scholarly journals Implications of Applied P-Sources with Calcium Super Phosphate, Phosphoric Acid and Rock Phosphate, and Phosphate Dissolving Bacteria on Snap Bean Grown Under Greenhouses Conditions

2021 ◽  
Vol 59 (2) ◽  
pp. 697-710
Author(s):  
M. H.M. Mohamed
Keyword(s):  
Phosphoric Acid ◽  
Rock Phosphate ◽  
Snap Bean ◽  
P Sources

scholarly journals Phosphorous Acid and Phosphoric Acid: When all P Sources are not Equal

EDIS ◽  
1969 ◽  
Vol 2005 (4) ◽  
Author(s):  
Asha M. Brunings ◽  
Lawrence E. Datnoff ◽  
Eric H. Simonne
Keyword(s):  
Phosphoric Acid ◽  
Nutritional Value ◽  
Fungicidal Activity ◽  
Phosphorous Acid ◽  
Cooperative Extension Service ◽  
Publication Date ◽  
University Of Florida ◽  
Phosphorus Containing ◽  
Actual Content ◽  
P Sources

While growers are familiar with phosphorus-containing fertilizer, the abundance of terms, apparently similar (such as phosphoric acid and phosphorous acid), may create some confusion on the actual content and efficacy of these products. Some common phosphorus-containing compounds are listed in Table 1. Some claims found in commercial literature and product descriptions refer to phosphorous acid as a “supplemental fertilizer,” while others present it as a fungicide (Table 2). The purpose of this article is to explain what phosphorous acid is and to examine both the fungicidal activity and nutritional value of phosphorous acid. This document is HS1010, one of a series of the Horticultural Sciences Department, Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida. Publication date: April 2005. HS1010/HS254: Are Phosphorous and Phosphoric Acids Equal Phosphorous Sources for Plant Growth? (ufl.edu)

scholarly journals Effects of Phosphorous and Phosphoric Acids on Growth and Phosphorus Concentrations in Container-grown Tropical Ornamental Plants

2006 ◽  
Vol 16 (1) ◽  
pp. 105-108 ◽  
Author(s):  
Timothy K. Broschat
Keyword(s):  
Phosphoric Acid ◽  
Ornamental Plants ◽  
Foliar Spray ◽  
Phosphorous Acid ◽  
Nutrient Content ◽  
Potassium Sulfate ◽  
Coated Urea ◽  
Synergistic Response ◽  
Chinese Hibiscus ◽  
P Sources

Chinese hibiscus (Hibiscus rosa-chinensis), shooting star (Pseuderanthemum laxiflorum), downy jasmine (Jasminum multiflorum), areca palm (Dypsis lutescens), and `Jetty' spathiphyllum (Spathiphyllum) were grown in containers using Osmocote Plus 15-9-12 (15N-3.9P-10K), which provided phosphorus (two experiments), or resin-coated urea plus sulfur-coated potassium sulfate, which provided no phosphorus (one experiment). Plants were treated with water drenches (controls), drenches with metalaxyl fungicide only, drenches with phosphoric acid (PO4-P), drenches with metalaxyl plus phosphorus from phosphoric acid, drenches with PhytoFos 4-28-10 [4N-12.2P-8.3K, a fertilizer containing phosphorous acid (PO3-P), a known fungicidal compound], or a foliar spray with PhytoFos 4-28-10. Plants receiving soil drenches with equivalent amounts of P from PhytoFos 4-28-10, PO4-P, or PO4-P+metalaxyl generally had the greatest shoot and root dry weights and foliar PO4-P concentrations. There were no differences between the control and metalaxyl-treated plants, indicating that root rot diseases were not a factor. Therefore, responses from PhytoFos 4-28-10 were believed to be due to its nutrient content, rather than its fungicidal properties. Foliar-applied PhytoFos 4-29-10 produced plants that were generally similar in size to control plants or those receiving metalaxyl only drenches. Fertilizers containing PO3-P appear to be about as effective as PO4-P sources when applied to the soil, but are relatively ineffective as a P source when applied as a foliar spray. A distinct positive synergistic response for shoot and root dry weights and foliar PO4-P concentrations was observed for the PO4-P+metalaxyl treatment when no P was applied except as a treatment.

scholarly journals Influence of Elemental Sulphur, Oxalic Acid, and Phosphoric Acid as Acidulating Agents on Phosphorous Dissolution from Rock Phosphate

