Application Techniques

Author(s):  
C. E. Bachmann ◽  
G. Gruber ◽  
W. Konermann ◽  
A. Arnold ◽  
G. M. Gruber ◽  
...  
Agriculture ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 553
Author(s):  
Inga-Mareike Bach ◽  
Lisa Essich ◽  
Torsten Müller

Despite phosphorus resources on Earth being limited, over fertilization in many agricultural situations causes significant resource consumption. Phosphorus-recycling within agricultural production can reduce global dilution into the environment and is thus essential to secure sustainable future supply. This study investigated the fertilization efficacy of phosphorus fertilizers recycled from biogas digestates in maize shoots grown under controlled greenhouse conditions, in two soils, in a pot experiment. Variables investigated were plant-available phosphorus in soil, plant biomass production, and concentration of phosphorus, calcium, and magnesium in shoots. Soils were treated with three different fertilizer fractions, separated from biogas digestates, at equivalent phosphorus concentrations, using different combinations and application techniques, isolated or in combination, and compared to triple superphosphate (TSP) as a reference. One of the fractions (P-Salt) had effects on biomass production and plant phosphorus concentration equivalent to TSP in agricultural surface soil. In the second soil (with less active soil life and nutrient content), equivalence to TSP was achieved with combinations of two recycled fractions (P-Salt and dried solids). The enhancement of the phosphorus fertilizing effect by the solids was synergistic, indicating that the solids had a soil conditioning effect. The results show that biogas digestates are a valuable source for phosphorus recycling of fractions that have equivalent or even superior fertilizing properties compared to TSP.


2021 ◽  
pp. 1-21
Author(s):  
Carolyn E. Boyd ◽  
Ashley Busby

Archaic period hunter-gatherers of the Lower Pecos Canyonlands of southwest Texas and Coahuila, Mexico, created complex rock art murals containing elaborately painted anthropomorphic and zoomorphic figures. These figures are frequently portrayed with dots or lines emanating out of or into their open mouths. In this article, we discuss patterns in shape, color, and arrangement of this pictographic element and propose that artists used this graphic device to denote speech, breath, and the soul. They communicated meaning through the image-making process, alternating brushstroke direction to indicate inhalation versus exhalation or using different paint application techniques to reflect measured versus forceful speech. The choices made by artists in the production of the imagery reflect their cosmology and the framework of ideas and beliefs through which they interpreted and interacted with the world. Bridging the iconographic data with ethnohistoric and ethnographic texts from Mesoamerica, we suggest that speech and breath expressed in the rock art of the Lower Pecos was tied to concepts of the soul, creation, and human origins.


Weed Science ◽  
1977 ◽  
Vol 25 (1) ◽  
pp. 1-4 ◽  
Author(s):  
P.C. Quimby ◽  
E.B. Hollingsworth ◽  
R.L. McDonald

Subirrigated pot-plant systems were developed for greenhouse simulations of field methods being tested for herbicidal control of saltcedar (Tamarix pentandraPall.). The methods included: over-the-top spraying; soil injection; soil layering, with whole plants transplanted onto the herbicide layer; and soil layering by severing the roots and concomitantly injecting herbicide. Existing foliar application techniques were improved for greenhouse testing of herbicides and results from preliminary tests were apparently similar to literature reports of limited efficacy in the field. Preliminary results from these greenhouse techniques showed that root zone applications, either by soil layering or soil injection, were very effective; stem or foliar applications were less effective.


2004 ◽  
Vol 56 (3) ◽  
pp. 485-485
Author(s):  
C P F O'Donnell ◽  
C O F Kamlin ◽  
P G Davis ◽  
C J Morley

Author(s):  
R.K. Schmid ◽  
F. Ghasripoor ◽  
M. Dorfman ◽  
X. Wei

Abstract Very many gap-sealing products are now available for use in the compressor section of gas turbines. This paper attempts to give an overview of these and where they are best used. Data is presented for abradability, erosion resistance and application technique. By explaining how abradables function tribologically it is hoped that selection will be simpler for designers. New products are introduced as well as the way forward described. It is shown how with time the diversity of application techniques has decreased with thermal spraying becoming the preferred technique, and that abradables are now available to run against titanium blading up to 600°C.


Author(s):  
LI Lipkina ◽  
AV Ilnitskaya ◽  
OV Artemova ◽  
LS Tarasova ◽  
EN Mikheeva ◽  
...  

Introduction. Pesticides as biologically active compounds posing potential hazard to worker’s health may cause both acute and chronic occupational poisonings (diseases). Apart from the occupational setting, many people get exposed to pesticides during their use in personal subsidiary plots. Various pesticide application techniques, such as ground-based boom spraying of field crops, air blast spraying of gardens, aerial spraying of fields and forests, treatment of greenhouses, seed dressing, fumigation of grain and warehouses, preparation and application of baits, require a differentiated approach to precautionary measures. Safety use practices for pesticides developed by F.F. Erisman Federal Scientific Center of Hygiene in the past shall be revised to incorporate changes in formulations, techniques, and regulations. Objective. To substantiate hazard-specific safety requirements for various pesticide application techniques and equipment in the agricultural industry. Materials and methods. We analyzed regulatory documents and guidelines, results of our own long-term studies, and publicly available information on the safe use of pesticides in agriculture. Results. Based on our findings, we suggest measures for the safe use of pesticides complying with appropriate regulations for the processed crops and application rules and taking into account conditions of the equipment used. We also provide recommendations for prevention of acute pesticide poisoning for agricultural workers, farmers and users from the standpoint of occupational health. Conclusion. It is important to develop a profound document summarizing occupational safety and health requirements for all pesticide use practices.


1992 ◽  
Vol 63 (11) ◽  
pp. 883-889 ◽  
Author(s):  
C. Rosa Wen ◽  
Raul G. Caffesse ◽  
Edith C. Morrison ◽  
Carlos E. Nasjleti ◽  
Udayan K. Parikh

Sign in / Sign up

Export Citation Format

Share Document