نتایج جستجو برای: agricultural r

تعداد نتایج: 544555  

2012
J. A. P. Beck G. Dissertori

401-0252-00 U Mathematik II: Analysis II und Lineare Algebra und Systemanalyse I Di 8-10 für Studiengang Agrarwissenschaft bzw. Lebensmittelwissenschaft. Do 9-11 oder Do 15-17 für Studiengang Erdwissenschaften. Do 13-15 für Studiengang Umweltnaturwissenschaften. 2 hrs Tue 08-10 CAB G52 HG E1.2 HG E22 HG E33.3 HG F26.3 Thu 09-11 HG E21 HG E22 13-15 HG D7.2 HG E22 HG F26.5 LFW E13 LFW E15 15-17 H...

Agricultural extension services have been playing a central role in transformation process of agricultural sector in Nigeria but there are challenges which affect the quality of service delivery especially increasing cost of services and poor funding and therefore, promoting emergence of new extension strategies offered by private sector . The study investigated the perception of maize crop far...

2007
W. W. Wallender K. K. Tanji J. M. Lord C. V. Moore R. R. Robinson E. C. Stegman

The principles of irrigation and drainage in cracking soils differ markedly from non-cracking soils, and are not thoroughly understood. This paper presents a conceptual model to simulate water and salt flows in cracking soils of the Imperial Valley, CA, in the presence of ground water that contributes partially to ET demand of crops. A salt reactivity function is introduced in the model to acco...

2010
Jennifer Kraus Stephanie Cleveland Melodie L. Putnam Karen E. Keller Robert R. Martin Ioannis E. Tzanetakis

Jennifer Kraus, Stephanie Cleveland, and Melodie L. Putnam, Department of Botany and Plant Pathology, Oregon State University, Corvallis 97331; Karen E. Keller and Robert R. Martin, Horticultural Crops Research Laboratory, United States Department of Agriculture–Agricultural Research Service, Corvallis, OR 97330; and Ioannis E. Tzanetakis, Department of Plant Pathology and Cell and Molecular Bi...

2013
S. Ashraf Vaghefi S. J. Mousavi K. C. Abbaspour R. Srinivasan H. Yang

S. Ashraf Vaghefi, S. J. Mousavi, K. C. Abbaspour,* R. Srinivasan and H. Yang 1 Department of Civil and Environmental Engineering, Amirkabir University of Technology, Tehran, Iran 2 Eawag, Swiss Federal Institute of Aquatic Science and Technology, PO Box 611, 8600, Dübendorf, Switzerland 3 Texas A&M University, Texas Agricultural Experimental Station, Spatial Science Lab, College Station, TX, 7...

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