2019 ◽  
pp. 1-8
Author(s):  
Fidelis W. Githua ◽  
Winnie Ntinyari ◽  
Nicholas K. Korir ◽  
Joseph P. Gweyi-Onyango
Keyword(s):  
Oxalic Acid ◽  
Phosphoric Acid ◽  
Dissolution Rate ◽  
Rock Phosphate ◽  
Farming Systems ◽  
Bare Soil ◽  
Crop Productivity ◽  
Elemental Sulphur ◽  
Small Scale ◽  
Randomized Design

Phosphorous is a limiting mineral element in crop productivity due to its less availability and fixed form in the soil. Due to its agricultural benefit, most farmers seek for alternative method to supply phosphorous in sufficient amount in the farming systems. Although the soluble P is relatively expensive for the peasant farmers, rock phosphate has proved to be quite efficient due to availability among the small scale holders. However, rock phosphate is faced with insolubility challenges hence is not readily available in the soils to promote crop growth.  Therefore, this study sought to establish the influence of various acidulating agents in dissolution of phosphorus in to rock phosphate. The study was carried out in a laboratory environment in Completely Randomized Design consisting of the following treatment: control (bare soil); Mijingu Rock Phosphte (MRP) and soil; MRP, soil and oxalic acid; MRP, soil and phosphoric acid; phosphoric acid and soil; MRP, soil and elemental sulphur and replicated three times. The incubation period was 90 days and the phosphorous dissolution rate was measured at interval of 30 days. The result revealed that the treatments had significant (P≤0.05) influence on the dissolution of the phosphorus from both rock phosphate and soil. Elemental sulphur was superior in increasing the rate of phosphorus dissolution form rock phosphate.  At 30 days, elemental sulphur had elicited release of a total of 37.5 ppm phosphorus while the control had the least, recording 5.37 ppm. A similar trend was observed in both 60 and 90 days. Regression analysis also exhibited positive relationship between the acidulating agents and the phosphorous dissolution rate from the rock phosphate. Therefore, elemental sulphur can be recommended to be used by in agricultural fields to enhanced solubilisation of rock phosphate and enhance supply of phosphorous.

scholarly journals Phosphorus Forms for Cranberry Production

HortScience ◽  
1995 ◽  
Vol 30 (4) ◽  
pp. 784F-784
Author(s):  
Carolyn DeMoranville
Keyword(s):  
Rock Phosphate ◽  
Field Studies ◽  
Potassium Sulfate ◽  
Fruit Rot ◽  
Bone Meal ◽  
Phosphorus Forms ◽  
Triple Super Phosphate ◽  
Field Plots ◽  
Iron And Calcium ◽  
P Sources

Commercial cranberry (Vaccinium macrocarpon Ait.) soils are high in iron and calcium and have low pH. This soil chemistry causes conditions where phosphorus is tightly bound and is, to a large extent, unavailable to the cranberry plants. In theory, P forms that directly enter the plant (foliar), or that do not quickly dissolve to become rapidly immobilized (organic, slow-release, other insoluble forms) could be more efficient for cranberry production. To test this hypothesis, two separate sets of field plots, one comparing 19 kg P/ha from sole P sources (all received 22 kg·ha–1 each N and K2O as ammonium sulfate and potassium sulfate) and the other comparing “complete” N–P–K fertilizers containing P, were established at six locations on three cranberry cultivars. Experiment #1 showed that, over all locations, there were no differences in mean yield for plots fertilized with triple super phosphate (current practice), foliar, or rock phosphate. However, fruit rot levels differed by treatment. In Experiment #2, organic forms (except bone meal) gave the lowest yields, while rock phosphate plots had the greatest yields. These field studies indicated that, while some organic P sources may not be suitable for cranberry production, low-leaching P forms such as bone meal and rock phosphate were as effective for cranberry production as the more-soluble triple super phosphate.

scholarly journals Response ofSorghum(Sorghum bicolorL.) to Residual Phosphate in Soybean-Sorghumand Maize-SorghumCrop Rotation Schemes on Two Contrasting Nigerian Alfisols

2016 ◽  
Vol 2016 ◽  
pp. 1-9
Author(s):  
Abdulmajeed Hamza ◽  
Ezekiel Akinkunmi Akinrinde
Keyword(s):  
Crop Rotation ◽  
Rock Phosphate ◽  
Randomized Design ◽  
Rotation Scheme ◽  
Dry Biomass ◽  
Single Super Phosphate ◽  
Completely Randomized Design ◽  
Rotation Crop ◽  
Screen House ◽  
P Sources

