نتایج جستجو برای: of planting

تعداد نتایج: 21164913  

2012
Jing Yao Xingyuan He Anzhi Wang Wei Chen Xiaoyu Li Bernard J. Lewis Xiaotao Lv

Balancing forest harvesting and restoration is critical for forest ecosystem management. In this study, we used LANDIS, a spatially explicit forest landscape model, to evaluate the effects of 21 alternative forest management initiatives which were drafted for forests in the upstream region of the Hun River in northeastern China. These management initiatives included a wide range of planting and...

Journal: :مهندسی بیوسیستم ایران 0
علیرضا مندنی دانشگاه شیراز سیدحسین کارپرورفرد دکترا، طراحی، ادوات خاک ورز، انتقال مواد

the main problems in mixed culture are using the agricultural machines for plant two or more crop simultaneously. in the present study to remove difficulties of using agriculture machinery in planting operation for corn and bean simultaneously, a planter was designed and developed to direct planting of two different types of seeds having different shapes and sizes with precise proportion and di...

2008
Xin Yang Han Sun Zongkun Tan Meihua Ding

This paper presents an automatic approach to planting areas extraction for mixed vegetation and hilly region, more cloud using moderate spatial resolution and high temporal resolution MODIS data around Guangxi province, south of China. According to banana growth lasting more 9 to 11 months, and the areas are reduced during crush season, the Maximum likelihood was used to extract the information...

Journal: :پژوهش های زراعی ایران 0
امیرحسین شیرانی راد حمید رضا جبّاری عباس دهشیری

sowing date is an important determinant of yield in canola. cultivation of winter rapeseed cultivars in semi arid regions of iran however it has high potential for production, but, mentioned cultivars are late maturity and this late maturity cause to that silique formation and seed filling periods mature in the same time with hot and dry weather condition. in contrast, spring rapeseed cultivars...

ژورنال: علوم آب و خاک 2006
شاهرخ زند‌پارسا, , علیرضا سپاسخواه, , ابوالفضل مجنونی هریس, , علی‌اکبر کامگار حقیقی, ,

Agricultural investigations use computer models for simulation of crop growth and field water management. By using these models, the effects of plant growth parameters on crop yields are simulated, hence, the experimental costs are reduced. In this paper, the model of MSM (Maize Simulation Model) was calibrated and validated for the prediction of maize forage production at Agricultural College,...

A.R. Sepaskhah M.M. Maharlooei R. Jafari S. M. Nassiri

ABSTRACT Water management is an essential concept for water intensive crop such as maize dealing with water shortage under drought conditions. Maize production is ranked after wheat and barely in Fars province, Iran. Therefore, the present study was conducted to investigate the effects of planting methods by conventional and modified planters on maize growth and yield at different irrigation re...

Journal: :علوم باغبانی ایران 0
عبدالستار دارابی . استادیار مرکز تحقیقات کشاورزی و منابع طبیعی خوزستان، ایستگاه تحقیقات کشاورزی بهبهان رضا صالحی محمدی استادیار گروه علوم باغبانی، پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج

frost occurrence during plant growth created special conditions to evaluate the effects of planting date on dry matter content and agronomical characteristics of potato cultivars influenced by natural frost in field conditions. a split-plot experiment with three replications was carried out to compare three planting dates, as main plot, from 1 to 21 november with 10 day intervals and four culti...

Journal: :پژوهش های حبوبات ایران 0
محمد ربیعی مهرداد جیلانی

in order to study the effect of planting date, row spacing and seed rate on grain yield and protein yield of faba bean (vicia faba l.), a split factorial experiment based on the complete randomized block design with three replications was conducted at research station of rice research institute of iran (rasht) during 2008-2010 for two years. experimental treatments were planting date in three l...

In order to study the impact of drought stress and planting date on safflower yield and yield components, an experiment was performed in Tabriz region in 2011. The experiment was carried out as split-split plot based on randomized complete block design. The main factor which was applied as split plot includes drought stress  with three levels:  (S1) 80 ± 3 mm evaporation from basin level of cla...

ژورنال: علوم آب و خاک 2008
حیدری‌زاده, پریسا , خواجه پور, محمدرضا , سبزعلیان, محمدضا ,

During recent years, several genotypes have been selected from Isfahan land race Kouseh. The performance of safflower selected genotypes was studied in the field conditions, at Agriculture Research Station, Isfahan University of Technology during 2003. The experiment was carried out using a split plot arrangement according to a randomized complete block design with three replications. Planting ...

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