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The Economics of Using Chemical Fertilizers in The Production of Nile Tomatoes
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Abstract: ــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــ
• The 36th Annual Conference of Statistics, Computer Science and Operations Research, Seminar on Development and Improvement of Agricultural Statistics, Agricultural Economics Research Institute (AERI), Giza, Egypt, April 2001.
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Chemical fertilizer inputs are considered one of the main axes of vertical agricultural development, where a large part of the difference in the production level is due to the extent to which the new technological methods are used in fertilization, and since agricultural production decisions are characterized by an individual character, allowing the individual producer to make his own production decisions, the experience is weak or The deficient information that most farmers have about the combinations that achieve economic efficiency in the use of chemical fertilizers may lead to wasteful or lessening of them, in addition to the fact that relying on recommendations related to chemical fertilization and its rates vary according to different types of land and crops, and there is no way to find out the economic fertility rates except by identifying The needs of each planting of different crops according to the type of soil and its degree of fertility so that the recommendations are commensurate with the region, the nature of the soil and the type of crop, and this research aimed to study the effect of using quantities of nitrogen, phosphorous and potassium fertilizers in the form of effective units on the yield of indigo tomatoes, and to know the optimum fertilizer levels that maximize Production, and studying the effect of price changes for each of the Fertilizers and tomatoes at optimum fertilizer levels and on yield from tomatoes.
In order to achieve this, the statistical estimation of production functions was required to choose the model closest to reality in representing the fertile production relationship of tomatoes using preliminary experimental data conducted on the indigo tomato crop in Giza Governorate. The models of the equations that were evaluated included three images: the simultaneous quadratic function, the simultaneous root function, and the function. Logarithmic, at three different levels of potassium (40, 50, 60 kg), it was found that the second-degree simultaneous model with a common limit of influence at the level of potassium 40 kg is relatively better than the rest of the estimated models, as it shows the consistency of its results with the productive logic in terms of signals Regression coefficients. It also achieved the best results in terms of the coefficient of determination and the significance of the regression coefficients and the absence of a self-correlation between errors, as well as the absence of a linear correlation between the model variables except for the quadratic boundaries, which showed a linear relationship between them and the linear terms derived from them.
The estimated function showed that the role of nitrogen and phosphorus in tomato production is determined by the level of the other element, and that the substitution relationship between them varies according to both the levels of added fertilizers and the level of production from tomatoes, and that the optimum levels of nitrogen and phosphorous fertilizer according to the current price level amounted to about 108.4 kg pure nitrogen 48.2 kg of pure phosphorus to produce about 541.2 kg of tomatoes, and the results of the sensitivity analysis of the price changes of nitrogenous and phosphorous fertilizers and tomatoes showed that the used amount of nitrogen fertilizer is more sensitive to the change in its price, while the used amount of phosphorus fertilizer is less sensitive to the change in its price. With regard to the effect of the change in the price of tomatoes, as an increase in their price leads to an increase in the quantities used of nitrogen fertilizer and an increase in the yield of tomatoes, while the quantities used are not affected by the phosphorous fertilizer.
Accordingly, the study recommended the importance of directing the price policy towards reducing the price of nitrogenous fertilizers and working to increase the demand side for tomatoes by encouraging their exports, so that their prices rise, as this has a clear impact on increasing their production.
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| Publication year |
2001
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| Pages |
1 - 18
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| Availability location |
مكتبة معهد بحوث الاقتصاد الزراعي-7 ش نادى الصيد - مبنى الهيئات والشركات - الدقي- الجيزة (الدور الرابع)
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| Availability number |
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| Organization Name |
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| City |
الجيزة
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| serial title |
المؤتمر الدولي السادس والثلاثون للإحصاء وعلوم الحاسب وتطبيقاته - ندوة تطوير وتحسين الإحصاءات الزراعية
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| Author(s) from ARC |
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| External authors (outside ARC) |
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| Agris Categories |
Agricultural research
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| Publication Type |
Conference/Workshop
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