搜索结果: 46-60 共查到“农学 Iran”相关记录88条 . 查询时间(0.188 秒)
Rutting and soil displacement caused by 450C Timber Jack wheeled skidder (Asalem forest northern Iran)
soil displacement rutting skid trail
2015/3/16
The use of skidding machinery in logging operations causes destructive effects especially on soil but has many advantages such as extracting long and heavy logs, optimum use of useful logging time and...
Evaluating the shelterwood harvesting system after 25 years in a beech Fagus orientalis Lipsky) forest in Iran
regeneration unit silviculture Hyrcanian forest
2015/3/16
Beech (Fagus orientalis Lipsky) is the most industrial commercial tree species among more than 80 broadleaved trees and shrubs in Hyrcanian forests. In this study some of the silvicultural properties ...
The effect of shelterwood silvicultural method on the plant species diversity in a beech (Fagus orientalis Lipsky) forest in the north of Iran
beech forest shelterwood method plant diversity
2015/3/16
To clarify the effect of shelterwood silvicultural method on the diversity of plant species in a beech (Fagus orientalis) forest in the north of Iran, we compared the plant species diversity in three ...
Field performance evaluation of micro irrigation systems in Iran
emitter clogging emission uniformity statistical uniformity
2015/3/10
The efforts to introduce the micro irrigation system in Iran go back as far as the year 1990. The area under micro irrigation system in Iran covers about 400 000 ha and it is estimated to double (800 ...
Characterising the Genetic Diversity of Pseudomonas syringae pv. syringae Isolated from Rice and Wheat in Iran
bacterial pathogen population genetic structure host preference RAPD
2015/3/9
Sheath rot of rice and leaf blight of wheat caused by Pseudomonas syringae pv. syringae are the important bacterial pathogens of rice and wheat in Iran. The randomly amplified polymorphic DNA (RAPD) m...
Evaluation of the relationships between runoff-rainfall-sediment related nutrient loss (A case study: Kojour Watershed, Iran)
clockwise hysteretic loop organic matter phosphorus loss regression models suspended sediment
2015/3/9
Suspended sediment (SS) resulted from distributed soil erosions facilitates soil organic matter and phosphorus (P) transportation and influences soil depletion and water quality. Organic matter (OM) i...
Soil compaction caused by 450C Timber Jack wheeled skidder (Shefarood forest, northern Iran)
soil compaction forest soil wheeled skidder
2015/3/6
In forest harvesting operations usually after using skidding machinery (skidders), traces of soil damage in the form of soil compaction and wheel and logs ruts can be seen in the forest soil. Soil bul...
Effects of livestock exclusion on forest trees regeneration (Case study: Ramsar’s district 1- Iran)
livestock removal forest regeneration Ramsar’s district diameter classes forest management plan
2015/5/6
In order to study the effect of livestock removal on forest regeneration in Ramsar district 1- Mazandaran Province, the compartment 23 with area of 96 ha was selected. The required data were collected...
Detection and molecular characterization of Polymyxa betae, transmitting agent of sugar beet rhizomania disease, in Iran
Beta vulgaris cystosori ITS GST BNYVV virus-bearing virus-free
2014/10/28
The plasmodiophorid Polymyxa betae is considered as the only natural transmitting agent of Beet necrotic yellow vein virus (BNYVV), the most devastating agent of sugar beet fields throughout the world...
Investigating poverty in rural Iran: The multidimensional poverty approach
Multidimensional Poverty Approach Rural Poverty Data Mining Iran
2013/2/28
In this study, rural poverty in Iran is investigated applying a multidimensional approach, association rules mining technique, and Levine, F and Tukey tests to household data of 2008. The results indi...
Evaluation of pathogencity and race classification of Xanthomonas oryzae pv. oryzae in guilan province-Iran
Bacterial Blight Near-Isogenic Lines Pyramiding Lines
2013/2/28
To evaluation of pathogenicity and race classification of Xanthomonas oryzae pv. oryzae agent bacterial leaf blight of rice, 153 isolates of X. oryzae pv. oryzae were collected from different rice-gro...
Prevalence, Risk Factors and Consequent Effect of Dystocia in Holstein Dairy Cows in Iran
Birth Weight Dystocia Holstein
2016/5/9
The objective of this research was to determine the prevalence, risk factors and consequent effect of dystocia on lactation performance in Holstein dairy cows in Iran. The data set consisted of 55,577...
Wool characteristics of crossbred Baghdadi wild ram and Iran native sheep
Wool Characteristics Farahani Sheep Crossbreeding
2013/2/28
Twenty mid side wool samples of crossbred sheep were collected and their characteristics were determined. Data analyzed by SAS software and Duncan’s multiple range tests was used for comparison of mea...
Iran’s registration of rural residential texture
Documentation ownership deeds rural texture Iran
2011/2/22
There are lots of plans and policies through development and especially rural development. In Iran, “Registration of Rural Residential Texture” is one of those projects that are used to gain security ...
The effects of market factors and government policies on the maize marketing in Iran
Marketing margin market structure agriculture policies maize Iran
2011/2/22
Maize plays a unique role in the agricultural economic of world. It is a key stable crop which is used in a wide range of food industries and as a customary livestock feed in Iran. Also, it is one of ...