scholarly journals Soil fertility capability classification (FCC) for rice production in Cameroon lowlands

2013 ◽  
Vol 8 (17) ◽  
pp. 1650-1660 ◽  
Author(s):  
F O Tabi ◽  
E S C Ngobesing ◽  
G S Yinda ◽  
A Boukong ◽  
M Omoko ◽  
...  
Keyword(s):  
Soil Fertility ◽  
Rice Production

scholarly journals Economics of Trade-off Between Urea Nitrogen and Poultry Litter for Rice Production

1994 ◽  
Vol 26 (2) ◽  
pp. 552-564 ◽  
Author(s):  
Ramu Govindasamy ◽  
Mark J. Cochran ◽  
David M. Miller ◽  
Richard J. Norman
Keyword(s):  
Soil Fertility ◽  
Cost Minimization ◽  
Poultry Litter ◽  
Rice Production ◽  
Yield Response ◽  
Urea Nitrogen ◽  
Trade Off ◽  
Relative Prices ◽  
Using Data ◽  
Fresh Litter

AbstractThis paper identifies optimal combinations of nitrogen in the form of urea, fresh litter and composted litter for rice production. Traditional cost minimization techniques using data from experimental results conducted at three sites in Arkansas during 1991 have been employed. Comparisons between different scenarios indicate that the trade-off between the use of poultry litter and urea nitrogen depends on such factors as soil fertility, the yield response to litter application and the relative prices of nitrogen and litter. The use of litter is more economical at high target yields than at low target yields.

scholarly journals Soil fertility management for organic rice production in the Lao PDR

2006 ◽  
Vol 21 (4) ◽  
pp. 253-260 ◽  
Author(s):  
W. Roder ◽  
S. Schürmann ◽  
P. Chittanavanh ◽  
K. Sipaseuth ◽  
M. Fernandez
Keyword(s):  
Soil Fertility ◽  
Green Manure ◽  
Crop Residues ◽  
Production Systems ◽  
Upland Rice ◽  
Lao Pdr ◽  
Rice Production ◽  
Inorganic Fertilizer ◽  
Fertility Management ◽  
Organic Rice

AbstractRice is the most important agricultural commodity of the Lao People's Democratic Republic (Lao PDR), produced largely using traditional methods with limited inputs of fertilizers and other chemicals. The country has a wide diversity in rice production systems and rice varieties, with over 3000 different varieties recorded. The rich diversity and the production environment and methods are favorable for organic rice production. Investigations were carried out to describe soil fertility conditions, management practices, opportunities and problems associated with organic production methods for rice. Soils used for rice production are mostly of low fertility, with low organic matter and N-availability. In spite of this, virtually no fertilizer inputs are used for upland rice production. Inorganic fertilizer inputs for lowland rice production have increased rapidly over the past decade, but are still below 20 kg ha−1. The most important nutrient sources are rice straw and manure from buffalo and cattle. Chromolaena odorata plays an important role in nutrient cycling in upland rice systems and is sometimes added to lowland fields. In a range of fertility management studies, yield increase ranged from 2 to 89% for manure, straw or rice husk applied at modest rates (3 t ha−1), 32–156% for modest rates of inorganic fertilizer (60 kg N ha−1) and 36–167% for combined application of manure or crop residues with inorganic fertilizer. The response to locally produced commercial organic fertilizer was poor. The most promising inputs and strategies available to optimize yields in organic rice production systems are (1) optimizing use of locally available nutrients, mostly from manure, crop residues and weed biomass, (2) N addition through green manure and legumes growing in rotation and (3) additions of P through guano or rock-phosphate. The Lao PDR is fortunate to have substantial bat guano deposits in limestone caves. Extensive experience is available on straw and husk management for lowland systems and green manure species for upland production systems.

scholarly journals Elucidating the effect of super oxide dismutase and photosynthetic rate of rice crop variety Pant Dhan 4

2020 ◽  
Vol 1 (1) ◽  
pp. 42-45
Author(s):  
Neelam Pankaj ◽  
◽  
Kiran Bharti ◽  
Gurdeep Bains ◽  
◽  
...  
Keyword(s):  
Soil Fertility ◽  
Field Experiment ◽  
Soil Quality ◽  
Photosynthetic Rate ◽  
Rice Plant ◽  
Cropping System ◽  
Crop Productivity ◽  
Rice Production ◽  
Super Oxide Dismutase ◽  
Crop Variety

A field experiment was carried out during Kharif season of 2010 and 2011 to study the effect of different nutrients treatments on the productivity of rice. Application of NPK with FYM and Zn proved to be superior in recording the highest Photosynthetic rate and Super Oxide Dismutase. Although fertilizers are important for enhancing rice production but excess use of fertilizer cause deterioration of soil quality which ultimately affect crop productivity so it is required to investigate the physiological aspects of rice plant under integrated nutrients. When imbalanced fertilizers doses are given to the rice-wheat cropping system, they showed a considerable decline in crop productivity and soil fertility.

scholarly journals Soil fertility along toposequences of the East India Plateau and implications for productivity and sustainability

