A rapid method for the determination of nitrogen, phosphorus and potassium in plant materials

1954 ◽  
Vol 5 (4) ◽  
pp. 195-200 ◽  
Author(s):  
A. J. Cavell
Keyword(s):  
Rapid Method ◽  
Plant Materials ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

Determination of Nitrogen, Phosphorus, and Potassium in Water-Soluble Fertilizers by Inductively Coupled Plasma Emission Spectrometry

1987 ◽  
Vol 70 (4) ◽  
pp. 760-761
Author(s):  
Danton D. Nygaard ◽  
John J. Sotera
Keyword(s):  
Inductively Coupled Plasma ◽  
Water Soluble ◽  
Emission Spectrometry ◽  
Inductively Coupled ◽  
Extension Tube ◽  
Plasma Emission Spectrometry ◽  
Phosphorus And Potassium ◽  
Icp Torch ◽  
Nitrogen Phosphorus

Abstract A modification of an inductively coupled plasma (ICP) emission spectrometer is described that enables the simultaneous determination of nitrogen, phosphorus, and potassium in water-soluble fertilizers. A quartz extension tube is added to the ICP torch to exclude air from the plasma, thus allowing accurate nitrogen determination without adversely affecting sensitivity for other analytes. The modification also requires an 18 mg/L argon coolant flow to protect the tube from the heat of the plasma. Detection limits are 20 mg/L for nitrogen and 50 μg/L for phosphorus and potassium. Three NBS reference salts and 2 commercially available fertilizers were analyzed by the method, and results are in excellent agreement with known values.

scholarly journals Determination of Indigenous Nutrient Supplying Capacity of Soil Through Omission Plot Experiment for Wheat in Western Terai of Nepal

2018 ◽  
Vol 35 (1) ◽  
pp. 79-87
Author(s):  
N. Rawal ◽  
N. Khatri ◽  
C. B. GC ◽  
B. P. Chaurasiya
Keyword(s):  
Grain Yield ◽  
Small Area ◽  
Optimum Dose ◽  
Experimental Site ◽  
Wheat Growth ◽  
Wheat Cultivation ◽  
Limiting Nutrient ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

The field experiment was conducted to estimate the native nutrient supplying capacity of soil in western terai of Nepal during 2013/14 and 2014/15. The experimental site consisted three areas: Pakadi VDC ward no.-3, Barrohiya of Kapilvastu district; Ramgram municipality ward no.-1, Sanda of Nawalparasi district and Tukuligadh VDC ward no.-1, Rehara of Rupandehi district. The indigenous nutrients supplying capacity of the soil was determined by establishing omission plots for wheat cultivation with six treatments each of 50 m2 and 4 farmers from each site was taken assuming one farmer as one replication. Among the six treatments, -N, -P, -K, –Zn and –B were set to estimate the inherent N, P, K, Zn and B supplying capacity of soil respectively. From two years of experiment, it has been clear that inherent N and K supplying capacity of soil in selected areas is very low. The highest grain yield of 3.33 t/ha and 2.75 t/ha was measured from fully fertilized plots in 2013/14 and 2014/15 respectively and the lowest grain yield of wheat was obtained from nitrogen missing plots in both years (1.74 t/ha and 1.51 ton/ha) followed by potassium missing plots (1.74t/ha). Farmers manage their field in a different way, so large variation was seen even in small area. Nitrogen was found to be most limiting nutrient for wheat growth followed by potassium and phosphorous in all sites. Therefore, use of optimum dose of nitrogen, phosphorus and potassium should be used for efficient nutrient uptake which ultimately increases wheat productivity.