The effectiveness of finely ground Sokoto Rock Phosphate and Morocco Rock Phosphate to enhance productivity of maize- (Zea maysL.)Sorghum(Sorghum bicolor) and soybean- (Glycine maxL.)Sorghumcrop rotation schemes was evaluated using Single Super Phosphate as reference fertilizer. The experiments were carried out in the screen house of the Department of Agronomy, University of Ibadan, in February and June 2013. The experiments involved 2 × 2 × 4 × 3 factorial in a Completely Randomized Design. In the first and second croppings, the slightly acidic loamy sand still produced higher biomass than the strongly acidic sandy clay loam. On average, MRP was more efficient than SSP for maize dry biomass but, for soybean dry biomass, MRP was less efficient than SSP in the two soils. Sokoto Rock Phosphate was less efficient in the two location soils compared to SSP for the test crops. There was no difference in performance of P-sources in the second cropping. Soybean-Sorghumcrop rotation scheme produced greaterSorghumbiomass than maize-Sorghumcrop rotation scheme. It is evident that pH and clay contents of soils as well as the rotation crop concerned influence the efficiency of finely ground soluble phosphates in crop rotation schemes.

scholarly journals The possible use of scarce soluble materials as a source of phosphorus in Vicia faba L. grown in calcareous soils

2021 ◽  
Vol 117 (3) ◽  
pp. 1
Author(s):  
Abd-Elmonem Mohamed ELGALA ◽  
Shaimaa Hassan ABD-ELRAHMAN
Keyword(s):  
Citric Acid ◽  
Plant Growth ◽  
Vicia Faba ◽  
Rock Phosphate ◽  
Calcareous Soils ◽  
P Uptake ◽  
P Availability ◽  
High Concentrations ◽  
Different Sources ◽  
P Sources

<p><span lang="EN-US">Phosphorus (P) is affected by many factors that minimize its solubility especially in calcareous soils. The aim of this work was to conduct laboratory and greenhouse experiments to study the effect of using P solubilizing substances, </span><em><span lang="EN-US">i.e., </span></em><span lang="EN-US">compost, humic acid (HA), citric acid and ethylene di-amine tetra acetic acid (EDTA), and rhizobacteria, </span><em><span lang="EN-US">Bacillus megaterium</span></em><span lang="EN-US"> var. </span><em><span lang="EN-US">phosphaticum</span></em><span lang="EN-US"> on solubilizing P from different sources, ordinary superphosphate (OSP), rock phosphate (RP) and basic slag (BS). The effect of these treatments on the P- availability in El-Nubaria calcareous soil and P- uptake by faba bean (</span><em><span lang="EN-US">Vicia faba </span></em><span lang="EN-US">‘</span><span lang="EN-US">Giza 843</span><span lang="EN-US">’</span><span lang="EN-US">) were studied. Obtained results showed that the solubility of P sources differs in their ability to release soluble P in the following order: OSP &gt; RP &gt; BS. The following descending order was appeared of available P in soil with addition of solubilizing agents: citric acid &gt; EDTA &gt; HA &gt; compost for these sources of P, for both experiments. Regarding the interaction between solubilizing agents, the treatments of HA combined with EDTA or citric acid were superior in giving high concentrations in soil, and vigor plant growth. In addition, the solubility of P increased by about 5-6 times for all sources in the presence of P- dissolving bacteria. It seemed that the presence of appreciable amounts of Mg, S, Fe, Mn, B and other elements in BS played a role in enhancing plant growth and increasing yield, especially in the presence of added bacteria. BS could be used in calcareous soils and for soils characterized by low nutrient supply as sandy.</span></p>

Use of Radiophosphorus Kinetics in the Blood of Sheep to Compare Four Sources of Supplementary Phosphorus

1994 ◽  
Vol 1994 ◽  
pp. 226-226
Author(s):  
A.L. Abdalla ◽  
D.M.S.S. Vitti
Keyword(s):  
Rock Phosphate ◽  
Dicalcium Phosphate ◽  
Triple Superphosphate ◽  
Monoammonium Phosphate ◽  
Phosphorus Sources ◽  
Mineral Mixtures ◽  
Kinetics Of ◽  
P Sources

Dicalcium phosphate accounts for 70% of the total costs of mineral mixtures in Brazil and studies have been made of the use of alternative supplementary phosphorus sources for ruminants (SILVA FILHO et al, 1992). The aim of this work was to evaluate monoammonium phosphate (MAP), triple superphosphate (TSP) and Tapira rock phosphate (TRP) as alternative P sources to the expensive dicalcium phosphate (DCP) by studying the kinetics of radiophosphorus (32P) in the blood of sheep given such supplements.

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