Effect Of Rock Phosphate Research Articles

Effect of rock phosphate and bacteria solubilizing nutrients soil application on yield and fruit quality of olive trees cv. “Picual” under the arid zones

This study was carried out throughout two seasons and Located in a private olive grove on Cairo-Ismailia Desert Road in Egypt. The aim of this experiment was to use different amounts of rock phosphate (1, 2 or 3 kg/tree) with different time of additions (2 or 3 times) for phosphorous and sulfur release bacteria to form 6 treatments beside the control (untreated trees) on the mineral contents of the leaves, the vegetative growth, the yield, and the quality of the fruit of Picual olive trees planted in sandy soil and watered with drip irrigation for two seasons. The outcomes demonstrated that application of 2 or 3 kg rock phosphate per tree for two or three times of phosphorus and sulfur release bacteria gave the highest yield and improves fruit quality. Generally, the treatment of 2 kg rock phosphate for three times of P and S release bacteria is recommended due to its clear effect among all treatments on the abovementioned parameters.

In Transition towards Organic Farming: Effects of Rock Phosphate, Coral Lime, and Green Manure on Soil Fertility of an Acid Oxisol and the Growth of Soybean (Glycine max L. Merr.) Seedlings

Maintaining soil fertility and obtaining good crop yields in highly weathered tropical soils through organic practices–without chemical/synthetic inputs—requires a scientific approach and skillful managements, especially for phosphorus (P) nutrient. Our objective was to find a combination of lime and rock phosphate additions that made soil pH low enough so that rock phosphate would be adequately soluble, yet high enough so soil acidity is not harmful to most crops. Thus, a controlled (greenhouse) experiment was conducted to quantify soil properties, and soybean (Glycine max cv. Kahala) growth when rock phosphate, coral lime, and cowpea (Vigna unguiculata) green manure were applied as organic amendments to an acid, nutrient poor Oxisol of Hawaii. The treatments were a factorial combination of 3 application rates (0, 1, 2 g/kg) of coral lime (86% CaCO3 equivalent) from Western Samoa, 3 rates (0, 75, 150 mg/kg total P) of rock phosphate (10.6% total P, and 3.7% citrate extractable P) from central Florida, and 3 rates (0, 5, 10 g/kg) of a local cowpea green manure (2.7% N, 2.8% K). Each treatment was replicated 3 times, yielding a total of 81 pots of 2 kg soil each. Soybean seedlings were grown as a test crop. Our results showed that a combination of 1 g/kg (2 tons/ha) of lime and 75 mg/kg (150 kg P/ha) of rock phosphate provided enough P for soybean growth and simultaneously alleviated soil acidity problems (the green manure was to supply adequate N and K to the crop). Corresponding soil parameters were: soil pH = 5.2, exchangeable (KCl-extractable) Al = 3.6 mg/kg, Olsen (NaHCO3- extractable) P = 11 mg/kg, and soil-solution P of 0.05 mg/L. Our results lent support to the sustainable potential of organic farming.

Pengaruh Pupuk Rock Phosphate dan Pupuk Dolomit Terhadap Produksi Kelapa Sawit (Elaeis guineensis Jacq.) di Divisi I PT. Dwi Mitra Adiusaha

Oil palm in the process of development is grown in low or marginal nutrients and has a moderate acidity level. In the development process, oil palm requires high enough nutrients for the process of spurring the production process in order to get the expected results, therefore fertilization is carried out optimally with doses according to the recommendations that have been set so that the plants can meet the required nutrients. To increase the yield of fertilization, using rock phosphate and dolomite is very appropriate to get the nutrients needed and can improve the quality of oil palm fruit and the quantity of fresh fruit bunches of oil palm. The effect of Rock Phosphate and Dolomite fertilizers on the production of oil palm (Elaeis Guineensis Jacq) was carried out in the oil palm plantation of PT. Dwi Mitra Adhiusaha which is located in Natai Baru Village, North Mentaya Hilir District, East Kotawaringin Regency, Central Kalimantan. This activity was carried out by analyzing secondary data for both Rock Phosphate fertilizers from 2016 to 2020 and secondary production data from 2017 to 2021. This data analysis used the SPSS method and multiple linear regression which showed that fertilization had a positive correlation and regression towards achievement of oil palm fresh fruit bunches production at PT. Dwi Mitra Adiusaha.

