scholarly journals 645 Using Site-specific Approaches to Advance Potato Management in Irrigated Systems

HortScience ◽  
1999 ◽  
Vol 34 (3) ◽  
pp. 559A-559
Author(s):  
Joan R. Davenport
Keyword(s):  
Pacific Northwest ◽  
Farming Systems ◽  
Fertilizer Application ◽  
Variable Rate ◽  
Local Conservation ◽  
Row Crops ◽  
Site Specific ◽  
The Pacific ◽  
Working Together ◽  
Conducting Research

Potato (Solanum tuberosum L.) is grown extensively throughout the Pacific Northwest as a high-value crop in irrigated rotations with other row crops such as wheat (Triticum aestivum L.) and corn (Zea mays L.)—both field and sweet. Center pivots are predominant irrigation systems. Soil texture ranges from coarse sands to finer textured silt loams and silts and can vary within one field, often with very hilly topography. Site-specific management is being evaluated as an approach to help to optimize inputs (water, seed, agricultural chemicals) to maintain or enhance yield and reduce the potential of negative environmental impacts in these farming systems. Currently variable rate fertilizer application technology and harvest yield monitoring equipment are commercially available for these systems. Variable rate seeding and variable rate irrigation water application technologies are developed but not fully commercialized and variable rate pesticide application equipment is in development. At the Irrigated Agr. Res. and Ext. Ctr. in Prosser, Wash., we have a team of research scientists (both university and USDA/ARS), interested individuals from local industry, and other key organizations (e.g., local conservation districts) who are working together to evaluate different site specific technologies, improve the ability to use available tools, and to improve decision-making ability by conducting research both on farm and in research plots.

scholarly journals Using Site-specific Approaches to Advance Potato Management in Irrigated Systems

2000 ◽  
Vol 10 (3) ◽  
pp. 452-457 ◽  
Author(s):  
Joan R. Davenport ◽  
Mary J. Hattendorf
Keyword(s):  
Sweet Corn ◽  
Agricultural Research ◽  
Farming Systems ◽  
Fertilizer Application ◽  
Variable Rate ◽  
Local Conservation ◽  
Row Crops ◽  
Site Specific ◽  
The Pacific ◽  
Conducting Research

Potatoes (Solanum tuberosum L.) are grown extensively throughout the Pacific northwestern United States as a high value crop in irrigated rotations with other row crops such as wheat (Triticum aestivum L.) and both field and sweet corn (Zea mays L.). Center pivots are the predominant irrigation systems. Soil texture ranges from coarse sands to finer textured silt loams and silts and can vary within one field, particularly in fields with hilly topography. Site specific management is being evaluated as an approach to help to optimize inputs (water, seed, agricultural chemicals) to maintain or enhance yield and reduce potential negative environmental impacts from these farming systems. Currently, variable rate fertilizer application technology and harvest yield monitoring equipment are commercially available for potato. Variable rate seeding and variable rate irrigation water application technologies are developed but not fully commercialized and variable rate pesticide application equipment is in development. At the Irrigated Agricultural Research and Extension Center in Prosser, Wash., we have a team of research scientists, interested individuals from local industry, and other key organizations (e.g. local conservation districts) who are working together to evaluate different site specific technologies, improve the ability to use available tools, and to improve decision-making ability by conducting research both on farm and in research plots.

Diseases of wheat and barley in conservation cropping systems of the semiarid Pacific Northwest

1996 ◽  
Vol 11 (2-3) ◽  
pp. 95-103 ◽  
Author(s):  
Richard W. Smiley
Keyword(s):  
Soil Erosion ◽  
Disease Management ◽  
Pacific Northwest ◽  
Conservation Tillage ◽  
Cropping Systems ◽  
Farming Systems ◽  
Tillage Practices ◽  
Conservation Farming ◽  
The Pacific ◽  
Summer Fallow

AbstractDiseases continue to be important constraints in wheat and barley conservation cropping systems in the semiarid Pacific Northwest. Several diseases are more damaging in highthan low-residue seedbeds, and in crops planted during early autumn to reduce soil erosion during winter, especially unirrigated winter wheat in rotation with summer fallow in low rainfall zones (250–400 mm). Changes in cropping systems in the region have made disease management and maintenance of yield goals and farm profitability more challenging because disease management often is more complex and expensive with conservation tillage than inversion tillage. Practices being developed to meet this challenge are reviewed for diseases that are particularly trouble some in conservation farming systems of the Pacific Northwest.

