Pesticide Tax, Cropping Patterns, and Water Quality in South Central Texas
نویسندگان
چکیده
منابع مشابه
kurdish diaspora in central asia and caoucasus
در طول دو قرن گذشته و ظهور روسیه بعنوان قدرتی بزرگ در عرصه جهانی و شروع رقابت با سایر قدرت های بین المللی و منطقهای خصوصا با ایران و عثمانی این ئکشور تلاش کرده است تاد از جمعیت کردها در این کشورها در راستای منافع خود بهره برداری کند در قرون 18 و 19 بارها بخشی از کردها برعلیه امپراطوری عثمانی توسط این کشور مورد استفاده قرار گرفت خصوصا در جنگ های سال 1790تا 1798. این ججنگ ها م.جب شد که بخشی از کر...
15 صفحه اولOptimal cropping patterns under water deficits
A mathematical programming model is proposed for optimal cropping patterns under water de®cits in dry regions. Crops may be deliberately under-irrigated in order to increase the total irrigated area and possibly the pro®t. An operating policy will identify both the total area and the irrigation level allocated to a given selected crop taking into account the possible successors and predecessors...
متن کاملWater Quality in South Asia
Correspondence and reprint requests should be addressed to: Dr. Stephen Luby Head, Programme on Infectious Diseases and Vaccine Sciences ICDDR,B GPO Box 18, Dhaka 1000 Bangladesh Email: [email protected] Fax: 880-2-8823963 Water, an essential compound for human life, all too often carries pathogens that cause disease. The article by Tambe et al. illustrates a community where half the time the av...
متن کاملRelay cropping for improved air and water quality.
Using plants to extract excess nitrate from soil is important in protecting against eutrophication of standing water, hypoxic conditions in lakes and oceans, or elevated nitrate concentrations in domestic water supplies Global climate change issues have raised new concerns about nitrogen (N) management as it relates to crop production even though there may not be an immediate threat to water qu...
متن کاملCyanobacterial community patterns as water quality Bioindicators
The main goal of this study was to examine the use of cyanobacteria for evaluating the quality of running water. Accordingly epilithic cyanobacterial communities were collected in Dez River and Ojeyreb drain in south of Iran. Samples were collected in two seasons: autumn and spring. Effective physical and chemical factors on the structure of cyanobacterial communities and the dispersi...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Agricultural and Applied Economics
سال: 1994
ISSN: 1074-0708,2056-7405
DOI: 10.1017/s1074070800019325