Influence of Biochar, Rock Phosphate, and Urea Nitrogen Fertilizer on Growth and Yield of Cucumber (Cucumis sativus) Grown in Standoff, Southern Alberta Greenhouse

Two trials were performed in greenhouse Standoff, Southern Alberta to investigate urea, rock phosphate, and biochar soil amendment on cucumber crops. The objective of the study was to confirm the effectiveness of rock phosphate and biochar with urea on greenhouse cucumber production. Two experiments were conducted in the Summer of 2020 and 2021 cropping seasons. The treatments applied in 2020 were the varying application of rock phosphate at 0 for control, 50 kg P ha-1 and 100 kg P ha-1 for phosphorus, and urea at 60 kg N ha-1 and 90 kg N ha-1 for nitrogen with their combinations N60 + P50, N90 + P100. In the 2021 cropping season, treatments applied were varying levels of Biochar (C) applied at a rate of 25 kg ha-1 (LC), 50 kg ha-1 (MC), and 100 kg ha-1 HC for Low, Medium, and High level, respectively, Urea (N) was applied at 30 kg N ha-1 and 60 kg N ha-1 (Low N and High N level, respectively) while rock phosphate (P) was applied at 25 kg P ha-1 and 50 kg P ha-1 (Low P and High P level, respectively) with their combinations. The seven treatments for each cropping season were replicated three times resulting in twenty-one experimental pots. The agronomical parameters data collected were subjected to one-way univariate analysis of variance using Duncan’s Multiple Range Test at 5% to separate the treatment means. The results of the experiment showed that High P and Low N treated pots influenced the growth of cucumber crop at 122 days after sowing (DAS) while High N, Low N, and Low N + Low P jointly favored the highest number of cucumbers on the vines than other treated pots at 82 DAS during the 2020 cropping season. However, all the treatments supported cucumber vine length except control and High P at 96 DAS while Low P + MC, High P, and High N+ P produced more fruits than control, High N and Low N + P + HC treatments at 96 DAS during the 2021 cropping season. It was observed that the addition of biochar in the 2021 cropping season influenced the growth and yield of cucumber when compared performance of cucumber crops in two growing seasons. This experiment advocates the use of biochar soil amendment in cucumber production.

Effect of rock phosphate and plant growth-promoting rhizobacteria on physical and chemical properties change of corn residues during composting

This study aims to study the effect of adding rock phosphate and plant growth-promoting rhizobacteria (PGPR), in the physical and chemical properties of the corn residues compost during aerobic decomposition. Four composting heaps were included in this study as it follows, 1) traditional method composting heap (T1), 2) heap was supplied with rock phosphate (T2), 3) heap was supplied with rock phosphate + Bacillus megatherum culture (T3), and 4) heap was supplied with rock phosphate+(Bacillus.megatherum, Azospirillum lipoferum, Azotobacter chroococcum) mixed cultures (T4). All compost treatments showed an increase in temperature right after composting started. The heap treated with three bacterial inoculums (T4) reached the highest peak values of 62.2°C on day 12 compared to other treatments. At the end of the composting period T1 recorded the lowest value of bulk density (533 kg/m3) compared to other treatments. The pH value declined to stabilize with the end result at 100 days being 6.9, 7.4, 7.1 and 7.0 for composting treatment T1, T2, T3 and T4, respectively. The initial C/N ratio was 61:1 for all composting treatments, and the final values of total C/N ratio after the 100 days were 15:1, 14:1, 12:1 and 10:1 for composting treatments T1, T2, T3 and T4 respectively. Compost supplied with rock phosphate and three bacterial inoculums (T4) reached has more N, P and K content compared to other composting treatments T1, T2, T3. These results indicated that adding rock phosphate and (PGPR) to corn residues during composting improve nutritional value of the resulting compost.

Combined effect of rock phosphate with single super phosphate on yield and phosphorus use efficiency under maize-groundnut cropping sequence in Alfisols of Odisha

Aim: The present study was conducted to investigate the effect of combined application of rock phosphate with water soluble phosphorus fertilizers on its efficiency in relation to soil and crop production. Methodology: Rock phosphate and single super phosphate were used as supplemental source of phosphorus and applied in variable combinations at graded doses, with maize and groundnut as test crop. Lime was applied in combination with 100% SSP to analyse its effect. The composite surface (0-15 cm) soil samples were collected at critical growth stages of maize and groundnut and further analyzed for different physical and physico-chemical characteristics. The plant samples were collected from each treatment at harvest stage for nutrient analyses. Results: Application of rock Phosphate increased the available phosphorus in soil. The combined treatment significantly influenced the yield attributes and nutrient uptake of both maize and groundnut crops. Among the combination, equal proportion of soluble single super phosphate and insoluble rock phosphate source of P outreached the other combination ratios. The highest agronomic phosphorus use efficiency and relative agronomic efficiency of the cropping sequence was obtained with the combined treatment of Single super phosphate along with lime. Interpretation: Combination of rock phosphate which has been reported to be farmer’s pocket friendly along with single super phosphate under acid soil conditions holds the potential to produce better results as compared to use of lone conventional water soluble phosphatic fertilizer like single super phosphate.

