نتایج جستجو برای: 30 cm rototiller parameters such as soil bulk density

تعداد نتایج: 6809907  

2010
P. Défossez G. Richard Y-J. Cui A-M. Tang V. Chaplain

Identifying the vulnerability of soils to compaction damage becomes an increasingly important issue in the planning and execution of farming operations. Soil compaction models are efficient tools for predicting soil compaction due to agricultural field traffic. Most of these models require the knowledge of the stress/strain relationship, as well as the mechanical parameters and their variation ...

Journal: :تحقیقات مهندسی کشاورزی 0
فریبرز عباسی دانشیار مؤسسه تحقیقات فنی و مهندسی کشاورزی

soil hydraulic properties are key soil physical characteristics that are required to conduct soil and water related studies such as irrigation and drainage. in this study, three indirect methods: inverse modeling, pedo-transfer function, and the semi-physical method of arya et al., were compared in a sandy loam soil to estimate soil moisture retention and unsaturated hydraulic conductivity curv...

Journal: :مرتع و آبخیزداری 0
عطاالله کاویان استادیار دانشکده منابع طبیعی، دانشگاه علومکشاورزی و منابع طبیعی ساری، ایران علی آزموده دانش آموخته کارشناسی ارشد آبخیزداری، دانشکده منابع طبیعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ایران کریم سلیمانی دانشیار دانشکده منابع طبیعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ایران قربان وهاب زاده استادیار دانشکده منابع طبیعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ایران

globally, soil erosion is one of the most important environmental problems which is threaten soil and water resources. soil properties are main parameters to affect runoff and soil erosion processes. so, this study was conducted to investigate the effects of some soil properties on runoff and soil erosion in the forest lands located in vicinity of sari city. rainfall simulator was set in 15 ran...

2014
M. S. Kahlon

Tillage practices significantly influences soil physical characteristics and crop productivity. The infiltration characteristics, bulk density, porosity, penetration resistance, grain yield of rice and wheat were measured under no-till without residue (NT), roto-tillage (RT), and no-till with residue i.e. happy seeder (HS) in rice-wheat cropping system in sandy loam (SL) and loamy sand (LS) soi...

2000
K. Oleschko B. Figueroa

The fractal approach to the study of soil structure, its dynamics, and physical processes appears to be a useful tool in reaching a better understanding of system performance. Nevertheless, the precise concurrent analysis of soil physical properties and fractal parameters seems to be important in order to evaluate the applicability of fractal concepts to soil science. The objective of this stud...

Journal: :international journal of civil engineering 0
s.a.o. hosseini forestry dep. - mazandaran prov. sari-(9th km)farahabad road-sari agricultural and natural resources university m. nasiri forestry dep. - mazandaran prov. sari-(9th km)farahabad road-sari agricultural and natural resources university m. akbarimehr forestry dep. - mazandaran prov. sari-(9th km)farahabad road-sari agricultural and natural resources university

harvesting of timber using ground based machinery is still a common practice around the world. track and road building, and movement of machinery during harvesting operations cause soil disturbance. therefore the aim of this study was to investigate the change in soil properties after logging operation on skid trails (2 years and 7 years after logging) and compare disturbed soil properties with...

Journal: :International Journal of Plant and Soil Science 2023

The trial carried on topic “Response of organic manures and rice residues soil physical health parameters” for the two repeated years, start from winter seasons years 2021-22 at research farm, department science agricultural chemistry. Total 54 samples were taken site different depths i.e., 0-15 cm 15-30 cm. Among nine treatments, during field experimentation, conjunctive use NPK [FYM, vermicom...

Journal: :Agronomy 2022

Tillage systems affect many properties of soil, such as soil bulk density, porosity, pore distribution, and water capacity. However, the effect reduced tillage (RT) on faba bean cultivation requires wider analysis. We carried out our investigations at Vytautas Magnus University, Agriculture Academy (Lithuania), part a long-term field experiment. The aim was to determine intensity distribution c...

Land use change is an important issue in Iran, especially in the north of the country. In the present research, effect of changing land use from rangeland to cropland and garden on some physical and chemical characteristics of soil, was studied in Babolrood Watershed in southern part of Babol, Eastern Bandpey in Mazandaran province. For each land use, soil samples were collected from 2 depths a...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه ارومیه 1377

the methods which are used to analyze microstrip antennas, are divited into three categories: empirical methods, semi-empirical methods and full-wave analysis. empirical and semi-empirical methods are generally based on some fundamental simplifying assumptions about quality of surface current distribution and substrate thickness. thses simplificatioms cause low accuracy in field evaluation. ful...

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