48 700 ha, which represents two-thirds of the irrigated cereal area. It produces an average of 180 000 t, or 20% of national durum wheat production. However, the yields achieved are still below expectations with low productivity, particularly of water resources. In this context, this work aims to draw up an operational diagnosis of the irrigated cereal farms and to highlight the main levers for improving the performance of the durum wheat crop. To this end, field surveys were conducted with a sample of 698 grain farmers. The data collected made it possible to develop a typology of farming systems and to analyze the performance of the durum wheat cultivation activity. Three types of farming systems were identified: A monocultural system based on durum wheat cropping, a diversified cereal-oriented system and a diversified horticulture-oriented system. Performance analysis revealed a clear disparity between two distinct performance levels for each farming system. ; En Tunisie, la culture de blé dur en irrigué est pratiquée sur une superficie moyenne annuelle de 48 700 ha, soit environ les deux tiers des superficies céréalières conduites en irrigué. Elle produit en moyenne 180 000 t, soit 20 % de la production nationale de blé dur. Cependant, les rendements réalisés restent toujours en dessous des attentes avec une faible productivité, particulièrement celle de la ressource en eau. Dans ce contexte, l'objectif de ce travail est d'élaborer un diagnostic opérationnel de fonctionnement des exploitations céréalières irriguées et de mettre en exergue les principaux leviers d'amélioration des performances de la culture du blé dur. Pour ce faire, des enquêtes de terrain ont été menées auprès d'un échantillon de 698 céréaliculteurs. Les données recueillies ont permis d'élaborer une typologie de fonctionnement et d'analyser les performances de la culture du blé dur. Trois systèmes de production types ont été identifiés : un ...

International audience ; Irrigated durum wheat is a staple food crop that occupies important areas in Tunisia. However, its performance remains weak, with an average national yield of no more than 7 tons ha−1 and low profitability. Overall, on-farm wheat production will need to increase considerably to meet future demand and ensure minimum profitability for farmers. To this end, this study aims to identify the main levers for improving durum wheat crop performance. For this purpose, we have developed a regional bio-economic model by linking a biophysical model (CROPSYST) with an economic optimization model (MORBIT). CROPSYST was used to establish a database with a view to determining the relationships between farming practices, durum wheat yields, and water productivity within a context of high climate variability. The database was then integrated into a MORBIT model that analyzed the effects of farming practices on durum wheat performance and regional profits. Three scenarios related to irrigation control and the increase in durum wheat prices were developed. The results showed that reconciling irrigation practices with economic policies is the best alternative to improve durum wheat performance and increase profits at a regional level.

International audience ; Irrigated durum wheat is a staple food crop that occupies important areas in Tunisia. However, its performance remains weak, with an average national yield of no more than 7 tons ha−1 and low profitability. Overall, on-farm wheat production will need to increase considerably to meet future demand and ensure minimum profitability for farmers. To this end, this study aims to identify the main levers for improving durum wheat crop performance. For this purpose, we have developed a regional bio-economic model by linking a biophysical model (CROPSYST) with an economic optimization model (MORBIT). CROPSYST was used to establish a database with a view to determining the relationships between farming practices, durum wheat yields, and water productivity within a context of high climate variability. The database was then integrated into a MORBIT model that analyzed the effects of farming practices on durum wheat performance and regional profits. Three scenarios related to irrigation control and the increase in durum wheat prices were developed. The results showed that reconciling irrigation practices with economic policies is the best alternative to improve durum wheat performance and increase profits at a regional level.

International audience ; Irrigated durum wheat is a staple food crop that occupies important areas in Tunisia. However, its performance remains weak, with an average national yield of no more than 7 tons ha−1 and low profitability. Overall, on-farm wheat production will need to increase considerably to meet future demand and ensure minimum profitability for farmers. To this end, this study aims to identify the main levers for improving durum wheat crop performance. For this purpose, we have developed a regional bio-economic model by linking a biophysical model (CROPSYST) with an economic optimization model (MORBIT). CROPSYST was used to establish a database with a view to determining the relationships between farming practices, durum wheat yields, and water productivity within a context of high climate variability. The database was then integrated into a MORBIT model that analyzed the effects of farming practices on durum wheat performance and regional profits. Three scenarios related to irrigation control and the increase in durum wheat prices were developed. The results showed that reconciling irrigation practices with economic policies is the best alternative to improve durum wheat performance and increase profits at a regional level.

International audience ; Irrigated durum wheat is a staple food crop that occupies important areas in Tunisia. However, its performance remains weak, with an average national yield of no more than 7 tons ha−1 and low profitability. Overall, on-farm wheat production will need to increase considerably to meet future demand and ensure minimum profitability for farmers. To this end, this study aims to identify the main levers for improving durum wheat crop performance. For this purpose, we have developed a regional bio-economic model by linking a biophysical model (CROPSYST) with an economic optimization model (MORBIT). CROPSYST was used to establish a database with a view to determining the relationships between farming practices, durum wheat yields, and water productivity within a context of high climate variability. The database was then integrated into a MORBIT model that analyzed the effects of farming practices on durum wheat performance and regional profits. Three scenarios related to irrigation control and the increase in durum wheat prices were developed. The results showed that reconciling irrigation practices with economic policies is the best alternative to improve durum wheat performance and increase profits at a regional level.

This simulation study explored the agricultural household effects of changes in the price of inorganic nitrogen fertilizer for farmers in central Malawi. We selected the Dedza district to conduct this study, which is a district reliant on maize production for household livelihoods. This study used data from a household survey to develop and calibrate an agricultural household model for a representative household. The survey focused on socio-economic and agronomic factors. This included plot-level agronomic details for crop inputs and yields. Using our dynamic model, we found a negative association between fertilizer prices and fertilizer use, maize area, and income. Removing fertilizer prices led to an increased use of nitrogen fertilizer at the household scale from 16.8 kg to 49.6 kg and this helped increase household income by 52%. We calculated an average own-price elasticity of fertilizer demand of − 0.92. Although higher fertilizer prices increased legume acreage, which had potential environmental benefits, household income fell. Our benefit-cost ratio calculations suggest that government actions that deliver changes in fertilizer prices are relatively cost effective. Our study highlights the reliance of households on maize production and consumption for their livelihood, and the effects that changes in fertilizer prices can have upon them.