Comparative study of the determination of nitrates in calcareous soils by the ion-selective electrode, chromotropic acid and phenoldisulphonic acid methods

Hadjidemetriou, D.

doi:10.1039/an9820700025

Cited by 24 publications

(6 citation statements)

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“…Staff (1954). Nitrate-N was determined by using chromotropic acid (Sims and Jackson, 1971;Hadjidemetrious, 1982). RSC and SAR was determined by following equation using Ca 2+ , Mg 2+ , Na + , CO 3 2and HCO 3 concentrations in mmol c L -1 (U.S. Salinity Laboratory Staff, 1954).…”

Section: Methodsmentioning

confidence: 99%

Nitrate leaching losses reduction, N-use efficiency optimization in Triticum aestivum L. and Oryza sativa L. rotation to improve production and soil reclamation rate with gypsum in salt-affected soil

Rana

Murtaza

Sun

et al. 2018

IJARe

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Nitrogen management is the major challenge due to narrow understanding of yield and N uptake relationship on salt-affected soils. To address this problem, a lysimeter experiment for rice and wheat was conducted on salt-affected soil with two lower (15 and 30 %) and three higher N rates (15, 30 and 45 %) with 50 and 100 % SGR. NO3- leaching was greater with higher N rates (up to 188 mg Leachate-1) in rice as compared to wheat. After the harvesting of rice and wheat, maximum decrease in soil pHs (7.75 %), ECe (41.50 %), SAR (63.64 %) was with N130 G100 which indicated that applied gypsum 100 % SGR with higher N rate ameliorated the soil more efficiently as compared to 50 % SGR. The highest yields recorded with N130 + 100 % SGR. The highest NUE (15.88 g/g) was with treatment G100 N130 in rice but in wheat (NUE, 44.76 g/g) G100 N70 proved to be the best. It was concluded that G100 N130 proved to be the best and reduced the environmental risks.

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Section: Methodsmentioning

confidence: 99%

Nitrate leaching losses reduction, N-use efficiency optimization in Triticum aestivum L. and Oryza sativa L. rotation to improve production and soil reclamation rate with gypsum in salt-affected soil

Rana

Murtaza

Sun

et al. 2018

IJARe

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“…% digestible organic matter in dry matter. Nitrogen concentration was determined by the Kjeldahl method and nitrate-N by using an ion-selective electrode (Hadjidemetriou, 1982). The 150 g samples were separated into green leaf, dead leaf, 'stem', inflorescence (all of the sown species) and unsown species.…”

Section: Methodsmentioning

confidence: 99%

Effects of harvesting programme and sowing date on the forage yield, digestibility, nitrogen concentration, tillers and crop fractions of barley in Cyprus

Droushiotis

Wilman

1987

J. Agric. Sci.

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All combinations of four harvesting treatments and two sowing dates were compared in each of 3 years in field experiments near Nicosia. In two of the years, different levels of applied nitrogen were compared. The harvesting treatments were: (1) a milk-stage cut, (2) a boot-stage cut and a regrowth cut, (3) a grazing-stage cut and a regrowth cut, and (4) three grazing-stage cuts and a regrowth cut. The sowing dates were (1) normal (12 November) and (2) early (15 October), with sufficient irrigation to ensure establishment.There was almost no response to applied nitrogen, evidently because of high reserves of available nitrogen in the soil. Early sowing reduced by 20 days the time taken to reach the stage at which the first node appeared, but increased, by 36 days, the length of time between the first node and the milk stage. Early sowing increased yield when the first cut was at the grazing stage, but reduced yield when the first cut was at the boot or milk stage.At the grazing stage, the proportion of green leaf blade and the concentrations of nitrogen and nitrate-N were relatively high (means 74, 4-0 and 013% respectively) and digestibility was moderate (mean D-value 61). By the boot stage, green leaf, nitrogen and nitrate-N, but not digestibility, had declined (means 21, 1-8, O02 and 63 respectively). By the milk stage, green leaf, nitrogen and digestibility, but not nitrate-N, had declined further (means 3, 1'5, 48 and 0-05 respectively). Fully dead leaf blades were 28 units less digestible and 3'2 percentage units lower in nitrogen concentration than emerging leaves. Half dead leaf blades were higher in nitrate-N than fully expanded, fully green blades.

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“…This method is based on titration with potassium dichromate, and on this equation (SOM=1.72×OC). Kjeldahl method (Buchi, Switzerland) evaluated total nitrogen concentration (TN), and complexation with chromotropic acid helped to measure nitrate content by using absorbance in a spectrophotometer (Spectronic, USA) fixed at 410 nm (Hadjidemetriou, 1982). Colorimetry method fixed at 882 nm determined phosphorus content (Olsen et al, 1954).…”

Section: Soil Analysismentioning

confidence: 99%

Impact of No-Till on physicochemical properties of Vertisols in Chaouia region of Morocco

Aboutayeb¹,

Yousfi²,

Gharras³

2020

Eurasian Journal of Soil Science (Ejss)

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Conservation agriculture (CA) relies on low soil disturbance, mulching, and crop rotation, and these characteristics present CA as a good candidate to control soil degradation and preserve soil fertility. Therefore, agricultural scientists promote it as an efficient technique to sustain agricultural production. Conventional tillage (CT) dominates many semi-arid regions of Morocco, like Chaouia. However, crop/livestock management worsens degradation of soil organic matter and thus soil fertility. Since the eighties', controlled experimental trials tried to promote No-Till (NT) system in these regions. But it is still experiencing a low level of adoption. This on-farm research study aimed to evaluate NT effect on some Vertisols' physicochemical properties of this region. Analysis of variance only found a significant NT effect on soil organic matter (SOM), but factorial analysis provided evidence of a behavior of its effect on several physicochemical properties such as active limestone (CaCO3), total nitrogen (TN), nitrate (NO3-), calcium (Ca 2+), potassium (K +) and cation exchange capacity (CEC). Furthermore, pH, Electrical Conductivity (EC) and sodium (Na +) did not show any significant difference between the two tillage treatments. This study also found that continuous cereal cropping with no mulching management mostly explains this low improvement in soil quality. This last approach, reduce CA to NT process. To promote CA in these regions, more efforts are still needed for a satisfactory up-scaling and a sustainable soil fertility conservation.

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Comparative study of the determination of nitrates in calcareous soils by the ion-selective electrode, chromotropic acid and phenoldisulphonic acid methods

Cited by 24 publications

References 0 publications

Nitrate leaching losses reduction, N-use efficiency optimization in Triticum aestivum L. and Oryza sativa L. rotation to improve production and soil reclamation rate with gypsum in salt-affected soil

Nitrate leaching losses reduction, N-use efficiency optimization in Triticum aestivum L. and Oryza sativa L. rotation to improve production and soil reclamation rate with gypsum in salt-affected soil

Effects of harvesting programme and sowing date on the forage yield, digestibility, nitrogen concentration, tillers and crop fractions of barley in Cyprus

Impact of No-Till on physicochemical properties of Vertisols in Chaouia region of Morocco

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