Biochar Amendment Affects Leaching Potential of Copper and Nutrient Release Behavior in Contaminated Sandy Soils

2014 ◽  
Vol 43 (6) ◽  
pp. 1894-1902 ◽  
Author(s):  
Santanu Bakshi ◽  
Zhenli L. He ◽  
Willie G. Harris
Keyword(s):  
Nutrient Release ◽  
Sandy Soils ◽  
Release Behavior ◽  
Leaching Potential ◽  
Biochar Amendment

The Effect of pH in the Tap Water on Nutrient Release from Slow Release Fertilizers

2014 ◽  
Vol 931-932 ◽  
pp. 754-757
Author(s):  
Jittrera Buates ◽  
Petchporn Chawakitchareon ◽  
Rewadee Anuwattana
Keyword(s):  
Slow Release ◽  
Tap Water ◽  
Nutrient Release ◽  
Release Behavior ◽  
Release Formulation ◽  
Total N ◽  
Nutrient Contents ◽  
Scientific Methods ◽  
N Release ◽  
Slow Release Fertilizers

The objective of this research is to study the nutrient release behaviors on slow release fertilizer (Osmocote® N13:P13:K13, 3 month release formulation). The fertilizer was added into distilled water which adjusted pH of 6.5 and 7.5. The nutrient release behaviors were determined by collecting samples every 1 week and analyzed the nutrient contents in samples by scientific methods. As the result, for the total N release behavior, it may be considered that at lower pH condition tended to release more than that at higher one, for the P (shown by P2O5) and K (shown by K2O) release behaviors may be high at high pH condition.

Release Behavior of Copper and Zinc from Sandy Soils

2006 ◽  
Vol 70 (5) ◽  
pp. 1699-1707 ◽  
Author(s):  
Z. L. He ◽  
M. Zhang ◽  
X. E. Yang ◽  
P. J. Stoffella
Keyword(s):  
Sandy Soils ◽  
Release Behavior ◽  
Copper And Zinc

Preparation and Properties of the Slow-Release Fertilizer with Green Coat

2012 ◽  
Vol 518-523 ◽  
pp. 4745-4748
Author(s):  
Qing Wang ◽  
Sha Chen ◽  
Pei Guang Zhao ◽  
Yu Cao ◽  
Long Fei Zhu ◽  
...  
Keyword(s):  
Water Retention ◽  
Slow Release ◽  
Nutrient Release ◽  
Release Behavior ◽  
Digestion Method ◽  
Slow Release Fertilizer ◽  
Environmental Friendly ◽  
Influence Of Water ◽  
Slow Release Fertilizers ◽  
Kjeldahl Digestion

A kind of double-coated environmental friendly fertilizer was prepared by urea as a core, well-mixed keratin and oxidation starch as an inner coating, and superabsorbent polymer as the outer coating. The influence of water absorbency, water retention, and the slow-release behavior of the study fertilizer were investigated. 0.01M CaCl2 immersion extraction and Kjeldahl digestion method were used to measure the content of nitrogen. And the result showed that the nutrient release was 72wt% on the thirtieth day. This result corresponded with the standard of slow release fertilizers of the Committee of European Normalization (CEN) [1]. Keratin and oxidation starch were biodegradable polymer and nontoxic. Both the properties of the materials and the result of the slow-release behavior suggested a new kind of excellent, environmental friendly, slow-release fertilizer.

Study the Release of Urea from Agrium® Coated Urea Using UV-Vis Spectrometer

2014 ◽  
Vol 625 ◽  
pp. 745-748 ◽  
Author(s):  
Thanh H. Trinh ◽  
Quyen Nhat Dao ◽  
Ku Zilati Ku Shaari ◽  
Lukman Ismail ◽  
Anis Shuib
Keyword(s):  
Controlled Release ◽  
Nutrient Release ◽  
Fertilizer Application ◽  
Release Behavior ◽  
Fertilizer Effectiveness ◽  
Release Pattern ◽  
Crop Field ◽  
Coated Urea ◽  
Good Potential ◽  
Sample Dilution

Elucidating the release pattern of controlled release fertilizer (CRF) is important not just for manufactures but also for farmers because it assists them in making judgments of fertilizer effectiveness and nutrient planning. Investigation on the release pattern of different types of CRF both in the laboratory and in the crop-field is crucial in order to determine the effectiveness of fertilizer on plant growth. Consequently, the fertilizer application could be planned to meet the crop requirement. This paper presents a practical approach to analyze the release pattern using Agrium®coated urea. UV-Vis spectrometer is employed to analyze the amount of nitrogen released. The approach reduced analytical error by preventing sample dilution before measuring. According to laboratory results, UV-Vis spectrometer has shown a good potential to be used in studying the nutrient release behavior from CRF. A sigmoidal shape has been obtained from the release profile, and is corresponded with findings in other studies. The results satisfy the criteria for CRF specified by European Committee for Standardization. Collectively, this study demonstrated that the UV-Vis spectrometer is a promising equipment, which can be utilized in studying controlled release behavior.

