关于北美阔叶材行业优先研究项目的调查研究     

David Brinberg  Earl Kline  Delton Alderman  Philip Araman  Ed Cesa  Steve Milauskas  Tom Walthousen  Jan Wiedenbeck  管宁 《国际木业》2008,38(6):39-39

美国林产品杂志58卷37期发表了David Brinberg等人的论文,报道了一项关于如何确定北美阔叶材行业优先研究项目的调查研究,论文指出了过去所用方法的缺点,报道了一种谋求改进的新方法。  相似文献   

Enhancing the effectiveness of biological control programs of invasive species through a more comprehensive pest management approach          下载免费PDF全文

Joseph M DiTomaso  Robert A Van Steenwyk  Robert M Nowierski  Jennifer L Vollmer  Eric Lane  Earl Chilton  Patrick L Burch  Phil E Cowan  Kenneth Zimmerman  Christopher P Dionigi 《Pest management science》2017,73(1):9-13

Invasive species are one of the greatest economic and ecological threats to agriculture and natural areas in the US and the world. Among the available management tools, biological control provides one of the most economical and long‐term effective strategies for managing widespread and damaging invasive species populations of nearly all taxa. However, integrating biological control programs in a more complete integrated pest management approach that utilizes increased information and communication, post‐release monitoring, adaptive management practices, long‐term stewardship strategies, and new and innovative ecological and genetic technologies can greatly improve the effectiveness of biological control. In addition, expanding partnerships among relevant national, regional, and local agencies, as well as academic scientists and land managers, offers far greater opportunities for long‐term success in the suppression of established invasive species. In this paper we direct our recommendations to federal agencies that oversee, fund, conduct research, and develop classical biological control programs for invasive species. By incorporating these recommendations into adaptive management strategies, private and public land managers will have far greater opportunities for long‐term success in suppression of established invasive species. © 2016 Society of Chemical Industry  相似文献   

Evaluation of a flat-plate PIT tag interrogation system at Bonneville Dam     

Edmund P Nunnallee  Earl F Prentice  Bruce F Jonasson  Whitney Patten 《Aquacultural Engineering》1998,17(4):261-272

In the spring of 1996 and 1997, a prototype 400 kHz flat-plate (pass-by) passive integrated transponder tag interrogation (PIT tag) system was installed at the terminus of the downstream migrant (DSM) channel of the Bonneville Dam First Powerhouse, located on the Columbia River. The system was designed to interrogate previously PIT tagged juvenile salmonids migrating down the Columbia River without interfering with the traditional subsampling of fish passing through the facility. In addition, the design enables fish of virtually any size, and debris, to pass over the system's antennas without the port restrictions imposed by traditional pass-through PIT tag interrogation systems. We describe the fish facility in addition to the flat-plate system and its operation. The system tag reading efficiency was evaluated during 1996 and 1997 using a direct method based on the release of known numbers of tagged test fish and an indirect statistical procedure based on tagged run-at-large fish. The results showed that PIT tag reading efficiency during both years using the direct method averaged 97%, while that using the statistical procedure averaged 99% for the dual multiplexed antenna array. During the 1996 and 1997 field seasons 4371 and 14 733 fish, respectively, were recorded. Daily system functionality was monitored using stick tests (i.e., the passing of PIT tagged sticks across the antenna array).  相似文献   

Sectional notes     

L. M. Black  J. G. Milward  H. L. Bailey  E. L. Newdick  A. G. Tolaas  Earl Hudgson  K. W. Lauer 《American Journal of Potato Research》1933,10(8):165-168

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Sectional notes     

L. M. Ware  Frank E. Garrett  M. A. Lindsay  Ernest Marx  A. H. Eddins  John L. Toevs  W. B. Ward  John S. Gardner  J. C. Campbell  H. R. Talmage  E. V. Hardenburg  Marx Koehnke  M. E. Gardner  Earl B. Tussing  W. C. Barnes  John Noonan  Harold L. Bailey  Charles D. Gaines 《American Journal of Potato Research》1945,22(6):188-196

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Sectional notes     

M. A. Lindsay  W. B. Ward  Marx Koehnke  J. C. Campbell  H. R. Talmage  E. V. Hardenburg  Earl B. Tussing  C. A. Henderson  O. D. Burke 《American Journal of Potato Research》1944,21(8):234-239

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Sectional notes     

C. H. Metzger  B. A. Brown  Eugene Whitman  W. B. Ward  H. A. Reiley  J. C. Campbell  E. V. Hardenburg  Earl B. Tussing  Chester E. Otis  C. A. Henderson  K. W. Lauer 《American Journal of Potato Research》1943,20(10):289-297

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The leucocytozoidae of South African birds: Caprimulgidae, Columbidae, Gruidae and Spheniscidae.     

G F Bennett  R A Earlé  M A Peirce 《The Onderstepoort journal of veterinary research》1992,59(4):229-234

Four species of Leucocytozoon, L. caprimulgi of the Caprimulgidae (nightjars), L. marchouxi of the Columbidae (pigeons and doves), L. grusi of the Gruidae (cranes) and L. tawaki of the Spheniscidae (penguins) are re-described. Leucocytozoon turtur is declared a synonym of L. marchouxi.  相似文献   

EQUINE PARANASAL SINUSOGRAPHY     

Eddy  Behrens  MV  Jim  Schumacher  DVM  MS  Earl  Morris  DVM  MS  Mike  Shively  DVM  MS  PhD 《Veterinary radiology & ultrasound》1991,32(3):98-104

Contrast paranasal sinusography was a simple procedure that enhanced evaluation of the paranasal sinuses in the standing horse. Two techniques of positive-contrast paranasal sinusography were developed using cadavers and sedated horses. For both techniques, 37% organically bound iodine was used. For the first technique, the conchofrontal sinus was injected with 30 ml of contrast medium followed by an additional 100 ml and 70 ml. For the second technique, the rostral maxillary sinus was injected with 20 ml followed by an additional 50 ml. Each technique enhanced visualization of different paranasal sinuses, and each was necessary for complete positive-contrast radiographic evaluation of the paranasal sinuses. The techniques of positive-contrast radiographic evaluation of the paranasal sinuses are described.  相似文献   

Effect of changing energy prices on commodity prices and farm income     

Cameron Short  Burton C. English  Earl O. Heady 《Agricultural Systems》1984,14(2):107-116

Tatonnement programming is used to examine the effect of energy prices on commodity prices and farm income. This method uses a national interregional linear programming model in conjunction with demand equations for feedgrains, soybeans and wheat. This spatial programming model is solved iteratively with these demand functions using an algorithm based upon the Walrasian tatonnement process. While the model is static in nature, it indicates that once adjustment to a doubling of energy prices occurs returns to land will increase by 10·8%. Commodity prices will increase 24·1, 18·7 and 9·9% for feedgrains, wheat and soybean, respectively, and demand will decrease 2·2, 1·9, and 0·9% for these same three commodities.  相似文献