Automatic methods for the determination of nitrogen, phosphorus and potassium in plant material

The Analyst ◽  
1966 ◽  
Vol 91 (1079) ◽  
pp. 119 ◽  
Author(s):  
J. A. Varley
Keyword(s):  
Plant Material ◽  
Automatic Methods ◽  
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 Nutrient Interactions and Deficiency Diagnosis in the Lettuce

1955 ◽  
Vol 8 (3) ◽  
pp. 301 ◽  
Author(s):  
DW Goodall ◽  
AE Grant Lipp ◽  
WG Slater
Keyword(s):  
Plant Material ◽  
Dry Weight ◽  
Sand Culture ◽  
Nutrient Interactions ◽  
Stages Of Development ◽  
Culture Experiment ◽  
Foliage Plants ◽  
Phosphorus And Potassium ◽  
The Relationship ◽  
Nitrogen Phosphorus

A sand-culture experiment with lettuces is described, having as its principal purpose the study of the relationship between the potential responses of plants to applications of nitrogen, phosphorus, and potassium fertilizers and the composition of. their foliage. Plants were supplied initially with five levels of these nutrients in all combinations, samples of plant material were taken fot analysis at various stages of development, and at 44 days from sowing additional quantities of nutrients were supplied to some of the cultures in order that their response potentialities might be determined. The present paper analyses the effects of the nutrient interactions on plant dry weight, further results being left to subsequent papers.

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
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