scholarly journals Effects of Preplant Nitrogen and Sulfur Fertilizer Sources on Strawberry

2010 ◽  
Vol 20 (1) ◽  
pp. 193-196 ◽  
Author(s):  
Bielinski M. Santos
Keyword(s):  
Ammonium Sulfate ◽  
Nitrate Leaching ◽  
Total Yield ◽  
Sandy Soils ◽  
Field Studies ◽  
Fruit Weight ◽  
Growth And Yield ◽  
Appropriate Use ◽  
Leaching Potential ◽  
Marketable Fruit

Field studies were conducted to determine effects of preplant nitrogen (N) and sulfur (S) sources on ‘Strawberry Festival’ strawberry (Fragaria ×ananassa) growth and yield. Six treatments resulted from the preplant application of ammonium nitrate [AN (34% N)], ammonium sulfate [AS (21% N and 24% S)], ammonium sulfate nitrate [ASN (26% N and 14% S)], polymer-coated AS [PCAS (20% N and 23% S)], and elemental S (90% S). A nontreated control was added. The N was fixed at 50 lb/acre for AN, AS, ASN, and PCAS, which resulted in S rates of 0, 57, 27, and 57 lb/acre, respectively. The S rate of the elemental S treatment was set at 57 lb/acre. For early fruit number, the highest values were found in plots treated with AS and elemental S, while the highest total fruit numbers were obtained in plots treated with AS, ASN, PCAS, and elemental S. There was no difference in total fruit numbers between the nontreated control and AN. Plots treated with elemental S, PCAS, ASN, and AS had the highest early marketable fruit weights, whereas the lowest early marketable fruit weight was found in the nontreated plots. In comparison with the nontreated control plots, all the preplant fertilization programs improved early marketable fruit weight, with AN, AS, ASN, PCAS, and elemental S. Total marketable fruit weights were maximized in plots treated with preplant AS, ASN, PCAS, or elemental S. There was no difference between the total fruit weights obtained in the control and AN-treated plots. The data indicated that the strawberry total yield increases can be attributed to the use of preplant fertilizer sources containing S. This research may lead to a more appropriate use of N for strawberry production in Florida, minimizing the nitrate-leaching potential in high sandy soils by eliminating N sources from preplant fertilization programs.

scholarly journals ​Nutrient Release Pattern of a Fortified Manure Disc and its Implication on Yield of Tomato in Sandy Soils

2021 ◽  
Author(s):  
V. Mini ◽  
G. Suja
Keyword(s):  
Rice Husk ◽  
Nutrient Use Efficiency ◽  
Nutrient Release ◽  
Sandy Soils ◽  
Waste Materials ◽  
Npk Fertilizers ◽  
Organic Manures ◽  
Nutrient Use ◽  
Use Efficiency ◽  
Organic Formulations

Background: Development of fortified organic formulations using various organic sources and fertilizers for soil application will ensure efficient nutrient management in homestead vegetable production systems. Fortified organic formulations will help in preventing nutrient leaching also. Hence, the present study has been undertaken during 2019-20 to develop low cost fortified organic manure discs using various biodegradable agro waste materials and NPK fertilizers and to study its effect on growth and yield of tomato in sandy soils of Kerala. Methods: A fortified manure disc was developed by combining local biodegradable agro waste materials with conventional NPK fertilizers. Organic manures like rice husk ash, cow dung, rice husk, coirpith compost, vermicompost, neem cake and clay were used to develop the manure disc. The combination of organic manures was fortified with fertilizers at various proportions of manure: fertilizer viz., 1:1, 2:1, 0.5:1 and manure alone and used for incubation for a period of two months to study the nutrient release pattern of N, P and K.The 2:1(manure: fertilizer) formulation was selected based on the highest peak of nutrient availability of N, P and K even after 2 months. Effect of fortified manure disc was evaluated by using tomato variety Anagha as test crop in a pot culture experiment. Result: Growth, yield and quality of tomato increased significantly due to the application of fortified manure disc. The highest yield per plant of 0.97 kg was recorded for T8 (50% recommended dose fortified manure disc in 2 splits) and lowest yield was recorded for T9 (Manure alone). The fortified manure disc had a significant influence on nutrient use efficiency also. The highest NUE of 45.5% was recorded in treatment T8 (50% fertilizer fortified discs in 2 splits). Study revealed that fortified manure disc is a promising technology to reduce nutrient leaching and enhancing the nutrient use efficiency in sandy soils. Fifty percentage reduction in the recommended dose of NPK fertilizers were achieved by fortifying the manure disc with fertilizers.Thus the cost of fertilizers and fertilizer load per unit area can be reduced by the application of fortified manure disc which will act as slow release fertilizer.

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