How optimizing application of coated controlled‐release urea affects crop yield in China

2022 ◽  
Author(s):  
Hongtao Zou ◽  
Chuang Ba ◽  
Zhanhan Hou ◽  
Ningxi Guo ◽  
Ming Yang ◽  
...  
Keyword(s):  
Controlled Release ◽  
Crop Yield ◽  
Controlled Release Urea

Crop yield and nitrogen concentration with controlled release urea and split applications of nitrogen as compared to non-coated urea applied at seeding

2012 ◽  
Vol 127 ◽  
pp. 170-180 ◽  
Author(s):  
C.A. Grant ◽  
R. Wu ◽  
F. Selles ◽  
K.N. Harker ◽  
G.W. Clayton ◽  
...  
Keyword(s):  
Controlled Release ◽  
Crop Yield ◽  
Nitrogen Concentration ◽  
Coated Urea ◽  
Controlled Release Urea

An economic study of controlled release urea and split applications of nitrogen as compared with non-coated urea under conventional and reduced tillage management

2013 ◽  
Vol 93 (3) ◽  
pp. 523-534 ◽  
Author(s):  
M. Khakbazan ◽  
C. A. Grant ◽  
G. Finlay ◽  
R. Wu ◽  
S. S. Malhi ◽  
...  
Keyword(s):  
Controlled Release ◽  
Crop Yield ◽  
Management Practice ◽  
Reduced Tillage ◽  
Economic Study ◽  
Quality Costs ◽  
Coated Urea ◽  
Net Revenue ◽  
The Impact ◽  
Controlled Release Urea

Khakbazan, M., Grant, C. A., Finlay, G., Wu, R., Malhi, S. S., Selles, F., Clayton, G. W., Lupwayi, N. Z., Soon, Y. K. and Harker, K. N. 2013. An economic study of controlled release urea and split applications of nitrogen as compared with non-coated urea under conventional and reduced tillage management. Can. J. Plant Sci. 93: 523–534. To evaluate the use of controlled-release urea (CRU) as a beneficial management practice for nitrogen management of wheat, barley, and canola, a multi-location study was conducted from 2004 to 2006 in a range of agro-environments across western Canada. The objective was to evaluate the relative economic performance of CRU and non-coated urea (NCU) for their effects on seed yield and quality, costs and net revenue (NR) using conventional tillage (CT) and reduced tillage (RT) management under varying environmental conditions. The NR was estimated as the income remaining after paying for all cash costs, ownership costs on machinery and buildings, and labour. The main factor affecting crop yield and NR was N application rate. In general, application of NCU produced similar or higher net revenues than that of CRU, split fertilizer applications or a blend of NCU and CRU. There were some limited situations where the use of split applications, CRU or CRU in a blend with the NCU increased crop yield as compared with NCU; however, the increased yield was not sufficient to cover the extra costs of CRU or the split application. The impact of tillage system on crop yield and NR was not consistent. Net revenue was higher under CT than RT for certain crops in some regions, but not in all regions or for all crops. Overall, NR analysis indicated that use of CRU did not provide an economic benefit over the use of NCU.

Optimization of Pan Coating Process for Increased Efficiency of Controlled-Release Urea Fertilizer

2021 ◽  
Vol 57 (4) ◽  
pp. 333-342
Author(s):  
Trung Huu Nguyen ◽  
Tran Nguyen Minh An ◽  
Mahboob Alam ◽  
Duc Hoai Tran ◽  
Nghi Tran ◽  
...  
Keyword(s):  
Controlled Release ◽  
Layer Thickness ◽  
Release Time ◽  
Coating Process ◽  
Analysis Method ◽  
Sauter Mean Diameter ◽  
Urea Fertilizer ◽  
The Relationship ◽  
Central Composite ◽  
Controlled Release Urea

The goal of the research is to develop an experimental mathematical model of pan coating process effect on the biodegradable polymer and to determine optimal process parameters. The polymer solution was conducted with phosphated di-starch phosphate, polyvinyl alcohol, and polyacrylic acid and performed as material coating for the controlled-release urea fertilizer. The image analysis method has been used to determine the particle size distribution, Sauter mean diameter of the particle and layer thickness that is novel. The central composite rotatable design has been selected to determine the regression models of the process, which described the relationship between two objective variables as layer thickness, release time with angle of pan, spray flow, and coating time. The statistical analysis results indicate the fitness of model.

The effects of controlled release urea on maize productivity and reactive nitrogen losses: A meta-analysis

2019 ◽  
Vol 246 ◽  
pp. 559-565 ◽  
Author(s):  
Wushuai Zhang ◽  
Zhengyuan Liang ◽  
Xiaoming He ◽  
Xiaozhong Wang ◽  
Xiaojun Shi ◽  
...  
Keyword(s):  
Controlled Release ◽  
Meta Analysis ◽  
Nitrogen Losses ◽  
Reactive Nitrogen ◽  
Maize Productivity ◽  
Controlled Release Urea

scholarly journals Reducing nitrogen pollution while improving tomato production by controlled-release urea application

2018 ◽  
Vol 64 (5) ◽  
pp. 632-641 ◽  
Author(s):  
Jungang Yang ◽  
Shangqiang Liao ◽  
Yanmei Li ◽  
Bing Cao ◽  
Yanxin Sun ◽  
...  
Keyword(s):  
Controlled Release ◽  
Nitrogen Pollution ◽  
Tomato Production ◽  
Controlled Release Urea

Bio‐based epoxy modified with nano‐SiO 2 and organosilicon for controlled‐release urea

2021 ◽  
pp. 51810
Author(s):  
Songling Chen ◽  
Yanyu Han ◽  
Chunyu Chen ◽  
Hongdou Liu ◽  
Hongtao Zou
Keyword(s):  
Controlled Release ◽  
Controlled Release Urea

Environmentally Friendly Slow Release Nano-Chemicals in Agriculture

2019 ◽  
pp. 220-240 ◽  
Author(s):  
Richa Kothari ◽  
Khursheed Ahmad Wani
Keyword(s):  
Controlled Release ◽  
Sustainable Agriculture ◽  
Nutrient Uptake ◽  
Crop Yield ◽  
Slow Release ◽  
Environmentally Friendly ◽  
Slow Discharge ◽  
The World ◽  
Growing Population ◽  
Controlled Release Fertilizers

Agriculture is important for people all over the world in order to obtain food to sustain the ever-growing population. However, the current practices for obtaining more and more food has several environmental challenges. Hence, new environmentally friendly fertilizers, herbicides, and pesticides have been developed that enhance crop yield by facilitating maximum nutrient uptake by the application of nanotechnology that will help in promoting sustainable agriculture by the slow or controlled release fertilizers. This slow discharge encourages improved delivery of nutrients to the plants that further speeds up early germination, fast growth, and high nutritional level. The current study is aimed to review nano-chemicals used in agriculture that have been developed by the researchers all over the world.

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