Effect of rock phosphate, PSB and FYM on P concentration and dry matter yield of soybean (Glycine max)

A pot experiment was conducted in order to study the influence of different combinations of rock phosphate (RP), FYM and phosphate solubilizing bacteria (PSB) on phosphorus concentration and dry matter yield of soybean variety MACS-1460 grown in an acid soil of Manipur. Result revealed that plant P concentration and dry matter yield of soybean were affected significantly by the application of SSP, rock phosphate, FYM and PSB either singly or in combination. Fertilization of rock phosphate in presence or absence of PSB and FYM significantly increased P concentration and dry matter yield of soybean over control at different stages of crop growth. Comparatively higher P concentration and dry matter yield of soybean was recorded in soil treated with T11 (100% RD of P2O5 from RP + PSB2 + FYM at 5t ha-1) which is at par with T10 (100% RD of P2O5 from RP + PSB1 + FYM at 5t ha-1) at the time of harvest. Agronomic efficiency of rock phosphate as P source for crop production is enhanced by the solubility effect of FYM and PSB application. Application of PSB and FYM in combination enhanced organic P mineralization thereby increasing soil P availability, plant P concentration, growth and dry matter yield of soybean.

Effect of rock phosphate enriched different organic manures and chemical fertilizers on growth and yield of wheat

A field experiment was conducted during the rabi season of 2018–19 on loamy sand soils of Centre for Research on IFS, Sardarkrushinagar Dantiwada Agricultural University, Sardarkrushinagar, Gujarat to assess the effect of rock phosphate enriched different organic manures on growth and yield of wheat. The results indicated that the 60 kg P2O5 application through diammonium phosphate resulted in highest yield (5103 kg), number of tillers per meter row length (92.42), number of effective tillers per meter row length (77.42), spike length (8.22 cm) and number of grains per plant (53.13) than rest of the treatments of PROMs. Eventhrough vegetable waste and vermicompost incubated media also resulted in higher number of tillers, effective tillers, number of spike per meter row length and number of grains per ear over the control.

Enhancement Effect of Water-Soluble Phosphorus on Agronomic Effectiveness of Phosphate Rocks

ABSTRACTDirect application of phosphate rocks (PRs) with low/medium in reactivity has shown to be low in agronomic effectiveness for cereal crops. Presence of water-soluble P (WSP) in the vicinity of PR can significantly enhance the rooting system at the early stage of plant growth. This, in turn, can enable the plant to utilize the associated PR more effectively than the use of PR alone at planting. This report presents the results of several greenhouse experiments that show the granulated (WSP+PR) products by dry compaction process using different low-reactive PR sources were as effective as WSP fertilizers viz triple superphosphate (TSP) and monoammonium phosphate (MAP). The test plants were maize (30 days) and soybean and upland rice were grown to maturity on acid or neutral soils. Based on the results obtained a P ratio of 50:50 between WSP and PR is recommended for the granulated (WSP+PR) products that can achieve crop yields at the same levels as that with the WSP fertilizers.Abbreviations: phosphate rock, PR; water-soluble P, WSP; dry-matter yield, DMY

Response of rice and bacterial community to phosphorus-containing materials in soil-plant ecosystem of rare earth mining area

The effects of phosphate rock (PR), bone charcoal (BC), single superphosphate (SSP) and calcium magnesium phosphate (CMP) on rice growth and bacterial community structure in mining area of heavy and light rare earth elements(REEs) were studied by pot experiment, field experiments were conducted with CMP and BC as restorative materials. The pot experiment showed that BC, SSP and CMP improved dry weight of rice (especially grains) in two places by 84.23%, 116.97%, 81.83%, 1630.77%, 1817.95% and 902.56% respectively; and reduced REE content of rice (especially roots) in two places by 28.19%, 81.67%, 90.58%, 67.87%, 81.72% and 94.81%; PR had little effect on dry weight and REE content of rice in both places, but reduces Bacillusabundance in both places, while BC significantly improved the abundance of Perlucidibaca and Bacillus; CMP had little effect on bacterial community, two-year field experiments showed that dry weight of rice grain treated with BC was 100% and 43.0% higher than that treated with CK and CMP, and the content of REEs was 91.8% and 16.8% lower than that with CK and CMP. The results of pot and field experiments both show BC is the most potential material for restoring soil-plant ecosystem in REE mining area.

