نتایج جستجو برای: to formulate sustainable agricultural systems

تعداد نتایج: 10927376  

Journal: :journal of agricultural science and technology 2012
a. asadi kh. kalantari sh. choobchian

agricultural sustainability refers to the ability of a farm to produce food indefinitely, without causing irreversible damage to ecosystem health. the main objective of this study was to formulate a structural model to analyze the effects of ecological, social, and economic factors on sustainable agricultural development in qazvin province of iran. to achieve this aim, a structural model with 4...

Journal: :New biotechnology 2010
Drew L Kershen

Agricultural trade between nations is a significant proportion of total international trade. Agricultural trade in transgenic crops faces extra complications due to the existence of domestic and international regimes that focus specifically on agricultural biotechnology. These specialized regimes create legal and commercial challenges for trade in transgenic crops that have significant implicat...

Journal: :Journal of animal science 1996
M Vavra

The question of sustainability of agricultural production and the use of natural resources has become a popular topic. Most scientists agree that current systems are generally non-sustainable. Current rates of resource extraction will lead us to a depleted earth in the future. Sustainability is defined in many ways. For this paper sustainability should be considered the overlap of what is wante...

Journal: :international journal of agricultural management and development 2014
abdulazeez muhammad-lawal omotesho kemi funmi adekola olabisi fatimat adekunle dayo

the study carried out an assessment of agricultural land management practices in food crops production among small scale farmers in kwara sate, nigeria. specifically, the study determined the socio economic characteristics of crop farmers in kwara state; ascertained the cropping patterns common among them; highlighted the soil conservation methods adopted by the farmers; examined the relationsh...

Abdulazeez Muhammad-Lawal Adekola Olabisi Fatimat Adekunle Dayo Omotesho Kemi Funmi

The study carried out an assessment of agricultural land management practices in food crops production among small scale farmers in Kwara Sate, Nigeria. Specifically, the study determined the socio economic characteristics of crop farmers in Kwara State; ascertained the cropping patterns common among them; highlighted the soil conservation methods adopted by the farmers; examined the relationsh...

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...

2014
Jules Pretty Zareen Pervez Bharucha

†Background Agricultural systems are amended ecosystems with a variety of properties. Modern agroecosystems have tended towards high through-flow systems, with energy supplied by fossil fuels directed out of the system (either deliberately for harvests or accidentally through side effects). In the coming decades, resource constraints over water, soil, biodiversity and land will affect agricultu...

پایان نامه :0 1375

the following null hypothesis was proposed: there is no significant difference between the efl students listening comprehension development receiving pictorial cues and those receiving no cuse. to test the null hypothesis, 52 male and femal freshmen students of medicine studing at iran university of medical scinces were randomly selected from a total population of 72 students. to ensure that th...

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