Changes in the nitrogen content and pH of the mobilong clay as influenced by land use

1959 ◽  
Vol 10 (5) ◽  
pp. 637 ◽  
Author(s):  
JS Russell ◽  
DL Harvey
Keyword(s):  
Land Use ◽  
Nitrogen Content ◽  
Organic Nitrogen ◽  
Inverse Relation ◽  
Land Use Pattern ◽  
Nitrogen Levels ◽  
Probable Effect ◽  
Irrigation Drainage ◽  
Made In

The surface horizons of 40 profiles of the Mobilong clay hare been analysed for total nitrogen and pH, and the analyses compared with similar ones made in 1929. Soils which were originally high in nitrogen have declined, those with medium levels hare remained substantially the same, arid those which were originally low have increased in nitrogen content. The Mobilong clay thus appears to be approaching an equilibrium nitrogen content which under the present land use pattern of irrigation, drainage, and management approximates to 0.50 per cent. nitrogen. It seems probable that further declines will occur in the nitrogen content of those soils which are greatly in excess of this value, though at a slower rate than formerly. On the other hand increases in the nitrogen content of those soils with values less than this should occur. The implications of these changes, both in relation to future land use practices and in relation to general concepts regarding the effect of grass-legume pastures on soil nitrogen levels, are discussed. Changes in pH were found to ha essentially in inverse relation to the changes in nitrogen. Thus soils which have decreased in organic nitrogen have increased in pH, and vice versa. The probable effect of flooding and subsequent deposition on long term changes in the Mobilong clay is discussed.

Participatory Learning, Experimentation, Action and Dissemination (PLEAD)

2005 ◽  
Vol 34 (2) ◽  
pp. 111-115 ◽  
Author(s):  
Binoo P. Bonny ◽  
R.M. Prasad ◽  
Sindhu S. Narayan ◽  
Mercy Varughese
Keyword(s):  
Land Use ◽  
Field Trials ◽  
Participatory Approach ◽  
Decision Makers ◽  
Research Groups ◽  
Land Use Pattern ◽  
Participatory Learning ◽  
Agroclimatic Zones

The authors evolve a model for technology evolution and adaptation in agriculture through a participatory approach. The model follows the premise that the integration of local knowledge, the experience of farmers and quality assessment of evolved strategies help in developing technologies that promote the long-term sustainability of the system. The premise is tested through field interventions under way in 18 farmer research groups (FRG) formed for the purpose in the two agroclimatic zones of Kerala where rice forms the major crop. The experimentation is carried out in fields of selected promoter farmers from the FRGs, taking into account the existing agro-ecological peculiarities and land-use pattern. Appropriate technologies for the system are selected by the farmers from a basket of scientifically proven options and are integrated to enhance the quality of farmer-tried strategies, without researchers conducting any new experiments. The process has resulted in evolving the participatory learning, experimentation, action and dissemination (PLEAD) model, which allows interactive participation of farmers, thereby enabling them to become decision makers through the process of action–reflection–action (PRAXIS) of successful field trials conducted by them. The key elements of the model include agro-ecosystem scanning, farmer-led experimentation and farmer-to-farmer extension. The processes provide lateral and co-learning experiences that benefit all the participants.

scholarly journals TREND ANALYSIS OF LAND UTILIZATION IN BANGLADESH

2020 ◽  
Vol 6 (2) ◽  
pp. 39-46
Author(s):  
Shohel Rana ◽  
Omar Faruk ◽  
Najma Begum ◽  
Mimma Tabassum
Keyword(s):  
Land Use ◽  
Trend Analysis ◽  
Resource Use ◽  
Secondary Data ◽  
Land Utilization ◽  
Land Use Pattern ◽  
The Past ◽  
Very High ◽  
A Current ◽  
Made In

Due to alterations in physiographic and social-economic conditions, climatic changes, adaptation and population growth, the land utilization of Bangladesh is changing very rapidly. Small farms and landless household constitute about 80% of total area households, the majority of whom depend on agriculture for their livelihood. It is obvious that total agriculture land over the periods in the past has not increased although population has increased significantly [12]. Bangladesh is a small country but it bears a huge population, resulting in a very high density of population and very high intensity of land and resource use. Based on secondary data of Bangladesh Bureau of Statistics, an attempt has been made in this paper to evaluate the changes in land use pattern during the period of 1990 to 2015. Absolute utilization of land for different purposes during this period as well as trend values and growth rates were estimated. Trend analysis and exponential growth rate showed that forest area significantly increased by 35.93% and 0.3% per annum and land not available for cultivation is significantly decreased by 4.49% and 0.04%per annum respectively. Result also show that cultivate waste is significantly decreased at the rate of 1.1% per annum. On the other hand, a current fallow is decreased by 0.2% per annum. The trend values was found statistically significant for land use in forest and cultivate waste.

