Dissolution of Coated Urea Fertilizer and Absorption of Tea Plants in Tea Field Soil.

2000 ◽  
pp. 31-38 ◽  
Author(s):  
Masakazu SHIWA ◽  
Kiyoo YOSHIZAWA ◽  
Masatomo ITO
Keyword(s):  
Field Soil ◽  
Urea Fertilizer ◽  
Coated Urea ◽  
Tea Plants ◽  
Tea Field

Laboratory tests on sorption and transformation of the insecticide flubendiamide in Japanese tea field soil

2013 ◽  
Vol 443 ◽  
pp. 904-909 ◽  
Author(s):  
Susen Hartung ◽  
Masahide Iwasaki ◽  
Naoto Ogawa ◽  
Robert Kreuzig
Keyword(s):  
Laboratory Tests ◽  
Field Soil ◽  
Tea Field

Controlled-Release Material for Urea Fertilizer from Polylactic Acid

2008 ◽  
Vol 55-57 ◽  
pp. 897-900 ◽  
Author(s):  
J. Papangkorn ◽  
C. Isaraphan ◽  
S. Phinhongthong ◽  
Mantana Opaprakasit ◽  
Pakorn Opaprakasit
Keyword(s):  
Controlled Release ◽  
Polylactic Acid ◽  
Urea Fertilizer ◽  
Technique Effect ◽  
Preparation Conditions ◽  
Micron Size ◽  
Coated Urea ◽  
Urea Release ◽  
Uv Visible ◽  
Controlled Release System

Urea fertilizer is a major source of nitrogen, which is one of the essential nutrients for plant growth. Due to its uncontrollable release, this chemical can be wasted easily by leaching and volatilization that can adversely cause the contamination to the environment. In this work, a controlled-release material for urea fertilizer has been prepared by using degradable polylactic acid. Unlike other conventional controlled-release system, the resulting material is able to provide an efficient supply of urea fertilizer, without causing further contamination to the environment from residue material, as polylactic acid can be degraded in the environment. Micron-size particles of polylactic acid coated urea were prepared by employing atomizing technique. Effect of the preparation conditions; urea/PLA composition, PLA concentration, and pressure of atomizing gun on the particle size of material are investigated. The urea release rate of these samples is then studied by employing UV-Visible spectrophotometer. In addition, the effect of preparation conditions on shape and morphology of sample is determined by using Scanning Electron Microscope (SEM).

Properties of protease extracted from tea-field soil

2000 ◽  
Vol 30 (4) ◽  
pp. 351-355 ◽  
Author(s):  
Y. Kamimura ◽  
K. Hayano
Keyword(s):  
Field Soil ◽  
Tea Field

scholarly journals Influence of Biodegradable Polymer Coated Urea on Nitrogen Uptake and Utilization of Maize (Zea mays L)

2021 ◽  
pp. 297-306
Author(s):  
B. Balaganesh ◽  
P. Malarvizhi ◽  
N. Chandra Sekaran ◽  
P. Jeyakumar ◽  
K. R. Latha ◽  
...  
Keyword(s):  
Grain Yield ◽  
Nitrogen Uptake ◽  
Nitrogen Use Efficiency ◽  
Biodegradable Polymer ◽  
Dry Matter ◽  
Nitrogen Use ◽  
Urea Fertilizer ◽  
Coated Urea ◽  
Use Efficiency ◽  
Polymer Coated Urea

Controlled release nitrogen fertilizers could be an excellent management approach for improving nitrogen fertilizer efficiency. The present study aimed to investigate the effect of coated urea fertilizers to increase nitrogen uptake and utilization of maize. The nitrogen use efficiency of maize from various biodegradable polymer-coated urea fertilizers, such as palm stearin coated urea (PSCU), pine oleoresin coated urea (POCU), and humic acid coated urea (HACU), was determined in a pot culture experiment conducted at the Department of Soil Science and Agricultural Chemistry, Tamil Nadu Agricultural University, Coimbatore, during 2021. The coating materials have been coated on urea with different coating thicknesses, viz., PSCU - 5, 10, 15%, POCU – 2, 4, 6%, and HACU - 5, 10, 15%. Among all the treatments, T11: HACU 15% produced highest grain yield (72.0g plant-1) followed by T7: POCU 4% (69.7 g plant-1) and T4: PSCU 10% (69.0g plant-1). In terms of dry matter production, T10: PSCU 10% produced maximum dry matter (186.5g plant-1), followed by T11: HACU 15% (186.2 g plant-1), and T7: POCU 4% (185.3g plant-1). The nitrogen uptake by the maize plant was higher in T7: POCU 4 % (1.62g plant-1), followed by T11: HACU 15% (1.59 g plant-1) and T4: PSCU 10% (1.59g plant-1). Irrespective of treatments, the highest nitrogen utilization by the maize crop was found in T7: POCU 4% (73.9%) followed by T4: PSCU 10% (71.1%) and T11: HACU 15% (70.9%) treatments. When compared to uncoated urea fertilizer, all coated urea fertilizers outperformed uncoated urea fertilizer in terms of grain yield, dry matter accumulation, and nitrogen uptake. To improve the nitrogen use efficiency, coated urea fertilizers prove to be a promising alternative to uncoated urea fertilizers.

scholarly journals Spout Fluidized Bed Assisted Preparation of Poly(tannic acid)-Coated Urea Fertilizer

ACS Omega ◽  
2020 ◽  
Vol 5 (2) ◽  
pp. 1127-1133 ◽  
Author(s):  
Yu Wang ◽  
Heling Guo ◽  
Xiaolin Wang ◽  
Zhiyuan Ma ◽  
Xie Li ◽  
...  
Keyword(s):  
Fluidized Bed ◽  
Tannic Acid ◽  
Urea Fertilizer ◽  
Coated Urea

scholarly journals Characters of aflatoxigenic fungi isolated from silkworm frass and tea field Soil in Japan

1999 ◽  
Vol 1999 (49) ◽  
pp. 35-38
Author(s):  
Yoko ITO ◽  
Tetsuhisa GOTO ◽  
Stephen W. PETERSON
Keyword(s):  
Field Soil ◽  
Aflatoxigenic Fungi ◽  
Tea Field

Response of N2O emissions to biochar amendment on a tea field soil in subtropical central China: A three-year field experiment

2021 ◽  
Vol 318 ◽  
pp. 107473
Author(s):  
Yanzheng Wu ◽  
Yong Li ◽  
Honghao Wang ◽  
Zijun Wang ◽  
Xiaoqing Fu ◽  
...  
Keyword(s):  
Field Experiment ◽  
Central China ◽  
N2o Emissions ◽  
Field Soil ◽  
Tea Field ◽  
Biochar Amendment
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