نتایج جستجو برای: to formulate sustainable agricultural systems

تعداد نتایج: 10927376  

Journal: :تحقیقات اقتصاد و توسعه کشاورزی ایران 0
هادی ویسی دانشگاه شهید بهشتی جعفر کامبوزیا دانشگاه شهید بهشتی مجتبی زارع دانشگاه شهید بهشتی مسعود حقیقی دانشگاه شهید بهشتی

the evidence from experiences and projects have revealed that favourable policy environment, resource conserving technologies, enabling external institutions, and local institutions and groups are the components and the preconditions needed for the successful implementation of sustainable agriculture. in this context, the mission of government is providing an appropriate institutional environme...

2016
Leonardo F. Fraceto Renato Grillo Gerson A. de Medeiros Viviana Scognamiglio Giuseppina Rea Cecilia Bartolucci

Recent scientific data indicate that nanotechnology has the potential to positively impact the agrifood sector, minimizing adverse problems of agricultural practices on environment and human health, improving food security and productivity (as required by the predicted rise in global population), while promoting social and economic equity. In this context, we select and report on recent trends ...

2017
Charlotte L. R. Payne Joost Van Itterbeeck

Many of the most nutritionally and economically important edible insects are those that are harvested from existing agricultural systems. Current strategies of agricultural intensification focus predominantly on increasing crop yields, with no or little consideration of the repercussions this may have for the additional harvest and ecology of accompanying food insects. Yet such insects provide ...

2012
Alastair Iles Robin Marsh

If diversified farming systems (DFS) are to thrive again in the United States, policies and preferences must evolve to reward the environmental and social benefits of sustainable farming and landscape management. Compared with conventional agricultural policies, policies aiding ecological diversification are underdeveloped and fragmented. We consider several examples of obstacles to the adoptio...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 1999
V W Ruttan

The transition to sustainable growth in agricultural production during the 21st century will take place within the context of a transition to a stable population and a possible transition to a stable level of material consumption. If the world fails to successfully navigate a transition to sustainable growth in agricultural production, the failure will be due more to a failure in the area of in...

2008

Introduction Achieving more sustainable consumption and production in the agricultural sector requires a coherent response to the intimate linkages between agricultural production, agro-ecosystems and the people who rely on them, and also the concerns and preferences of a growing number of consumers. Less input intensive and more resource efficient agriculture offers a means to strengthen the c...

Journal: :تحقیقات اقتصاد و توسعه کشاورزی ایران 0
آصف کریمی دانشجوی دکتری، دانشکده اقتصاد و توسعه کشاورزی دانشگاه تهران ایرج ملک محمدی استاد دانشکده اقتصاد و توسعه کشاورزی دانشگاه تهران احمد رضوانفر استاد دانشکده اقتصاد و توسعه کشاورزی دانشگاه تهران محمود احمد پور داریانی استادیار دانشکده کارآفرینی دانشگاه تهران

the main purpose of this study was to investigate the level of agricultural extension entrepreneurship in the process of sustainable agricultural development. the statistical population of the study was composed of agricultural extension experts (n=2882). the method of sampling was a systematic random sampling one. questionnaire was the means employed for data collection. questionnaire validati...

1999
V. O. Biederbeck N. Z. Lupwayi W. A. Rice K. G. Hanson R. P. Zentner

The inclusion of grain and green manure (GM) or forage legumes in cereal production systems on the Prairies does improve the fertility and quality of soils (Wright 1990; Campbell et al. 1992; Green and Biederbeck 1995; Biederbeck et al. 1998). Legume-based cropping systems can also reduce nitrogen losses and greatly increase the proportion of crop residuecarbon that is sequestered in stable soi...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان 1390

abstract the influence of cation?? and anion?? interactions on the strength and nature of n…h hydrogen bond has been investigated by quantum chemical calculations in s-triazine…3hf complex. ab initio calculations were performed at mp2/6-311++g(d,p) level of theory. the natural bond orbital (nbo) analysis and the bader’s quantum theory of atoms in molecules (aim) were also used to elucidate t...

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