Academic literature on the topic 'Phosphatic fertilizers Testing'

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Journal articles on the topic "Phosphatic fertilizers Testing"

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Fauzan, M., Sofyan Husein Siregar, and Syafruddin Nasution. "EFFECT OF DIFFERENT TYPES OF FERTILIZER ON THE GROWTH OF MARINE PHYTOPLANKTON POPULATION Chlorella vulgaris." Asian Journal of Aquatic Sciences 4, no. 1 (April 7, 2021): 65–72. http://dx.doi.org/10.31258/ajoas.4.1.65-72.

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This research was conducted on October 13-26, 2019 in the Regional Technical Implementation Unit of the Seawater and Brackish Aquaculture Fisheries Office (UPTD BPBALP Teluk Buo), West Sumatra. This study aims to determine the effect of applying different types of fertilizers to the growth of Chlorella vulgaris microalgae populations on laboratory scale culture. The method used in this study was an experimental method in the laboratory using a completely randomized design (CRD) one factor, namely the difference in fertilizer types with 3 (three) replications. Fertilizers used are Walne fertili
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Boyhan, George E., Reid L. Torrance, Ronald H. Blackley, M. Jefferson Cook, and C. Randell Hill. "EVALUATION OF FERTILITY PRACTICES FOR VIDALIA ONIONS." HortScience 40, no. 3 (June 2005): 885e—886. http://dx.doi.org/10.21273/hortsci.40.3.885e.

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Fertilizer rates of N, P, K were evaluated over 4 years (2000–03) as were different sources of experimental and commercial fertilizers. The highest total yields and yields of jumbos (≥7.6 cm) occurred with nitrogen rates of 140–168 kg·ha–1. Neither phosphorus nor potassium rates had an affect on total yield. Phosphorus rates of 0-147 kg·ha–1 and potassium rates of 0–177 kg·ha–1 were evaluated. Increasing nitrogen fertilizer resulted in increasing leaf tissue nitrogen, but did not affect P, K, Ca, or S. Increasing phosphorus fertilizer increased leaf tissue phosphorus only slightly (p = 0.060)
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Bryla, David R., and Bernadine C. Strik. "Nutrient Requirements, Leaf Tissue Standards, and New Options for Fertigation of Northern Highbush Blueberry." HortTechnology 25, no. 4 (August 2015): 464–70. http://dx.doi.org/10.21273/horttech.25.4.464.

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Northern highbush blueberry (Vaccinium corymbosum) is well adapted to acidic soils with low nutrient availability, but often requires regular applications of nitrogen (N) and other nutrients for profitable production. Typically, nutrients accumulate in the plant tissues following the same pattern as dry matter and are lost or removed by leaf senescence, pruning, fruit harvest, and root turnover. Leaf tissue testing is a useful tool for monitoring nutrient requirements in northern highbush blueberry, and standards for analysis have been updated for Oregon. Until recently, most commercial planti
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Pauly, D. G., S. S. Malhi, and M. Nyborg. "Controlled-release P fertilizer concept evaluation using growth and P uptake of barley from three soils in greenhouse." Canadian Journal of Soil Science 82, no. 2 (May 1, 2002): 201–10. http://dx.doi.org/10.4141/s01-021.

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Use of controlled-release P fertilizers to match the fertilizer P availability to crop requirement has potential for improvement of P uptake and crop production. Greenhouse experiments were conducted to evaluate the concept of controlled-release P fertilizer by using different coatings to regulate the release of P and to compare the growth and P uptake of barley (Hordeum vulgare L.) in three Alberta soils. Testing of different coatings in one experiment was followed by further evaluation of the promising treatments in two experiments. Commercial monoammonium phosphate (MAP) and diammonium phos
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Rodrigues, Laís Maia, Ricardo Francisco Pires, and Davi Leonardo de Souza. "Study of Granulated Gypsum Hardness Coming from the Granulation Process in Rotating Disk." Materials Science Forum 899 (July 2017): 160–66. http://dx.doi.org/10.4028/www.scientific.net/msf.899.160.

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The granulation process is a unit operation with broad application in the fertilizer industry. The granular fertilizer has a better physical appearance, facility of agricultural application and elimination of fugitive dust in the production and bagging units. Phosphogypsum is a residue from the production of phosphate fertilizers. It known that for every 1 t of phosphate fertilizer produced, about 4 t of phosphogypsum are obtained, causing problems in storage and risks to the environment. Such problems may be minimized by granulating the waste phosphogypsum and using it in agriculture. This wo
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Mikkelsen, Robert L., and Thomas W. Bruulsema. "Fertilizer Use for Horticultural Crops in the U.S. during the 20th Century." HortTechnology 15, no. 1 (January 2005): 24–30. http://dx.doi.org/10.21273/horttech.15.1.0024.

