Results 1 to 10 of about 24,315 (160)

Comparison of the effectiveness of three extractants in extracting potassium, calcium and magnesium from tropical peat soils [PDF]

open access: yesMires and Peat, 2021
Peat soils are frequently analysed using the same standard methods and extractants as for mineral soils, despite the distinctive nature of organic soils.
Ameera Abdul Reeza   +2 more
doaj   +1 more source

The Correlation Between Active Carbon and Organic Carbon with Some of Soil Properties. [PDF]

open access: yesAl-Qadisiyah Journal For Agriculture Sciences, 2016
A biological experiment have been carried out in a wood tanta at the Department of soil science and water resources department with CRD design at three replications in 42 experimental units.
A.A. Al-Gumaily, S. S. Al-Azawi
doaj   +1 more source

Montmorillonite content is an influential soil parameter of grapevine development and yield in South Uruguay

open access: yesAgrociencia Uruguay, 2022
Soil physical and chemical characteristics play a key role on vine growth and yield. The soils of South Uruguay display high content of montmorillonite or illite.
Gustavo Pereyra   +3 more
doaj   +1 more source

Comparison of artificial neural network and multivariate regression methods in prediction of soil cation exchange capacity (Case study: Ziaran region) [PDF]

open access: yesDesert, 2010
Investigation of soil properties like Cation Exchange Capacity (CEC) plays important roles in study of environmental reaserches as the spatial and temporal variability of this property have been led to development of indirect methods in estimation of ...
A Keshavarzi, F Sarmadian
doaj   +1 more source

Reflections on the construction of innovation research team for PKS system

open access: yesDianzi Jishu Yingyong, 2023
Under the background of building cyberpower, an inherently secure autonomous computing system, i.e., PKS system, comes into being. To promote the continuous upgrades of PKS system, it is necessary to build up the innovation research team.
Wu Fanyi   +4 more
doaj   +1 more source

پهنه‎‎ بندی پارامترهای مؤثر در کیفیت حاصلخیزی خاک شالیزار برای مدیریت بهینه مصرف کود [PDF]

open access: yesپژوهش‌های حفاظت آب و خاک, 2018
سابقه و هدف: گیاهان از جمله برنج برای تأمین نیاز عناصر غذایی خود به مصرف کود احتیاج دارند تا تولید بیشتر در واحد سطح فراهم شود. برای این منظور شناسایی مقادیر عناصر پرمصرف در خاک و تهیه نقشه مناسب آن‎ها ضروری است.
حامد رضایی   +3 more
doaj   +1 more source

Électrochromatographie (CEC) ­ « Who is afraid of CEC ? » [PDF]

open access: yesAnalusis, 1999
Capillary electrochromatography (CEC) combines HPLC (High Performance Liquid Chromatography) and HPCE (High Performance Capillary Electrophoresis). The paper deals with some questions that arise to the beginner or those who are not experts in the technique. It is presented as a controversial debate between trained HPLC analyst and enthusiastic CEC user.
A. M. Siouffi, V. Tomao, J. Pesek
openaire   +1 more source

Literature Analysis of Energy Storage Research Based on Object Hierarchy

open access: yes南方能源建设, 2023
[Introduction] With the development of energy storage technology, technical schemes and application scenarios become more and more complex. For energy storage research, the conventional classification method based on technical route has certain ...
Qili LIN   +4 more
doaj   +1 more source

A Novel Hybrid Power-Grid Investment Optimization Model with Collaborative Consideration of Risk and Benefit

open access: yesEnergies, 2023
Power-grid investment (PGI) optimization is crucial for boosting investment performance, lowering investment risks, and assuring the sustainable development of power-grid businesses.
Changzheng Gao   +5 more
doaj   +1 more source

Current development situation and prospects of China-made PLC

open access: yesDianzi Jishu Yingyong, 2023
This paper briefly reviewed the history of China-made PLC and presented the domestic market situation of PLC, mainstream products of China-made PLC, PLC standards, and relevant national policies.
Lin Hao, Yang Zhenghou, Huo Yuxian
doaj   +1 more source

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