نتایج جستجو برای: soil sciences
تعداد نتایج: 320052 فیلتر نتایج به سال:
Serious global issues such as poverty, illness, food prices, climate changes, global market, pollution, pest adaptation and resistance, soil degradation, decreasing biodiversity and desertification can be explained by the increasing artificialization of human society. Since most issues are now intertwined they cannot be solved anymore by the classical fireman approach. In that respect, the stru...
W E I Z H E N G , * , † , ‡ S C O T T R . Y A T E S , ‡ S H A R O N K . P A P I E R N I K , § A N D M I N G X I N G U O † , ‡ Department of Environmental Sciences, University of California, Riverside, California 92521, USDA-ARS, Soil Physics and Pesticides Research Unit, George E. Brown Jr. Salinity Laboratory, Riverside, California 92507, and USDA-ARS, North Central Soil Conservation Research ...
Soybean [Glycine max (L.) Merr.] yield in claypan soils varies systematically with soil properties and landscape position. This is likely caused by soil interactions with soybean roots. Field observations of soybean root distribution are needed to reveal its effect on yield variability. This study examined profi le distributions of soybean root length density (RLD) and average root diameter (AR...
Nancy Collins Johnson,* Julie Wolf and George W. Koch Departments of Environmental Sciences, Biological Sciences, and the Merriam-Powell Center for Environmental Research, Northern Arizona University, Flagstaff, AZ 86001-5694, USA *Correspondence: E-mail: [email protected] Abstract We examined plant community responses to interactions between arbuscular mycorrhizal (AM) fungi and availabili...
Papers published in Hydrology and Earth System Sciences Discussions are under open-access review for the journal Hydrology and Earth System Sciences Abstract A three-layer TOPMODEL is here constructed by integrating three components, diffusion wave approach into surface flow, soil moisture deficit into interflow and exponential recession curve function into base flow. Sensitivity analysis revea...
a University of Wisconsin–Madison, Department of Soil Science, FD Hole Soils Lab, 1525 Observatory Drive, Madison 53706 WI, USA b University of Waikato, Department of Earth and Ocean Sciences, Private Bag 3105, Hamilton 3240, New Zealand c National Taiwan University, Department of Agricultural Chemistry, Taipei 10617, Taiwan d The Pennsylvania State University, Department of Ecosystem Science a...
BY-PLANT PREDICTION OF CORN GRAIN YIELD USING OPTICAL SENSOR READINGS AND MEASURED PLANT HEIGHT Kent Martin a , William Raun b & John Solie c a Agronomy Department, Kansas State University, Garden City, Kansas, USA b Department of Plant and Soil Sciences, Oklahoma State University, Stillwater, Oklahoma, USA c Department of Biosystems and Agricultural Engineering, Oklahoma State University, Stil...
Molecular Plant Sciences Program (A.L.H., C.M.S.) and Department of Crop and Soil Science (C.M.S.), Washington State University, Pullman, Washington 99164–6420; United States Department of AgricultureAgricultural Research Service, Wheat Genetics, Quality, Physiology, and Disease Research Unit (C.M.S.), Pullman, Washington 99164–6420; and University of Tsukuba, Gene Research Center, Tsukuba, Jap...
Introduction Conclusions References Tables Figures Back Close Full Screen / Esc Papers published in Hydrology and Earth System Sciences Discussions are under open-access review for the journal Hydrology and Earth System Sciences Abstract Introduction Conclusions References Tables Figures Back Close Full Screen / Esc Printer-friendly Version Interactive Discussion EGU Abstract A simplified, vert...
یکی از مشکلات منابع طبیعی ایران کمبود اطلاعات از اکو سیستم ها است که در نهایت با سیر قهقرایی پتانسیل های آب و خاک و پوشش گیاهی منجر به بیابان زایی میگردد.برای مطاله بیابان زایی و تعیین سرعت و روندآن،دامنه وسیعی از مجموعه داده ها و اطلاعات مکانی و زمانی مورد نیاز است و لازم است که شاخص های متعددی مانند فرسایش خاک،شوری خاک وآب،ترکیب پوشش های گیاهی و فراوانی آنها،شدت خشکی،انهدام موازنه بیلان آبی،پ...
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