نتایج جستجو برای: soil management equipment

تعداد نتایج: 1080471  

2011
John Gulliver

Urban areas typically have a high degree of impervious surfaces— that is, roads, parking lots, rooftops, and other surfaces that impede the movement of water into the soil. In predevelopment areas with natural ground cover, over half of precipitation infiltrates the soil to replenish groundwater tables, and only a small amount (10%) remains as runoff into stormwater systems, rivers, and lakes. ...

2016
G. Arjen de Groot Gerard A. J. M. Jagers op Akkerhuis Wim J. Dimmers Xavier Charrier Jack H. Faber

Citation: de Groot GA, Jagers op Akkerhuis GAJM, Dimmers WJ, Charrier X and Faber JH (2016) Biomass and Diversity of Soil Mite Functional Groups Respond to Extensification of Land Management, Potentially Affecting Soil Ecosystem Services. Front. Environ. Sci. 4:15. doi: 10.3389/fenvs.2016.00015 Biomass and Diversity of Soil Mite Functional Groups Respond to Extensification of Land Management, P...

2013
Fayu SUN Lei GAO Jinlong ZOU Tao WU Jing LI

For failure prediction and information interaction problems of multi-equipment health management, fault prediction technology of multi-equipment and multi-parameter was proposed based on the system network. The state judgment and fault diagnosis algorithm is adopted by SOM self-organizing feature map neural network, the network parameters and node structure are changed adaptively, and the real-...

2000
Michelle M. Wander Laurie E. Drinkwater

Soil quality is not a purchased technology; instead, it is a concept that can be used in making land management decisions. Researchers have generally agreed upon the soil properties that determine soils’ capacity to function and have emphasized that soil quality must be understood in context. Soil quality research has included the following: (1) soil management research, where the effects of ma...

2006
C. A. Murphy B. L. Foster M. E. Ramspott K. P. Price

Management regimes of varying types and intensities can have profound impacts on grassland soil quality. Plus, there has recently been increased interest in finding soil quality indicators that are reflective of historical and current land management. We surveyed soil quality of privately owned grasslands in northeastern Kansas differing in their cultivation histories and current land-use (cool...

2016
Charles V. Privette Ahmad Khalilian William Bridges Stephen Katzberg Omar Torres Young J. Han Joe Mari Maja Xin Qiao C. V. Privette

Many agricultural fields across the country have a high degree of variability in soil type and water holding capacity that affects irrigation management. One way to overcome problems associated with the field variability for improving irrigation management is to utilize a site-specific irrigation system. This system applies water to match the needs of individual management zones within a field....

2007
P. Tittonell K. D. Shepherd B. Vanlauwe K. E. Giller

To guide soil fertility investment programmes in sub-Saharan Africa, better understanding is needed of the relative importance of soil and crop management factors in determining smallholder crop yields and yield variability. Spatial variability in crop yields within farms is strongly influenced by variation in both current crop management (e.g. planting dates, fertilizer rates) and soil fertili...

2005
M. Mzuku R. Khosla R. Reich D. Inman F. Smith L. MacDonald

homogeneous yield-limiting factors, for which a single rate of a specific crop input is appropriate (Doerge, 1999). The spatial variation of productivity across farm fields can be classiVarious techniques of delineating management zones fied by delineating site-specific management zones. Since productivity are currently being investigated in different parts of the is influenced by soil characte...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان تهران - دانشگاه پیام نور مرکز تهران - دانشکده علوم انسانی 1384

چکیده ندارد.

2000
C. D. ELLERS-KIRK S. J. FLEISCHER R. H. SNYDER J. P. LYNCH

Acalymma vittatum (F.) is the primary insect pest of fresh-market cucumber and melon crops in much of the eastern United States because of their herbivory and interactions with several diseases, most notably bacterial wilt. A study was conducted to determine how soil management affects viability and infectivity of an entomopathogenic nematode that may be used for the control of A. vittatum. Dos...

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