Advances in Fisheries Bioengineering

2008 ◽  
Keyword(s):  
Pacific Northwest ◽  
River Flow ◽  
Fish Passage ◽  
Anadromous Fish ◽  
Hydroelectric Dams ◽  
Dissolved Gas ◽  
Site Specific ◽  
Total Dissolved Gas ◽  
The Pacific ◽  
Fish Survival

<em>Abstract.</em>—Historically, spillways and sluiceways at hydroelectric dams were constructed as conduits for transporting excess river flow or debris with little focus on their potential for safe fish passage routes. In recent times, however, these conveyances are increasingly viewed as viable fish passage routes and are used to increase potential survival for the declining salmonid populations, particularly in the Pacific Northwest. However, spill is uneconomical and, with some spillway configurations, may cause potentially lethal levels of total dissolved gas (TDG) saturation in the river. Recent estimates (direct effects) of juvenile anadromous fish survival and condition after passing nonturbine exit routes at hydro dams have shown much variation (83–100% survival) depending upon site-specific hydraulic characteristics, trajectory of entrained fish, and obstructions in the flow path. Efforts are underway to modify spillways and bypasses at several hydroelectric dams to decrease TDG and eliminate and/or minimize fish injury.

scholarly journals Prediction of Canola Residue Characteristics Using Near-Infrared Spectroscopy

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Tami L. Stubbs ◽  
Ann C. Kennedy
Keyword(s):  
Infrared Spectroscopy ◽  
Pacific Northwest ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Cropping Systems ◽  
Farming Systems ◽  
Neutral Detergent Fiber ◽  
Residue Decomposition ◽  
Spring Canola ◽  
The Pacific

Little work has been done to characterize and quantify the residue traits affecting decomposition of winter and spring canola (Brassica napus L.) residue in dryland farming systems of the Pacific Northwest United States. Traditional methods of characterizing residue fiber and nutrients are time-consuming and expensive and require large quantities of chemical reagents. The goal of this research was to determine whether near-infrared spectroscopy (NIRS) could accurately predict neutral detergent fiber (NDF), acid detergent fiber (ADF), acid detergent lignin (ADL), carbon (C), and nitrogen (N) of canola stems, litter, and roots and decomposition of canola stems. Canola residue varied in decomposition, fiber, and nutrients by year, location, and type. NIRS predictions were successful for NDF and ADF in 2011 (standard error of prediction SEP<2.67; R2>0.95) and NDF, ADF, and N in 2012 (SEP<2.38; R2>0.91). Other predictions for residue fiber and nutrient characteristics were considered moderately successful. Prediction of canola residue decomposition with NIRS was useful for screening purposes. Near-infrared spectroscopy shows promise for rapidly and reproducibly predicting some canola residue fiber and nutrient traits and may be useful for estimating residue decomposition potential in dryland conservation cropping systems.

Site-Specific Trade-offs of Harvesting Cereal Residues as Biofuel Feedstocks in Dryland Annual Cropping Systems of the Pacific Northwest, USA

2014 ◽  
Vol 7 (2) ◽  
pp. 598-608 ◽  
Author(s):  
David R. Huggins ◽  
Chad E. Kruger ◽  
Kathleen M. Painter ◽  
David P. Uberuaga
Keyword(s):  
Pacific Northwest ◽  
Cropping Systems ◽  
Site Specific ◽  
Trade Offs ◽  
The Pacific ◽  
Cereal Residues

Eleusine indica (goose grass).

2021 ◽  
Author(s):  
Julissa Rojas-Sandoval ◽  
Pedro Acevedo-Rodríguez
Keyword(s):  
Farming Systems ◽  
Natural Forests ◽  
Single Plant ◽  
Row Crops ◽  
Eleusine Indica ◽  
The Pacific ◽  
The Pacific Ocean ◽  
The Caribbean ◽  
Environmental Weed ◽  
Disturbed Habitats

Abstract E. indica is primarily listed as an agricultural and environmental weed (Randall, 2012) and is considered a "serious weed" in at least 42 countries (Holm et al., 1979). This species is described as a "dominant weed" especially in farming systems and annual row-crops where it grows vigorously and produces abundant seedlings (Holm et al., 1979). A single plant may produce more than 50,000 small seeds, which can be easily dispersed by wind and water, attached to animal fur and machinery and as a contaminant in soil (Waterhouse, 1993). E. indica invades disturbed habitats in natural areas and the margins of natural forests and grasslands, marshes, stream banks and coastal areas. It is also a common weed along roads, pavements, and powerline corridors (Queensland Department of Primary Industries and Fisheries, 2011). Currently it is listed as invasive in several countries in Europe, Asia, Central and South America, the Caribbean and on many islands in the Pacific Ocean (see Distribution Table for details).

Suitability of Natural Areas for Representing Ecological Change in the Pacific Northwest

2019 ◽  
Vol 39 (4) ◽  
pp. 452
Author(s):  
Margaret H. Massie ◽  
Todd M. Wilson ◽  
Anita T. Morzillo ◽  
Emilie B. Henderson
Keyword(s):  
Pacific Northwest ◽  
Ecological Change ◽  
Natural Areas ◽  
The Pacific
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