نتایج جستجو برای: 475 kg ha

تعداد نتایج: 242389  

2012
M. R. Schmer M. A. Liebig J. R. Hendrickson D. L. Tanaka R. L. Phillips

Switchgrass (Panicum virgatum L.) is being evaluated as a bioenergy crop for the northern Great Plains. Field measurements of CO2, CH4, and N2O flux are needed to estimate the net greenhouse gas (GHG) balance of this biofeedstock. The study objective was to determine effects of recommended Nitrogen (N) fertilization (67 kg ha 1 of N applied) and unfertilized switchgrass on growing season soil-a...

1998
Anwar Naseem

Fertilizer is a powerful productivity-enhancing input, but SSA uses very little. Historical trends are abysmal (Figure 1). In 1970, SSA used <5kg/ha while other developing regions used >15 kg/ha. In the 25 years from 1970 to 1995 fertilizer consumption grew only .23 kg/ha/year. Current use is only 9 kg/ha, down from OBJECTIVES AND METHODS: The research highs of 11-12. This contrasts sharply wit...

2016
Daran Rudnick Suat Irmak D. R. Rudnick S. Irmak

With uncertainty in future irrigation water availability and regulations on nutrient application amounts, experimentally determined effects of “controllable” management strategies such as nitrogen (N), water, and their combination on crop water productivity (CWP, also known as crop water use efficiency) and actual evapotranspiration (ETa) are essential. The effects of various N application rate...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه زابل - دانشکده کشاورزی 1391

چکیده: به منظور بررسی کشت مخلوط ارزن معمولی(panicummiliaceum)و گاوزبان(boragoofficinalis)تحت تأثیرتراکم های مختلف کاشت آزمایشی در قالب طرح بلوک های کامل تصادفی با سه تکرار در سال زراعی 90-1389در مزرعه تحقیقاتیدانشکده کشاورزی دانشگاه زابل اجرا گردید. هر کرت آزمایشی شامل 8 ردیف کاشت با طول 5 متر و فاصله بین ردیف ها 30 سانتیمتر بود تیمارها شامل ارزن با تراکم ثابت و فاصله بین دو بوته 4 سانتیمتر (a...

Journal: :Remote Sensing 2010
Heikki Laurila Mika Karjalainen Jouko Kleemola Juha Hyyppä

During 1996–2006, the Ministry of Agriculture and Forestry in Finland (MAFF), MTT Agrifood Research and the Finnish Geodetic Institute performed a joint remote sensing satellite research project. It evaluated the applicability of optical satellite (Landsat, SPOT) data for cereal yield estimations in the annual crop inventory program. Four Optical Vegetation Indices models (I: Infrared polynomia...

2010
MUZZAMMIL HUSSAIN

A series of experiments was carried out at Students Farm, Sindh Agriculture University, Tandojam to evaluate the effect of NPK, micronutrients and N-placement on the growth and yield of sunflower during 2005-2006. The sunflower cv. HO-1 was studied under 7 different NPK levels and placement methods (0-0-0 NPK kg ha, 6030-30 NPK kg ha (N as broadcast), 60-30-30 NPK kg ha (N as fertigation), 90-4...

عبادی, علی, وفائی, اکبر, پرمون, قاسم,

Effect of potassium and magnesium fertilizers on safflower grain yield was studied, using a factorial experiment based on completely randomized block design with three replications at the Agricultural Research Station of University of Mohaghegh Ardabili in 2011. The treatments consisted of potassium fertilizer with three levels (0, 60 and 120 kg ha-1) and magnesium fertilizer (0, 75 and 150 kg ...

Journal: :Journal of animal science 2005
S A Gunter P A Beck S Hutchison J M Phillips

To compare the performance of steer calves managed under different stocking rates (SR; 3.7, 6.2, 8.6, and 11.1 steers/ha for 140 d; chi(I1)) and N fertilization rates (112, 224, and 336 kg of N/ha; chi(I2)) in May 1996, 1997, and 1998, 72 steer calves (BW = 231 +/- 2.5 kg) were assigned randomly to one of 12 0.81-ha dallisgrass (51%)/common bermudagrass (32%) pastures. One-third of the fertiliz...

Journal: :Pest management science 2004
Shoil M Greenberg Thomas W Sappington Gary W Elzen John W Norman Alton N Sparks

In laboratory, greenhouse and field tests, we determined the effects of combining full rates of the defoliants tribufos and thidiazuron and the herbicide thifensulfuron-methyl with half rates of the insecticides lambda-cyhalothrin or azinphos-methyl, and the combination of tribufos and thidiazuron, both in half rates, on mortality of the boll weevil, Anthonomus grandis grandis Boheman and on th...

Journal: :Journal of nematology 1991
J N Sasser G Uzzell

An experiment to evaluate the control of soybean cyst nematodes compared 1-year, 2-year, and 3-year nonhost rotations with continuous soybeans (Glycine max) in 0.2-ha plots. In a second 1-year rotation, the plots were planted to soybean or corn (Zea mays) after fumigation in the spring with a split application of 1,3-dichloropropene (748.2 liters/ha). The effects of the nematicide were apparent...

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