Residual Effect of Rock Phosphate, Farmyard Manure and Effective Microorganisms on Nutrient Uptake and Yield of Wheat

Residual Effect of Rock Phosphate, Farmyard Manure and Effective Microorganisms on Nutrient Uptake and Yield of Wheat

Effect of Rock Phosphate along with Organic Manures on Soil Properties, Yield and Nutrient Uptake by Wheat and Chickpea

Two separate field experiments were conducted at Post Graduate Institute, Mahatma Phule Agricultural University, Rahuri, Maharashtra on wheat and chickpea crops to test the effect of rock phosphate (RP) along with organic manures on an Inceptisols (Vertic Haplustepts) with ten treatments viz. absolute control, P control (recommended dose of N and K excluding P), recommended dose of N and K along with RP, RP+ phosphorus solubilizing bacteria (PSB), RP+pressmud cake+PSB, RP+FYM+PSB, RP+vermicompost + PSB, RP+fresh cow dung+PSB, RP+post biomethanated spentwash+PSB and single superphosphate (SSP). The incubation of RP in organic manures and PSB proved better for increasing the availability of major nutrients for both crops. Availability of P at 90 days after sowing and at harvest was significantly increased by incorporation of RP incubated with fresh cow dung and PSB. The nutrient uptake by both crops was also increased due to the application of RP with organic manures and PSB. This improvement in availability of nutrients ultimately resulted in significant increase in yield of both the crops over absolute control, P control and RP treatments. Among the organic manure treatments the availability of N and P and yield of both crops was highest in RP+fresh cow dung+PSB treatment.

Effect of phosphate rock on the solubility of heavy metals in soils saturated with industrial wastewater

Irshad, M., Khan, R. U., Jadoon, S., Hassan, A. and Egrinya Eneji, A. 2014. Effect of phosphate rock on the solubility of heavy metals in soils saturated with industrial wastewater. Can. J. Soil Sci. 94: 543–549. An in situ technology for immobilizing metals in polluted soils could be a more effective approach to managing their toxicity to the environment, especially plants. The aim of this study was to investigate the effect of milled phosphate rock (PR) on the sorption of Ni, Cd and Cu ions in differently textured soils polluted with industrial wastewater. For this purpose, soils were mixed with two particle size fractions (0.2 mm and 1 mm) of PR material. Each material was applied at the rate of 0, 2.5 and 5%. Results showed that PR amendment reduced the solubilization of heavy metals in the order sandy clay loam>sandy loam>loamy sand. Metal concentrations in soils saturated with industrial wastewater were in the order Ni>Cd>Cu. Solubilization of metal ions in soils also reduced with the increase in the amount of rock phosphate added. This occurred more with the finer PR fraction. The concentrations of heavy metals in soils varied directly with their respective concentrations in the wastewater. Saturating soil with wastewater for a longer time increased the solubility of heavy metals. The adsorptive capacity of heavy metals from the respective aqueous solution also increased with increasing shaking time. The finer PR particles better enhanced the sorption capacity of heavy metals. This study indicated that the retention of heavy metals by PR mineral in contaminated soils may reduce the contamination risk in surface and subsurface waters.

Root and shoot growth of soybean (Glycine max) as influenced by naturally available phosphorus nutrition with manure

Effect of rock phosphate (RP) combined with cattle manure (CM) on plant growth of soybean was studied. As basal fertilizer application, RP at different levels (0, 25, 50, 75 and 100 kg/ha) along with 10 tons/ha CM (T2-T6) were applied and also recommended chemical fertilizer (T1 as a control). The results revealed that seed-pod ratio ranged from 0.68 to 0.74 at the maturity stage (12 weeks) and the highest ratio (0.74) was reported in RP (50 kg/ha) with CM (T4) and lowest value (0.68) was observed when CM solely applied. Further, the plants grown in inorganic fertilizer had a high root-shoot ratio (1:17) while comparatively lower ratios (1:12 to 1:15) were noted in plants grown with RP (0-100 kg/ha) and CM. Application of CM alone or in combination with RP at the optimal level could improve root and shoot growth for better yield of the soybean with less environmental pollution.

