نتایج جستجو برای: d 15 and e 50 ton ha

تعداد نتایج: 17531256  

Journal: :Science 2004
R Lal

The carbon sink capacity of the world's agricultural and degraded soils is 50 to 66% of the historic carbon loss of 42 to 78 gigatons of carbon. The rate of soil organic carbon sequestration with adoption of recommended technologies depends on soil texture and structure, rainfall, temperature, farming system, and soil management. Strategies to increase the soil carbon pool include soil restorat...

بختیار فتاحی, سهیلا آقا بیگی امین علیرضا ایلدرمی, مائده قربان پور دلیوند

تغییر کاربری و رها شدن اراضی، چرای مفرط و ازدیاد و گسترش گونه‌های ناخواسته از مهمترین چالش‌های  مراتع کشور هستند. به همین منظور در این تحقیق تلاش شده‌است که با ارائه یک راهکار اصلاحی واحد با چالش‌های مذکور مبارزه شود؛ بنابراین از گونه یونجه دیم چند ساله برای کشت در مراتع تخریب شده پوشیده از ورک یا اراضی رهاشده استفاده شد تا ضمن احیا مراتع، موجبات ترسیب کربن هوا به مقدار چشمگیر در اکوسیستم احیاش...

H. R. Khazaei H. Sodaeeizadeh M. Bannayan Aval R. Yazdani Biouki,

In order to investigate the effect of urea, Azocompost and cutting on growth characteristics of Oregano, a factorial split-plot experiment was conducted based on randomized complete block design with three replications at Yazd and Mashhad, Iran, during 2012-2013 growing season. Four urea levels and four Azocompost levels (to provide 0, 40, 80 and 120 kg N.ha-1 each) for Yazd location )0, 43.5, ...

Journal: :Jurnal agronomi Indonesia 2022

Intensifikasi tebu keprasan lahan kering merupakan salah satu cara dalam rangka meningkatkan produksi gula nasional. Penelitian ini bertujuan untuk mempelajari respon pertumbuhan dan hasil dua varietas terhadap residual kompos blotong pupuk anorganik pada budidaya kering. dilakukan bulan Agustus 2019 sampai dengan Juli 2020 pertama di percobaan PT Kebun Tebu Mas, Lamongan, Jawa Timur rancangan ...

H. R. Khazaei H. Sodaeeizadeh M. Bannayan Aval R. Yazdani Biouki,

In order to investigate the effect of urea, Azocompost and cutting on growth characteristics of Oregano, a factorial split-plot experiment was conducted based on randomized complete block design with three replications at Yazd and Mashhad, Iran, during 2012-2013 growing season. Four urea levels and four Azocompost levels (to provide 0, 40, 80 and 120 kg N.ha-1 each) for Yazd location )0, 43.5, ...

Journal: :تحقیقات آب و خاک ایران 0
آلاله متقیان همت اله پیردشتی محمدعلی بهمنیار ارسطو عباسیان

this fertility experiment was carried out using split plots based on a randomized complete block design of three replications in 2006 at sari agricultural sciences and natural resources university. the aim of the experiment was to investigate some macronutrient and micronutrient accumulation in leaves of different soybean cultivars as influenced by some organic fertilizer types and levels. main...

G.R. Daryanabard M. Monjezi Veysi N. Mahboobi Soofiani, T. Valinassab

This trawl survey was carried out during 2013 for the stock assessment of families Haemulids, Nemipterids and Ariids in the Oman Sea. Sampling was carried out at five different stratum and depths. The highest value of CPUA of Haemulidae was estimated for Pomadasys stridens in “B” stratum (885.78 kg nm-2), for Pomadasys kaakan at depths of 10-20 m  (330.35 kg nm-2), and for Nemipteridae it was e...

Journal: :Poultry science 1997
P C Augustine J L McNaughton E Virtanen L Rosi

At 7 d postinoculation (DPI) with a mixed culture of avian Eimeria species, 21-d-old chicks maintained in batteries and floor pens on a diet containing 0.15% (3 lb/ton) betaine plus 66 ppm (60 g/ton) salinomycin were significantly heavier and had significantly lower feed conversion ratios and mortality than chicks fed diets containing 0.15% betaine or 66 ppm salinomycin alone, or the control di...

اصغری, شکراله, اوستان, شاهین , حسینی خانمیری, نیره , هاشمی مجد, کاظم, کیوان بهجو, فرشاد ,

Utilizing sewage sludge as a source of cheap fertilizer and rich in nutrients is common in some parts of Iran. But, too much application causes accumulation of heavy metals in soil, which results in soil pollution and transfer of this pollution to food chain and endangers human and animal health. The aim of this research was to investigate the effect of biological sludge of Tabriz petrochemical...

Journal: :مهندسی زراعی 0
حمیدرضا متین فر استادیار گروه خاکشناسی دانشکده کشاورزی دانشگاه لرستان منوچهر کلهر کارشناس ارشد مرکز تحقیقات کشاورزی و منابع طبیعی استان لرستان افشین شعبانی دانشجوی کارشناسی ارشد سنجش از دور و سیستم اطلاعات جغرافیایی دانشگاه تهران صالح آرخی استادیار گروه جغرافیا، دانشگاه گلستان

the rate of soil erosion and sediment yield estimation in the catchment areas is considered as an important factor for soil and water conservation practices. due to difficulties and restrictions in common soil erosion methods, applying a high accuracy method with lowest cost and time consuming would be necessary. assessment of soil loss in hilly areas with capacity of rang land that has changed...

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