نتایج جستجو برای: in sustainable agriculture

تعداد نتایج: 17008038  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید چمران اهواز - دانشکده مهندسی علوم آب 1393

drought is transient phenomenon , slow , repetitive and integral part of the climate of each region. drought begins with a substantial reduction in precipitation over the long-term average rainfall and over time, reduced soil moisture and surface and ground water resources will continue to decrease. this phenomenon is the most important in bakhtegan basin because of its importance in strategic ...

2010
Justin S. Ellis Julia Gaskin

Introduction Much of the early development and diffusion of sustainable agriculture information has occurred outside of traditional avenues for agricultural information exchange. Studies have shown that farmers engaged in sustainable agriculture obtain most of their information on sustainable practices predominately from other farmers, followed by private non-profits, other educational organiza...

Journal: :تحقیقات اقتصاد و توسعه کشاورزی ایران 0
زهرا افشاری دانش آموخته کارشناسی ارشد رشته ترویج و آموزش کشاورزی عبدالعظیم آجیلی دانشیار بخش ترویج و آموزش کشاورزی، دانشگاه علوم کشاورزی رامین، اهواز کورش رضایی مقدم استادیار بخش ترویج و آموزش کشاورزی، دانشکده کشاورزی، دانشگاه شیراز مسعود بیژنی عضو هیات علمی دانشگاه آزاد اسلامی واحد بروجرد

farmers' attitudes play an important role in their towards sustainable agriculture behavior. factors affecting men and women cotton producers’ attitude towards sustainable agriculture were investigated in the course of this worke. the research was a survey one using stratified random sampling, conducted in esfahan province. the subjects were selected from 179 cotton producing families (357...

2012
Mikael Hildén Pekka Jokinen Jyrki Aakkula

The concept of sustainability has been a part of theory and practice in agriculture for a long time, but the diverse roots of the concept have led to a number of different definitions of sustainable agriculture. This paper provides an overview of the policy development of sustainable agriculture in Finland by examining internal and external discourses of sustainability and the evolution in diff...

2000
M.V.K. Sivakumar W. Baier

Current concerns with the sustainability of agroecosystems in different parts of the world have hightened the awareness for careful use of the natural resource base on which agriculture depends. For proper and efficient use of soils and plant/animal genetic material, knowledge of the role of climate is an essential precondition. Several elements of the chapters in Agenda 21, a global plan of ac...

Journal: :Pest management science 2004
Richard H Bromilow

Sustainable agriculture is essential for man's survival, especially given our rapidly increasing population. Expansion of agriculture into remaining areas of natural vegetation is undesirable, as this would reduce biodiversity on the planet. Maintaining or indeed improving crop yields on existing farmed land, whether on a smallholder scale or on larger farms, is thus necessary. One of the limit...

2005
N. V. Hue J. A. Silva

Sustainable agriculture, which is characterized by farming profitably while minimizing damage to the environment, is not easy to practice. “Conventional” agriculture in the USA is commonly considered to involve practices that have potential to damage the environment. These include tilling the soil excessively, overapplying readily soluble inorganic fertilizers (“chemical fertilizers”), and over...

1998
David L. Williams Kenneth L. Wise

The purpose of this study was to determine the perceptions of Iowa agricultural education teachers and students about sustainable agriculture. The teacher population for the study included all secondary school agricultural education teachers in Iowa (N=248). A stratified random sample of 60 teachers (schools) was selected, I O from each of the six FFA districts. Teachers in the sample were aske...

Journal: :Journal of animal science 2004
R K Heitschmidt L T Vermeire E E Grings

The objective of this paper is to examine the sustainability of rangeland agriculture (i.e., managed grazing) on a world-wide basis, with a focus on North America. Sustainability is addressed on three fronts: 1) ecological, 2) economic, and 3) social acceptance. Based on previous and on-going research, we suggest that employment of science-based rangeland grazing management strategies and tacti...

Journal: :اقتصاد و توسعه کشاورزی 0
محسن عادلی ساردوئی باب اله حیاتی شاپور ظریفیان سیدداود حسینی نسب

abstract in recent decades, more consumption of agricultural inputs led to growth in agricultural products in the world. however, problems occurred due to the lack of attention to environmental issues and risks of excessive consumption of chemicals on human health become a concern for people and policy makers. to solve the problem, sustainable agriculture has been considering by authorities. th...

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