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Tremendous changes have occurred during the past century in the sources and methods for supplying nutrients for horticultural crops. Reliance on animal manure, cover crops, and animal tankage was insufficient to meet the crop nutrient demand for a rapidly expanding population. The Haber-Bosch process for ammonia synthesis (1910s) revolutionized the availability and affordability of nitrogen (N) fertilizer. Discovery of large-scale deposits of rock phosphate in South Carolina (1860s) and Florida (1880s) alleviated widespread nutrient deficiencies. Acidification of rock phosphate and bone materi
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McKenzie, R. H., E. Bremer, L. Kryzanowski, A. B. Middleton, E. D. Solberg, D. Heaney, G. Coy, and J. Harapiak. "Yield benefit of phosphorus fertilizer for wheat, barley and canola in Alberta." Canadian Journal of Soil Science 83, no. 4 (August 1, 2003): 431–41. http://dx.doi.org/10.4141/s02-078.

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Crop responsiveness to P fertilizers on the Canadian Prairies has likely declined during the past three to four decades due to regular application of P fertilizer and reduced tillage. Its relationship to extractable soil P as determined by various soil tests may also have changed. The objective of this study was to evaluate five soil test P methods for three major crops across a wide range of soil types and environmental conditions. Small-plot P fertilizer trials were conducted at 154 locations across Alberta from 1991 through 1993. At each location, fertilizer responses were determined for on
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Pathak, Enish, Arjun Sanjyal, Chhatra Raj Regmi, Saroj Paudel, and Anima Shrestha. "Screening of Potential Plant Growth Promoting Properties of Bacillus Species Isolated from Different Regions of Nepal." Nepal Journal of Biotechnology 9, no. 1 (July 31, 2021): 79–84. http://dx.doi.org/10.3126/njb.v9i1.38672.

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The deleterious effects of intensive use of chemical fertilizers and pesticides in agriculture has led to the substantial research efforts on finding the alternatives to these agrochemicals. This study was aimed to isolate Bacillus species from soil of different regions of Nepal and screen for their ability to promote plant growth directly or indirectly by testing their ability to produce plant growth hormone indole acetic acid, hydrogen cyanide, ammonia and protease as well as phosphate solubilization. Thirty nine Bacillus strains were isolated from 25 soil samples of different regions of Kat
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Johnston, Adrian M., and F. Craig Stevenson. "Field pea response to seeding depth and P fertilization." Canadian Journal of Plant Science 81, no. 3 (July 1, 2001): 573–75. http://dx.doi.org/10.4141/p00-166.

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A study was conducted at Melfort, SK, in 1998 and 1999 to determine whether seeding depth and P fertilization affect field pea (Pisum sativum L.) seedling emergence and grain yield. Treatments included a factorial combination of three seeding depths (38 mm, 76 mm, and 114 mm) with and without 25 kg P2O5 ha–1 as monoammonium phosphate. While seedling density was not affected by seeding depth at 3 wk after planting, the deepest seeding depth produced significantly fewer seedlings than the two shallower depths at 5 wk post-seeding. A year-by-seeding-depth interaction was recorded for grain yield,
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Smagula, John M., and Scott Dunham. "Pruning Method Affects Lowbush Blueberry Yields." HortScience 30, no. 4 (July 1995): 784C—784. http://dx.doi.org/10.21273/hortsci.30.4.784c.

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Flail mowing was compared to traditional pruning by oil fire over a 12-year period in two fertility experiments testing interactions with pruning method. In study one (1983–1986), urea at 0, 22.4, 44.8, 67.2, or 89.6 kg·ha–1 was applied preemergent in a split-block design with fertility as the main effect, and pruning method split within six blocks. Study two (1987–1994) continued the pruning and application of fertilizer on the treatment plots with similar rates, but diammonium phosphate (DAP) replaced urea as the fertilizer. Leaf tissue N concentrations were above the 1.6% standard and urea
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Dissertations / Theses on the topic "Phosphatic fertilizers Testing"

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Fleming, Nigel Kevin. "Polyphosphates and microbial uptake of phosphorus : studies with soil and solution culture." Title page, contents and summary only, 1992. http://web4.library.adelaide.edu.au/theses/09A/09af598.pdf.

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HWU, MEEI-SHAN, and 胡美珊. "Rapid chemical testing method for evaluating fertilizer efficiency of rock phosphate and the transformation of rock phosphate in different soils." Thesis, 1992. http://ndltd.ncl.edu.tw/handle/18506364381525452549.

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Books on the topic "Phosphatic fertilizers Testing"

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May, Alexander. Assessment of Ra²²⁶ and toxic element distribution at Tennessee Valley Authority phosphate slag stockpiles, Muscle Shoals, AL. Washington, D.C: U.S. Dept. of the Interior, Bureau of Mines, 1990.

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May, Alexander. Assessment of Ra p226 s and toxic element distribution at Tennessee Valley Authority phosphate slag stockpiles, Muscle Shoals, AL. Washington, DC: Dept. of Interior, 1989.

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