نتایج جستجو برای: marginal production

تعداد نتایج: 641841  

Journal: :International Soil and Water Conservation Research 2013

2003
Donald N. Dewees

User fees for municipal services may generate revenue for municipalities and their utility commissions, but they are equally important as prices for those services. Pricing services at marginal cost can lead to efficient production and consumption of the service, and efficient allocation of the service when capacity limits are reached; and it can help to guide investment on an efficient basis. ...

Journal: :journal of dentistry, tehran university of medical sciences 0
f. gerami-panah s. boushehri

statement of problem: targis restorations provide good esthetic and clinical success; however, improving marginal accuracy requires further investigations. purpose: the aim of this was to study evaluate the effect of relining on the marginal accuracy of ceromer crowns. material and methods: one ivorine maxillary central incisor was prepared for targis crown. 10 acrylic models were duplicated fr...

فتاحی, مریم , مجیدزاده, سولماز, نوبخت, ملیحه, طباطبایی, پروانه , میرصمدی, منصور ,

    NO is a free radical that regulates a variety of developmental modulation processes. NO is synthesized by NOS and it acts as a neurotransmitter, neuromodulator or second messenger molecule in the central nervous system. Since NO production may be different before or after birth, the expression of neuronal nitric oxide synthase was examined and analysized during the development of rat optic ...

Search for an adapted forage species for feed production under existing marginal lands and harsh conditions is needed to overcome sever feed shortage in Egypt. Sesbania, Sesbania aegyptiaca (Sesbania sesban, L) has shown potential for forage production and being included in grazing systems, especially on marginal lands and salt–affected soils. An experiment was conducted in the summer of 2004 a...

Ahmad Sadeghzadeh Ashkan Nabavi-Pelesaraei Hassan Ghasemi Mobtaker, Mir Hossein Payman

The objectives of this research were to investigate influences of energy inputs and energy forms on output levels and evaluation of CO2 emissions for hazelnut production in Guilan province of Iran. Moreover, the sensitivity analysis was done by marginal physical productivity (MPP) method for energy inputs and energy using linear regression. Initial data were collected from 120 orchar...

2003
Lyubov A. Kurkalova Helen H. Jensen

A representative sample of 49 state and collective farms in Ukraine provides data in physical units on livestock and crop production and input use for 1989-92. The changes in production efficiency for beef, pork, dairy, winter wheat, grain, and potato production, investigated using stochastic frontier methods, show declining technical efficiency in livestock production and especially low margin...

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