Anhydrous ammonia – cold liquid vs hot gas systems of application

Non-Peer Reviewe

Impact of row spacing, seeding rate and seeding date on soybean

Non-Peer Reviewe

Soil conservation through extended crop rotations effective fertilizer application

Non-Peer ReviewedA reduced frequency of summerfallowing associated with extended rotations could be beneficial in terms of helping to arrest and possibly overcome the degree of soil degradation that has taken place. However, in the east central region of Saskatchewan, extended stubble cropping is frequently perceived as being impractical because of the high input costs that are involved. In most cases,the major input cost in re-cropping is fertilizer. Therefore, if extended re-cropping programs are to be accepted by more of the farming community, the benefits of effective fertilizer application need to be demonstrated under local conditions. The objective of this study is to help create an awareness of the importance of effective fertilizer application in making extended crop rotations practical and profitable. This report will review the results obtained during the growing season of 1987

Wheat response to PB-50 (Penicillium bilaji), a phosphate-solubilizing inoculant

Non-Peer ReviewedPhosphorus is a key plant nutrient which is rapidly precipitated and made unavailable for plant use when added to soil as fertilizer. Every soil contains a number of microorganisms which act to solubilize fixed phosphate making it available for plant uptake. One such microorganism, a fungus called Penicillium bilaji, demonstrated superior phosphate solubilizing ability in liquid media. In greenhouse and field trials established in 1985, 1986, and 1987, bran inoculated with P. bilaji applied in-furrow consistently increased phosphate availability and uptake by crop plants. Penicillium bilaji was subsequently registered in Canada under the trade name PB-50™. Trials were established at 38 locations in 1988 and 1989 to examine the effect of seed inoculated P. bilaji on wheat yield over increasing rates of phosphate fertilizer. In general, P. bilaji treatments exhibited significant yield increases over the lower check rates of phosphate fertilizer. As phosphate fertilizer rates approached -recommended levels, yield differences due to P. bilaji tended to decrease

Adrenergic receptors. Models for regulation of signal transduction processes.

Adrenergic receptors are prototypic models for the study of the relations between structure and function of G protein-coupled receptors. Each receptor is encoded by a distinct gene. These receptors are integral membrane proteins with several striking structural features. They consist of a single subunit containing seven stretches of 20-28 hydrophobic amino acids that represent potential membrane-spanning alpha-helixes. Many of these receptors share considerable amino acid sequence homology, particularly in the transmembrane domains. All of these macromolecules share other similarities that include one or more potential sites of extracellular N-linked glycosylation near the amino terminus and several potential sites of regulatory phosphorylation that are located intracellularly. By using a variety of techniques, it has been demonstrated that various regions of the receptor molecules are critical for different receptor functions. The seven transmembrane regions of the receptors appear to form a ligand-binding pocket. Cysteine residues in the extracellular domains may stabilize the ligand-binding pocket by participating in disulfide bonds. The cytoplasmic domains contain regions capable of interacting with G proteins and various kinases and are therefore important in such processes as signal transduction, receptor-G protein coupling, receptor sequestration, and down-regulation. Finally, regions of these macromolecules may undergo posttranslational modifications important in the regulation of receptor function. Our understanding of these complex relations is constantly evolving and much work remains to be done. Greater understanding of the basic mechanisms involved in G protein-coupled, receptor-mediated signal transduction may provide leads into the nature of certain pathophysiological states

ECOLOGICAL RESTORATION OF DISTURBED LOW-ARCTIC UPLAND HEATH USING LOCALLY SOURCED, TRANSPLANTED VEGETATIVE TURFS

Arctic environments have undergone ecological disturbances from industrial resource extraction for decades, yet knowledge of arctic plant-soil systems and effective means of ecological restoration is still largely unknown and understudied. To gain a better understanding of restoring arctic plant communities following mining disturbance, we examined whole turf transplants and shredded tundra material in maintaining vegetative community characteristics and soil nutrient concentrations two years post-transplantation onto disused gravel quarries. Community characteristics, and recovery of turf harvesting locations were determined through quadrat assessments, and soil nutrients were assessed through ion chromatography of soil samples. Additional turfs were harvested and transported to the University of Saskatchewan to investigate the effects of turf-adjacent fertilization on turf and substrate community characteristics, above and belowground biomass, and distance of vegetation expanding from the turf. Quadrat assessments were conducted to investigate community characteristics, and above and belowground biomass was harvested at specific distance increments from the turf. DNA metagenomics was used to identify the species responsible for expansion Overall, we found turf transplants were capable of surviving transplantation and extreme environmental conditions and transferred native species and vegetative cover to disturbed sites. The application of shredded tundra material may be effective at re-instating non-vascular communities over a large area, although requires greater protection from wind and water erosion. We found belowground expansion far exceeded aboveground and that graminoids were primarily responsible for this expansion. Fertilization of turf’s surroundings increases belowground biomass and the development of biological soil crusts on adjacent substrates, without impacting the development of vegetation within the turfs. We recommend that restoration practitioners seek to transplant forb and graminoid-dominated communities, as these communities will likely i) survive transplanting better than shrub-dominated communities, ii) stimulate development of organic layers and soil nutrient enrichment, iii) introduce common and critical nitrogen-fixing species, and iv) present the greatest likelihood of vegetative expansion. Further research is needed to optimize this technique in arctic environments; however, the results of this research indicate that turf transplants can maintain key plant-soil interactions allowing for the continued survival of arctic vegetative communities, along with expansion, and modification of their immediate surroundings within disturbed sites

Nitrogen rate for irrigated oats on terminated alfalfa

Non-Peer Reviewe

Laboratory to the marketplace: scientific challenges in commercializing a phosphate solubilizing microorganism

Non-Peer ReviewedThe commercialization of phosphate inoculant is a challenging process. The active ingredient of the phosphate inoculant JumpStart® (P. bilaiae) was isolated in 1982. Although the concept of P solubilization was proven, much additional research was required. Cost effective manufacturing processes, packaging and QA systems, and easy-to-use, shelf stable formulations needed to be developed. Extensive field research to confirm efficacy was needed. Comprehensive data on compatibility with seed-applied pesticides were required. Development continues to be an on-going process with the use of the product on new crops, improved production methods and formulations, new applications, and continuing market research to monitor changing farmer needs

A physical form exploration : mixed-use conversion of several downtown commercial buildings

Thesis. 1977. M.Arch.--Massachusetts Institute of Technology. Dept. of Architecture.MICROFICHE COPY AVAILABLE IN ARCHIVES AND ROTCH.Bibliography : leaf 58.by Marcia K. Hnatowich.M.Arch

Broderick Irrigated Field Demonstrations of Enhanced Efficiency Nitrogen Fertilizers Applied on Canola

Non-Peer ReviewedProducers are searching for ways to conserve time in fertilizer operations. These projects demonstrated the use of specialty nitrogen fertilizer products applied irrigated canola production as an alterative to spring banding. These field scale projects were conducted with irrigators in the Outlook area in 2017 and 2018