نتایج جستجو برای: rotary cultivators

تعداد نتایج: 10075  

Journal: :کشاورزی (منتشر نمی شود) 0
محمود صفری مربی پژوهش، موسسه تحقیقات فنی و مهندسی کشاورزی، کرج حسین نجفی استادیار پژوهش، مؤسسه تحقیقات گیاهپزشکی کشور، تهران

in order to comparison of weeds mechanical control for sugar beet, a rotary cultivator was designed and constructed in first year, and compared with other mechanical control in second year. five treatments, included: rotary hoe cultivator, furrower cultivator, rotary cultivator, no weeding and manual weeding were compared. experiment design was random complete blocks design (rcbd) with three re...

Journal: :E3S web of conferences 2023

The article analyzes the designs of various types cultivators, which are used to remove unwanted herbaceous and tree-shrub vegetation. Cultivators with disk, rotary, milling tine working bodies considered. It is shown that quite a lot material resources spent on carrying out agro technical care for valuable forest crops. noted mechanical method soil in aisles rows crops has become widespread, d...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه ارومیه - دانشکده کشاورزی 1389

چکیده ندارد.

2010
Luuk Fleskens Fedde Jorritsma

In Suriname, the Maroons have practiced shifting cultivation for generations, but now the increasing influence of modern society is causing a trend of decreasing fallow periods with potentially adverse effects for the vulnerable tropical soils. Adoption of appropriate soil fertility management (SFM) practices is currently slow. Combining methods from cultural ecology and environmental psycholog...

2003
Amitrajeet A. Batabyal Dug Man Lee

In this paper we first construct a theoretical model of land use by swidden cultivators when these cultivators can choose whether to grow a cash crop or a food/subsistence crop. Second, we study the land quality accumulation decision faced by shifting cultivators and, in the process, we show how to compute the optimal length of time during which cleared land is to be left fallow. Finally, we in...

2015
Lucy van Dorp David Balding Simon Myers Luca Pagani Chris Tyler-Smith Endashaw Bekele Ayele Tarekegn Mark G. Thomas Neil Bradman Garrett Hellenthal Anna Di Rienzo

The Ari peoples of Ethiopia are comprised of different occupational groups that can be distinguished genetically, with Ari Cultivators and the socially marginalised Ari Blacksmiths recently shown to have a similar level of genetic differentiation between them (FST ≈ 0.023 - 0.04) as that observed among multiple ethnic groups sampled throughout Ethiopia. Anthropologists have proposed two competi...

2013
Ahmed Musfiq Mobarak Mark Rosenzweig Ahmed Mushfiq Mobarak

We estimate the general-equilibrium labor market effects of a large-scale randomized intervention in which we designed and marketed a rainfall index insurance product across three states in India. Marketing agricultural insurance to both cultivators and to agricultural wage laborers allows us to test a general-equilibrium model of wage determination in settings where households supplying labor ...

2016
J. G. Pughe

J. G. Pughe, Esq., Officiating Sub-Deputy Opium Agent of Ally gunge, Sew an, To E. N. Farquharson, Esq., Opium Agent of Behctr. Dated ls< February, 18G1. Sir,?Before making oyer charge of this office, I would, in continuation of my letter to your address, No. 37 of 28th June last, beg to place on record two statements shewing the rates of mortality, causes of death, and ages of the deceased amo...

Journal: :JOURNAL OF EXTENSION EDUCATION 2018

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