Sequential analyte removal in flow analysis: determination of nitrogen, phosphorus and potassium in fertilizers

1995 ◽  
Vol 317 (1-3) ◽  
pp. 239-245 ◽  
Author(s):  
Patricia Benedini Martelli ◽  
JoséAnchieta Gomes Neto ◽  
Elias Ayres G. Zagatto ◽  
Sandra M.Boscolo Brienza ◽  
M.Conceição B.S.M. Montenegro ◽  
...  
Keyword(s):  
Flow Analysis ◽  
Phosphorus And Potassium ◽  
Analysis Determination ◽  
Nitrogen Phosphorus

scholarly journals Determination of optimum levels of nitrogen, phosphorus and potassium of oil palm seedlings in solution culture

Bragantia ◽  
2015 ◽  
Vol 74 (3) ◽  
pp. 247-254 ◽  
Author(s):  
Hasmah Mohidin ◽  
Mohamed Musa Hanafi ◽  
Yusop Mohd Rafii ◽  
Siti Nor Akmar Abdullah ◽  
Abu Seman Idris ◽  
...  
Keyword(s):  
Oil Palm ◽  
Solution Culture ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

Rapid determination of nitrogen, phosphorus and potassium in fertilisers by flow injection analysis

The Analyst ◽  
1977 ◽  
Vol 102 (1219) ◽  
pp. 714 ◽  
Author(s):  
E. H. Hansen ◽  
F. J. Krug ◽  
Animesh K. Ghose ◽  
J. Růžička
Keyword(s):  
Flow Injection ◽  
Flow Injection Analysis ◽  
Rapid Determination ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

Evaluation of Soil Test Methods for Available Nitrogen, Phosphorus and Potassium in Direct-Seeded Rice–Wheat Cropping Sequence

2020 ◽  
Vol 6 (02) ◽  
Author(s):  
VIJAY KANT SINGH ◽  
POONAM GAUTAM ◽  
KHARAG SINGH ◽  
SUMAN SEN ◽  
VINEET KUMAR ◽  
...  
Keyword(s):  
Test Methods ◽  
Test Method ◽  
Coefficient Of Determination ◽  
Soil Test ◽  
Available Nitrogen ◽  
Available N ◽  
Direct Seeded ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

A study was carried out in an attempt to obtain simple and efficient soil test method(s) for determination of available nitrogen (N), phosphorus (P) and potassium (K) in Mollisols. Soil samples were collected before sowing of direct-seeded rice (DSR) and wheat in sequence to evaluate the soil test methods for available N, P and K. Methods used were wet-oxidation for organic carbon (OC); alkaline KMnO4 for available N; Olsen’s-P, AB-DTPA and Mehlich-I for available P; and NH4OAc-K, AB-DTPA and Mehlich-I for available K. Suitability of these methods for given soil nutrients was evaluated by comparing the R2 values (coefficient of determination) obtained from regression analysis. Results showed that the R2 values of obtained equations by using different combinations of soil test methods for the determination of available N, P and K in soil were highly significant in both the crops. Highest R2 value for DSR (0.442**) and wheat (0.898**) were observed with the combination of OC, Olsen’s-P, ABDTPA-K, and OC, Olsen’s-P, Mehlich-K, respectively. It showed that these combinations are more promising and superior over other methods.

The relationships between tuber size and tuber concentrations of nitrogen, phosphorus and potassium

1976 ◽  
Vol 86 (3) ◽  
pp. 503-505 ◽  
Author(s):  
E. J. Allen ◽  
D. C. E. Wurr
Keyword(s):  
Dry Matter ◽  
Dry Weight ◽  
Sampling Procedure ◽  
Tuber Size ◽  
Weight Basis ◽  
Tuber Size Distribution ◽  
Plant Densities ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

SummaryIn each of two experiments two potato varieties were grown at a range of plant densities in order to provide mature tubers of different sizes for the study of the relationshipsbetween tuber size and tuber concentration of nitrogen (N), phosphorus (P) and potassium (K). As tuber size increased, the concentrations of tuber nutrients (g/100 g dry matter) declined to a minimum value and then tended to increase with a further increase in tuber size. This suggests that when tuber samples are taken for the determination of tuber nutrient concentration on a dry-weight basis the sampling procedure should ensure that results do not vary because of differences in the tuber size distribution.

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