نتایج جستجو برای: agricultural land use

تعداد نتایج: 1889356  

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2015
Rebecca Chaplin-Kramer Richard P Sharp Lisa Mandle Sarah Sim Justin Johnson Isabela Butnar Llorenç Milà I Canals Bradley A Eichelberger Ivan Ramler Carina Mueller Nikolaus McLachlan Anahita Yousefi Henry King Peter M Kareiva

The agricultural expansion and intensification required to meet growing food and agri-based product demand present important challenges to future levels and management of biodiversity and ecosystem services. Influential actors such as corporations, governments, and multilateral organizations have made commitments to meeting future agricultural demand sustainably and preserving critical ecosyste...

Increasing urbanization in the urbanized world has posed major challenges to the sustainability of metropolitan areas, especially in developing countries in various aspects of sustainable development, and has provided them with the prospect of unsustainable development. Excessive land use and its consequent land use changes and land cover are one of the environmental problems caused by the high...

Journal: :اکو هیدرولوژی 0
فاطمه رجایی دانشجوی دکتری، دانشکدۀ منابع طبیعی دانشگاه تربیت مدرس، نور عباس اسماعیلی ساری استاد، دانشکدۀ منابع طبیعی دانشگاه تربیت مدرس، نور عبدالرسول سلمان ماهینی دانشیار، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گرگان مجید دلاور استادیار، دانشکدۀ کشاورزی، دانشگاه تربیت مدرس، تهران علیرضا مساح بوانی دانشیار، پردیس ابوریحان، دانشگاه تهران، تهران

non-point pollution are an important factor in determining water quality and eutrophication of fresh water. the principle causes of this issue is high concentrations of nutrients in the water especially nitrogen and phosphorus. change of land use particularly affected on water nitrate load. therefore, understanding the correlations between land use and nitrate pollutant is a priority in order t...

2017
Peter Baas Jennifer D. Knoepp Daniel Markewitz Jacqueline E. Mohan

The critical role streamside riparian zones play in mitigating the movement of nitrogen (N) and other elements from terrestrial to aquatic ecosystems could be threatened by residential development in the southern Appalachian Mountains. Many studies have investigated the influence of agriculture on N loading to streams but less is known about the impacts of residential development. Here we consi...

2000
R. P. Roetter A. G. Laborte H. Van Keulen

R apid population growth, coupled with economic expansion, is increasing the demands on land not only for agriculture but also for housing, infrastructure, recreation, and industry. Many of the agricultural regions in South and Southeast Asia characterized by intensive rice-or rice-wheat-based agroecosystems provide striking examples of conflicts in agricultural land-use objectives. The need fo...

2012
JOHN E. ANDERSON

This paper provides an overview of the theory and methods used to implement use-value property tax assessment for agricultural land in the United States. After a critical review of the methods used by various states in their application of use-value statutes for agricultural land, the paper examines several policy issues related to the estimation and application of use-value assessment methods....

2016
Fengqin Yan Shuwen Zhang Wenhui Kuang Guoming Du Jing Chen Xingtu Liu Lingxue Yu Chaobin Yang

Understanding the historical change of agricultural landscape patterns is the basis for promoting the sustainable development of cultivated land, as well as appropriate decision-making. In order to analyze spatio-temporal changes of cultivated land in Sanjiang Plain, from 1985–2015, Landsat Thematic Mapper (TM) and Operational Land Imager (OLI) were used to reconstruct satellite data of land us...

2012
Yaolong Zhao Ke Zhang Yingchun Fu Hong Zhang

Monitoring land-use/land-cover change (LULCC) and exploring its mechanisms are important processes in the environmental management of a lake watershed. The purpose of this study was to examine the spatiotemporal pattern of LULCC by using multi landscape metrics in the Lake Dianchi watershed, which is located in the Yunnan-Guizhou Plateau of Southwest China. Landsat images from the years 1974, 1...

2002
Y. Q. Wang

This paper summarises the general pattern of urban land-cover change in the Northeastern Illinois between 1972 and 1997 using Landsat acquired remotely sensed images. The region, centred by the city of Chicago, experienced dramatic land cover change in the past decades. Accompanying the redistribution of population and decentralisation of metropolitan functions are the tremendous growth and dev...

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