Effects of Phosphate Rock on Absorption and Accumulation of Heavy Metals of Ryegrass in Heavy Metal Contaminated Soil

The effects of phosphates rock (PR) with different particle sizes {D97<4.26 (the diameters of 97% of the particles are less than 4.26 µm.), <36.83, <71.12 and <101.43 µm} and different concentration (2.5% and 5% content of try soil weight) on immobilizing heavy metal-contaminated soils by a perennial ryegrass greenhouse experiment are conducted. Results indicate that remediation effect of applying 5% content is more significant than 2.5%. Ryegrass biomass in shoots in the former applying content is much larger than the latter and for both roots and shoots, PR reduces the absorption and accumulation of Pb, Cu and Zn, but no significant influence on Cd. While adding the same amount of different sizes of PR doesn’t show significant differences between these treatments. Pb content at 5% level of the finest size of PR is the minimum, decreased by 33% and 56% compared to the control in roots and shoots respectively, which was also suitable for Zn, decreased by 12.65% and 39.61% respectively.

Effects of Phosphate Rock on Phosphorus Availability for Vegetable Crops in Cropping Sequence

This study was conducted to investigate the effects of cropping sequence and Minjingu Phosphate Rock (MPR) on soil phosphorus (P) availability and yield of selected vegetable crops. The study involved a researcher managed on farm field experiment conducted in Mbeya, Tanzania using a split plot design with three replications. Crop sequence (i) Cabbage tomato maize (ii) Maize tomato -cabbage (iii) Cabbage cabbage maize (iv) Maize tomato – maize, constituted the main plots. The P sources (i) control (no fertilizer), (ii) MPR, (iii) compost + MPR, (iv) crotalaria green manure + MPR (v) NPK (standard), were sub plots. The experiment was repeated three times on the same plots. In the fourth season, bean was planted in all plots without fertilizer to capture residual nutrients. Results indicated more percent increase in soil available P in plots where cabbage was included in the sequence (207.9%) as compared to when it was ommited (85.39%). Compost + MPR treatment significantly increased soil pH from 5.8 to 6.33 while in NPK treated plots it decreased to 5.49. After three seasons there was higher residual P in MPR treated plots (33.33 mg/kg) as compared with NPK (27.65mg/kg). Plots treated with NPK produced the highest maize yield while plots treated with MPR alone or combined with compost or crotalaria produced significantly (P ≤ .01) higher cabbage and Original Research Article Minja et al.; IJPSS, Article no. IJPSS.2014.001 435 tomato yield especially during the first and second seasons. Bean pod yield was higher in MPR treated plots. Therefore, the use of PR and including cabbage in crop rotations should be encouraged in organic vegetable farming systems to restore P on phosphorus deficient soils.

Effect of phosphate rock on denitrification in a nitrate-polluted groundwater remediation system

This study was conducted to evaluate the performance of phosphate rock for the promotion of denitrification in groundwater remediation. The results showed that phosphate rock can release phosphorus in the leaching experiment and thus has potential to provide phosphorus for denitrifying bacteria growth. In column experiments, the nitrate removal efficiency of columns containing 1,500 and 750 g of phosphate rock was over 97% at 20 ± 2°C, and the nitrite concentrations were lower than 0.5 mg NO2-N/L. However, the nitrate removal efficiency in columns containing 500 and 0 g of phosphate rock was lower than 90%, and nitrite accumulation was observed. Additionally, the nitrate concentration in effluent increased evidently when the influent flow rate was increased from 2.6 to 3.6 mL/min. Nevertheless, nitrate removal efficiency of columns containing 1,500 and 750 g of phosphate rock was higher than that of columns containing 500 and 0 g of phosphate rock. These findings indicated that phosphate rock was applicable as a phosphorus source for nitrate-polluted groundwater remediation.

Effect of Rock Phosphate on Zn and Fe Bioavailability and Accumulation bySalix smithianain Heavily Contaminated Soil

High biomass production Salix smithiana was proved as the plant able to accumulate substantial amount of Cd and Zn in aboveground biomass. Nevertheless, in heavily contaminated soils (mainly by Zn) willows can suffer from chlorosis because of Fe deficiency induced by excess of Zn amount. Method such as chemophytostabilization seems like very good measure for planting willows in such heavily contaminated soil. In our experiments we evaluated effect of rock phosphate on changes in Zn and Fe bioavailability and accumulation of these elements by willows together with the willows growth on heavily contaminated soil. Addition of rock phosphate reduced plant-available Zn concentrations in soils resulting in significant decrease of Zn content in leaves. In the case of Fe, however, its contents in the leaves significantly decreased as well, although the mobile portion of Fe in soil remained unchanged. Yield of aboveground biomass in rock phosphate treatment was not significantly different in comparison to the control. After the first vegetation period, we can conclude that reduction of Zn contents in willows after rock phosphate application did not lead to suppress of Fe deficiency and improvement of willow growth in heavily contaminated soil.

