Phosphate rock and phosphate rock/sulphur granules as phosphate fertilizers and their dissolution in soil

Rājan, S. S. S.

doi:10.1007/bf01049563

Cited by 31 publications

(9 citation statements)

References 20 publications

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“…producing sulphuric acid (Lipmann et al 1916, Kittams and Attoe 1965, Schofield et al 1981. Granulating RP with ES increased P availability (Rajan 1983(Rajan , 1987 resulting in the development of bio-superphosphate featuring high efficacy on acid tropical soils (Stamford et al 2003). The present study was conducted to assess the effect of combined ES and RP application on growth, yield and nutrient uptake of soybean (Glycine max (L.) grown under greenhouse conditions.…”

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confidence: 99%

Effect of combined fertilization with rock phosphate and elemental sulphur on yield and nutrient uptake of soybean

Brahim¹,

Niess²,

Pflipsen³

et al. 2017

PLANT SOIL ENVIRON

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Brahim S., Niess A., Pflipsen M., Neuhoff D., Scherer H. (2017): Effect of combined fertilization with rock phosphate and elemental sulphur on yield and nutrient uptake of soybean. Plant Soil Environ., 63: 89-95.Greenhouse pot experiments were carried out in 2013 and 2014 at the University of Bonn, Germany, to study the effect of combined fertilization of rock phosphate (RP) with elemental sulphur (ES) on growth, grain yield and nutrient uptake of soybean. Treatments included RP, ES, combined application (RPES), triple superphosphate (SP), magnesium sulphate (MgS), SP and magnesium sulphate (SPMgS) and an unfertilized control. Combined fertilization (RPES) resulted in a significant increase of soil-plant analysis development (SPAD) values, grain yield, yield components and nitrogen and in part phosphorus uptake of the shoot. Single application of RP or ES only tended to affect crop growth and nutrient uptake. Application of MgS and/or SP significantly increased grain yield in both years suggesting an effect of sulphate.Keywords: pot trials; organic farming; phosphorous deficiency; Glycine max 89 Plant Soil Environ. Vol. 63, 2017, No. 2: 89-95 doi: 10.17221/22/2017-PSE types and mixtures of P and sulphur (S) fertilizers arranged in a randomized complete block design with four replications. Treatments included elemental sulphur with 95% S, magnesium sulphate (MgS), fine-ground rock phosphate with 11.4% P, either alone or combined with fine ground ES with 95% S (RPES), triple superphosphate (SP = (Ca(H 2 PO 4 ) 2 × H 2 O), SPMgS and a zero-control (CON). Basal nutrient supply of all treatments is summarised in Table 1. Pots were set up on a turnable framework on drays allowing both regular randomization and exposition to outdoor air on hot and dry days. Soybeans (Glycine max L.) cv. Sultana were sown (2.5 cm depth) in April with a density of nine seeds per pot and later adjusted to three plants. In 2013 seeds were inoculated with a liquid solution of Bradyrhizobium japonicum (Radicin®), which proved to be ineffective with respect to nodulation. For that reason all soils in the pots received an additional dressing with ammonium nitrate (0.6 g N per pot) split over four dates between 61 and 98 days after sowing. In 2014, seeds were successfully inoculated using a dry product based on peat with 4 × 10 9 viable bacteria per gram (HiStick®).After planting the soil water content was adjusted to 50% of the maximum water holding capacity and later in the season to 65%. Soil water content was controlled daily to replenish water loss with deionized water. Plants were treated with Pyrethrins (Spruzit®) against pea thrips (Kakothrips pisivorus) and the two spotted spider mite (Tetranychus urticae).Data collection and assessments. The relative chlorophyll content (SPAD (soil-plant analysis development) value) of the three youngest, fully expanded leaves was weekly measured on each plant using a SPAD-Meter (SPAD-502, Konica Minolta, Osaka, Japan). The number of pods of all plants was counted shortly before harvest. A...

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Effect of combined fertilization with rock phosphate and elemental sulphur on yield and nutrient uptake of soybean

Brahim¹,

Niess²,

Pflipsen³

et al. 2017

PLANT SOIL ENVIRON

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“…While the effectiveness of RPR/So blends may be improved by cogranulating the two ingredients to form a Biosuper, Lee et al (1987) and Rajan (1987) have shown these products to be more effective with lower reactivity P rocks compared with NCPR.…”

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confidence: 96%

Phosphate sources for pasture production on summer‐dry soils in eastern New Zealand

Craighead¹

2004

New Zealand Journal of Agricultural Research

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“…It would, therefore, be economically prudent to integrate an inorganic phosphorus source with the organic materials (Jama et al, 1997). A possible source of P could be soft rock phosphate which is a colloidal phosphate containing 18% P, and is easier for plants to assimilate (Rajan, 1987;Szilas et al, 2007).…”

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confidence: 99%

Effects of Faidherbia albida on some important soil fertility indicators on agroforestry parklands in the semi-arid zone of Ghana

Akpalu¹,

Dawoe²,

Abunyewa³

2020

Afr. J. Agric. Res.

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A study was conducted in the Guinea and Sudan Savannah zones in the Upper East Region of Ghana to investigate the effects of Faidherbia albida on some important soil fertility indicators. Soil sampling and analysis, litter trap, and litter bag techniques were employed to determine the soil's content of major nutrients, the rate of litterfall production and litter decomposition, respectively. Analysis of variance (ANOVA) was performed to determine differences among treatment means, while Tukey's highest significant difference (HSD) was used to perform post hoc tests among means within the same sample set. Soils under F. albida tree canopies were found to contain significantly higher organic carbon and total nitrogen than those outside the canopies. Peak leaf litter production occurred during the first three months of the onset of the rainy season. Annual leaf litterfall was 340 g m -2 year -1 in the Guinea Savannah zone and 264 g m -2 year -1 in the Sudan Savannah zone. The high leaf litterfall, followed by high decomposition and mineralization at the beginning of the cropping season, the high nutrient content of its leaves, coupled with its nitrogen fixing ability, make F. albida a potential candidate for soil improvement and improved productivity of major crops in smallholder farming systems. About 37 and 59 adult F. albida trees will be required to supply significant amounts of nitrogen in the Guinea and Sudan Savannah zones, respectively.

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Phosphate rock and phosphate rock/sulphur granules as phosphate fertilizers and their dissolution in soil

Cited by 31 publications

References 20 publications

Effect of combined fertilization with rock phosphate and elemental sulphur on yield and nutrient uptake of soybean

Effect of combined fertilization with rock phosphate and elemental sulphur on yield and nutrient uptake of soybean

Phosphate sources for pasture production on summer‐dry soils in eastern New Zealand

Effects of Faidherbia albida on some important soil fertility indicators on agroforestry parklands in the semi-arid zone of Ghana

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