Capabilities of Biological Nitrogen Removal Processes from Wastewater

1991 ◽  
Vol 23 (4-6) ◽  
pp. 669-679 ◽  
Author(s):  
M. Henze
Keyword(s):  
Activated Sludge ◽  
Nitrogen Content ◽  
Nitrogen Removal ◽  
Organic Nitrogen ◽  
Biological Nitrogen Removal ◽  
Effluent Quality ◽  
Removal Processes ◽  
Biological Nitrogen ◽  
Soluble Organic Nitrogen

Biological denitrification of wastewater is a widespread technology for nitrogen removal from wastewater. Activated sludge technology is dominating over biofilm processes in practice. Recirculation and alternating processes are used to the same degree. The typical effluent quality that can be achieved on a long-term average is 4–10 mg/l of total nitrogen. Under certain circumstances effluent concentrations of 2–3 mg N/l can be obtained. Soluble organic nitrogen and nitrate are the dominating compounds in the effluent. Of these two, the soluble organic nitrogen content is difficult to control.

scholarly journals Cropping Systems and Land Use Pattern in Rajshahi Region

2018 ◽  
Vol 21 (2) ◽  
pp. 237-254
Author(s):  
M Harun Ar Rashid ◽  
ABMJ Islam ◽  
BJ Shirazy ◽  
SM Shahidullah
Keyword(s):  
Land Use ◽  
Cropping Systems ◽  
Regional Level ◽  
Cropping Pattern ◽  
Land Use Pattern ◽  
Cropping Intensity ◽  
Cropping Patterns ◽  
Maximum Value ◽  
Dominant Pattern ◽  
Made In

Attempts have been made in this paper to overview the existing cropping patterns, crops diversity and cropping intensity in Rajshahi region. The study was conducted in all the upazilas of four districts of Rajshahi region during 2014-15 using pre-tested semi-structured questionnaires. The most predominating crop in this area was rice where exclusive rice based patterns occupied 40.48% of NCA. Boro-Fallow-T. Aman was the dominant cropping pattern, occupied 22.83% of NCA in 27 upazilas out of 32. The second dominant cropping pattern in Rajshahi region was Boro-Fallow-Fallow. It occupied 7.23% of NCA of the region and existed in 28 upazilas. Wheat-Fallow-T. Aman was the 3rd dominant pattern and practiced in 4.34% of the NCA in 14 upazilas. The data also revealed that the wheat based patterns stands for 14.7% of NCA. Mustard-Boro-T. Aman was the 4th dominant cropping pattern. A total of 172 cropping patterns were recognized in this region and the maximum (36) numbers of cropping patterns were identified in Paba upazila nearly followed by Durgapur (35) and Chapainawabganj upazila (34) while the lower numbers of cropping patterns were identified in Charghat (11) followed by Bagha (12) upazila of Rajshahi district. The range of cropping intensity values was recorded 171−253%. The maximum value was for Badalgachhi of Naogaon district and minimum for Bagha of Rajshahi district. The overall CDI of Rajshahi region was calculated 0.970 and the average cropping intensity at regional level was 218%.Bangladesh Rice j. 2017, 21(2): 237-254

scholarly journals EFFECTS OF LONG-TERM CONSERVATION TILLAGE ON SOIL NITROGEN CONTENT AND ORGANIC NITROGEN COMPONENTS IN A CHINESE MOLLISOL

2018 ◽  
Vol 16 (5) ◽  
pp. 5517-5528
Author(s):  
D. D. HUANG ◽  
X. W. CHEN ◽  
G. J. CAO ◽  
A. Z. LIANG ◽  
S. X. JIA ◽  
...  
Keyword(s):  
Nitrogen Content ◽  
Soil Nitrogen ◽  
Organic Nitrogen ◽  
Conservation Tillage

Central Otago - Built on gold, growing on grass.

2014 ◽  
Vol 76 ◽  
pp. 15-23
Author(s):  
Barrie J. Wills
Keyword(s):  
Economic Growth ◽  
Land Use ◽  
National Economy ◽  
Local Community ◽  
Central Government ◽  
Future Generations ◽  
Economic Potential ◽  
District Council ◽  
Definition Of

A warm welcome to our "World of Difference" to all delegates attending this conference - we hope your stay is enjoyable and that you will leave Central Otago with an enhanced appreciation of the diversity of land use and the resilient and growing economic potential that this region has to offer. Without regional wellbeing the national economy will struggle to grow, something Central Government finally seems to be realising, and the Central Otago District Council Long Term Plan 2012-2022 (LTP) signals the importance of establishing a productive economy for the local community which will aid in the economic growth of the district and seeks to create a thriving economy that will be attractive to business and residents alike. Two key principles that underpin the LTP are sustainability and affordability, with the definition of sustainability being "… development that meets the needs of the present without compromising the ability of future generations to meet their own needs."

Land Use Pattern in India and Karnataka: A Comparative Analysis

2012 ◽  
Vol 2 (10) ◽  
pp. 1-3 ◽  
Author(s):  
Dr. Premakumara Dr. Premakumara ◽  
◽  
Seema Seema
Keyword(s):  
Land Use ◽  
Comparative Analysis ◽  
Land Use Pattern ◽  
Use Pattern
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