2020 ◽  
Author(s):  
Peter S. Cornish ◽  
Ashok Kumar ◽  
Sudipta Das
Keyword(s):  
Land Use ◽  
Oryza Sativa ◽  
Soil Fertility ◽  
Surface Soil ◽  
Rice Production ◽  
Future Research ◽  
Soil Fertility Management ◽  
Fertility Management ◽  
Transplanted Rice ◽  
Small Watersheds

Abstract. In common with other undulating landscapes in Asia, rice (Oryza sativa) on the East India Plateau (EIP) was once confined to hydrologic discharge areas or lowlands, but progressive terracing has now allowed rainfed transplanted rice to encroach upon upland recharge areas, with potential effects on both hydrology and soil fertility. Hydrologic variation down the toposequence and its implications for rice production have been well documented, but not the variation in soil fertility. Measurements of surface-soil fertility in seven of 24 EIP Districts were used to evaluate variation between and within small watersheds stratified down the toposequence into six land classes that reflect hydrology and land use (three with rice and three without, 36 fields/watershed). We aimed to provide a basis for future research to improve soil fertility management. Soils overall were acid, with 14 % of fields requiring liming (pH 

scholarly journals Soil Fertility Potential for Rice Production in West African Lowlands

2010 ◽  
Vol 44 (4) ◽  
pp. 343-355 ◽  
Author(s):  
Susumu S. ABE ◽  
M. Moro BURI ◽  
Roland N. ISSAKA ◽  
Paul KIEPE ◽  
Toshiyuki WAKATSUKI
Keyword(s):  
Soil Fertility ◽  
West African ◽  
Rice Production ◽  
Fertility Potential

scholarly journals Organic Amendments Boost Soil Fertility and Rice Productivity and Reduce Methane Emissions from Paddy Fields under Sub-Tropical Conditions

2021 ◽  
Vol 13 (6) ◽  
pp. 3103
Author(s):  
Md Mahamudul Haque ◽  
Juel Datta ◽  
Tareq Ahmed ◽  
Md Ehsanullah ◽  
Md Neaul Karim ◽  
...  
Keyword(s):  
Soil Fertility ◽  
Soil Ph ◽  
Soil Amendment ◽  
Organic Amendments ◽  
Rice Production ◽  
Inorganic Fertilizer ◽  
Paddy Fields ◽  
Rice Grain ◽  
Ch4 Emission ◽  
Rice Productivity

Deteriorating soil fertility and gradually decreasing rice productivity along with higher greenhouse gas emissions from paddy fields have emerged as serious threats to the sustainability of rice production and food security. Rice production in the subtropical environment in Bangladesh is mostly dependent on synthetic inorganic fertilizer to maintain productivity; however, the inorganic fertilizer has negative effects on global warming. Climate-smart and resilient agricultural production systems are major concerns nowadays to meet sustainable development goals. The study was conducted to evaluate the optimum rate and source of organic amendments on rice productivity and soil fertility along with CH4 emission. A total of nine nutrient combinations were used in the study. The CH4 emission, soil redox potential (Eh), soil pH, soil nitrogen and organic carbon, available phosphorus, rice grain and straw were greatly affected by the application of different rates and sources of the nutrient. However, the soil exchangeable K content, plant height, and harvest index were not affected. Among the treatments, the application of 75% recommended fertilizer (RF) + biosolid 2 t ha−1 (T3) was the most effective and showed the superior performance in terms of available P (12.90 ppm), the number of grains panicle−1 (121), and 1000-grain weight (24.6g), rice grain, and straw yield along with the moderate CH4 emission (18.25 mg m−2h−1). On the other hand, the lowest soil Eh (−158 mV) and soil pH (6.65) were measured from the treatment T3. The finding of this study revealed that the application of 75% of RF + biosolid 2 t ha−1 can be recommended as the preferable soil amendment for boosting rice yield, reduce CH4 emissions, and sustainably maintain soil fertility. Furthermore, this finding may help to introduce preferable soil amendment doses, which will contribute to boosting rice productivity and economic turnouts of the farmers.

scholarly journals Arable crops production cycle with SPA technologies

2020 ◽  
pp. 9
Author(s):  
José Rafael Marques da Silva ◽  
Manuela Correia ◽  
João Coimbra
Keyword(s):  
Soil Fertility ◽  
Rice Production ◽  
Production Cycle ◽  
Net Income ◽  
Corn Production ◽  
Arable Crops ◽  
Crop Monitoring ◽  
Text Document

Three case study situations are presented and analysed in this topic about rice and corn production cycle. The materials created include: i) A video describing rice production cycle in Portugal, using SPA technologies. This video shows the terrain preparation, sowing, herbicide and fertilizers application and harvesting, explaining all the operations; ii) A presentation of a case study, also about rice production, describing other important issues related to the use of SPA, like determining soil fertility and nutrient needs, relationships between NDVI and productivity, smart sampling, crop monitoring, net income analysis and ways to improve productivity. iii) A presentation showing the use of several SPA technologies in corn production complemented with a text document.

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