Effect of Rock Phosphate on Nutrient Status and Nut Load of Mature Coconut in South-Western Ghana

The effect of rock phosphate on mature coconut was evaluated from 2004 to 2010 within the context of low nut yield due to phosphorus deficiency in the acidic soils of South-Western Ghana. A low reactive Togo rock phosphate containing 25.5% P205 was applied. Three application schedules based on 666 kg/ha rock phosphate and a control were evaluated in a Randomized Complete Block Design with five replications. The application schedules were: (a) Bulk application at 4.5 kg/tree (b) Two-equal-split application at 2.25 kg/tree in years 1and 3 (c) Three-equal-split application at 1.5 kg/ tree in years 1, 2 and 3. Muriate of potash fertilizer was applied at 2 kg/tree as basal treatment. Plot size was 0.2 ha comprising 30 trees. Nut load and leaf nutrient status of coconut palms were determined. Rock phosphate led to a significant (P<0.01) increase in leaf phosphorus and nut yield. It sustained a superior nut load for a 4-year period beginning from year 2 of application to year 5 with average nut gain of 19.0 per tree compared to 4.6 per tree in the control palms. There was no significant (P>0.05) difference in nut yield and nutrient status between bulk and split methods of rock phosphate application. A value-to-cost ratio of 1.5 was obtained thus indicating the profitability of rock phosphate application in the acidic soils of South-Western Ghana. Coir geotextiles find application in revegetation of slopes by stabilizing the soil through erosion control. It has been found that the longevity of coir geotextiles although highest among all the natural fibres, it is required to last for at least 5 years so as to sustain the vegetation on the slopes for a long term solution. Normally it is found that coir geotextiles lose their 50% strength in 6 months in contact with soil, therefore it is required to strengthen the coir geotextiles.

The Effect of Rock Phosphate on Soil Nutrient Dynamics, Growth, Development and Yield of Oil Palm in The Semi-Deciduous Forest Zone of Ghana

Field experiment was conducted at Oil Palm Research Institute, Kusi from 2002 to 2007 to as-sess the effect of Phosphate Rock (PR) on soil nutrient dynamics, growth, development and yield of oil palm. The study was carried out on the soils of Nzema series classified as Ferric Acrisols and Typic Hapludult. The oil palm trees selected were 8 year old tenera (DXP ex OPRI). Each plot measured 17.6 m x 17.6 m and had 6 palm trees. There were four treatments arranged in randomized complete block design with four replicates. The treatments included: 1). TSP - OPRI fertilizer recommendation - 222 kg of AS + 222 kg of TSP + 296 kg of MOP/ha/yr (control); 2). PR1 - PR 715 kg + 222 kg of AS + 296 kg of MOP/ha - Yr 1. PR 358 kg + 222 kg of AS + 296 kg of MOP/ ha – Yr 2. PR 358 kg + 222 kg of AS + 296 kg of MOP/ha – Yr 3; 3). PR2 - PR 1428 kg + 222 kg of AS + 296 kg of MOP/ha applied once in every 5 years; 4). PR3 - PR 142.85 kg/ha +222 kg AS/ ha + 296 kg of MOP/ha applied twice in every 5 years. Application of treatments influenced the soil chemical properties to a varying extent. Gradual increase in soil nutrient lev-els were more pronounced in RP treatments than Triple Super Phosphate (TSP) treatment (control). Soil pH increased from extremely acidic (3.73) to acidic (5.43) for treatment PR2. At the end of the study, available P recorded 9.55 mg/kg. The value is slightly below the medium range of available P for oil palm production. Significant increases were recorded by RP treat-ments for exchangeable Ca, Mg, K and ECEC. The results showed that treatment PR2 was effec-tive and gave the highest oil palm yield of 62.8t/ha with TSP recording 53.7t/ha. For sustained levels of soil nutrients, growth, development and yield of oil palm, PR incorporation should be encouraged.Keywords: Phosphate Rock, nutrient dynamics, oil palm, triple super phosphate