نتایج جستجو برای: n2 90 kg nitrogenha in planting time

تعداد نتایج: 17217294  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان - دانشکده مهندسی 1392

flow in natural river bends is a complex and turbulent phenomenon which affects the scour and sedimentations and causes an irregular bed topography on the bed. for the reason, the flow hydralics and the parameters which affect the flow to be studied and understand. in this study the effect of bed and wall roughness using the software fluent discussed in a sharp 90-degree flume bend with 40.3cm ...

Canola sensitivity to delayed sowing date should be managed in such a way that the observance of crop rotation with less reduced in seed yield. The research was conducted to evaluate the yield variation of Hyola401 hybrid, affected by sowing date and nitrogen fertilizer treatments. In this study, the effect of planting date and different levels of nitrogen fertilizers on effective characteristi...

Journal: :Environmental Systems Research 2021

Abstract Background Low soil fertility and reduced seasonal rainfall contribute to low potato ( Solanum tuberosum L.) yield in Kenya. Nitrogen (N) deficiency is the major problem facing by smallholder farmers of Kenya due lack fallow. Hence an introduction supplemental irrigation with adequate application this nutrient could increase yield. The objective study was determine effects N-fertilisat...

2017
Leslie M. Delserone H. Cole

Delserone, L. M., and Cole, H., Jr. 1987. Effects of planting date on development of net blotch epidemics in winter barley in Pennsylvania. Plant Disease 71: 438-441. The influence of planting date on fall and spring net blotch epidemics (caused by Pyrenophora teres) was evaluated with the winter barley cultivar Pennrad. Experiments were conducted in Centre County, Pennsylvania, in 1982 and 198...

زاهدی, مرتضی, پورقاسمیان, نسیبه,

This experiment was conducted at the Agricultural Research Station of Isfahan University of Technolgy in 2006 to evaluate the effects of planting pattern and the level of soil moisture on two safflower cultivars. A factorial split plot arrangement was used in a randomized complete block design with three replications. Two planting patternS (flat and bed planting) and two levels of soil moisture...

Journal: :تولید گیاهان زراعی 0
کاوه لیموچی کارشناس ارشد زراعت، گروه علمی کشاورزی، مدرس دانشگاه پیام نور، تهران عطااله سیادت استاد دانشگاه آزاد اسلامی، واحد دزفول، دانشکده کشاورزی و منابع طبیعی، دزفول عبدالعلی گیلانی استادیار مرکز تحقیقات کشاورزی و منابع طبیعی استان خوزستان

this study was aimed at evaluating the effects of planting’s different dates on the trend of leaf area index, dry biomass weight and panicle weight in addition to the yield of rice varieties for one year in the north region of khuzestan, as spilt plots in the form of fully random blocks in three repetitions. main factor was the date of planting at three levels (26 may, 10 jun, 26 jun) and the s...

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

ABSTRACT- Maize production, which is ranked after wheat and barely in Fars province, Iran, needs a considerable amount of irrigation water that is not available in scarce water conditions in drought situations. Therefore, proper planting method can improve irrigation water management. The objectives of the present study were to investigate the effects of two planting methods, on-bed and in furr...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه فردوسی مشهد - دانشکده علوم 1376

saluk mount is selected for devonian biostratigraphy. this area located at southwest of bojnurd. in this study three sections are selected and two sections, chahar-borj and tabar sections with a thickness of 650 m, which consist mainly of calcareous sediments was studied in detailed but third section, qelli section, with a thickness of about 450m which consist mainly of sandstone and evaporates...

Journal: :آب و خاک 0
محمد کریمی جواد باغانی محمد جلینی

introduction: one of the serious problems in the further development of maize cultivation is increasing irrigation efficiency. using conventional irrigation causes a shortage of water resources to increase the acreage of the crop. with regard to the development of maize cultivation, agronomic and executable methods must be studied to reduce water consumption. using drip irrigation system is mos...

Journal: :چغندرقند 0
محمد حیدری کارشناس ارشد مکانیزاسیون علی‎محمد برقعی استاد گروه ماشین‎های کشاورزی دانشگاه تهران

the objective of this study was to determine the allowed and desired limits for heavy soils of texture (clay loom), as it has operational capability (friability), these limits were 6.34 mm for planting and 10.62 mm for harvesting in each raining or irrigation episode. we determined some factors that affect soil wetness and water content as follow: the amount and severity of rain, the condition ...

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