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PRELIMINARY STUDY ON THE RADAR VEGETATION INDEX (RVI) APPLICATION TO ACTUAL PADDY FIELDS BY ALOS/PALSAR FULL-POLARIMETRY SAR DATA
SAR Radar Vegetation Index
2015/5/6
Kim and van Zyl (2001) proposed a kind of radar vegetation index (RVI). RVI = 4*min(λ1, λ2, λ3) / (λ1 + λ2 + λ3) They modified the equation as follows. (2009) RVI = 8 * σ0 hv / (σ0 hh + σ0 vv +...
Molecular genosystematic and physiological characteristics of fluorescent pseudomonads isolated from the rice rhizosphere of Iranian paddy fields
Fluorescent pseudomonads rice rhizosphere IAA production phosphate solubilization siderophore production gene typing
2011/2/22
The great progress achieved in the use of molecular genosystematics permits the study to solve many problems of specificity in the relationship between plant and microbial population of the rhizospher...
Nitrogen Dynamics of Organic Materials Applied to Paddy Fields: Direct Evaluation Using Organic Materials Labeled with Nitrogen-15
compost manure nitrogen use efficiency plant residue rice
2011/2/24
In this study, 15N-labeled organic materials were used to evaluate the nitrogen (N) dynamics associated with the application of organic materials to paddy fields. The decomposition of three types of o...
Dry Matter Productivity of High Biomass Sugarcane in Upland and Paddy Fields in the Kanto Region of Japan
Erianthus spp., sorghum Dry Matter Productivity High Biomass Sugarcane
2010/10/25
Eight high biomass sugarcane clones and two commercial sugarcane cultivars were planted in upland and paddy fields in Tsukuba in 2003-2005 to identify a new crop suitable for abandoned
paddy fields i...
Development of Air-assisted Strip Seeding for Direct Seeding in Flooded Paddy Fields
paddy direct seeding in flooded field air-assisted seeding
2010/12/2
We have investigated the use of air-assisted strip seeding for direct seeding in flooded paddy fields. A seeder was developed using a commercially available granule applicator remodelled for tractor i...
Strategies for Controlling the Apple Snail Pomacea canaliculata (Lamarck) (Gastropoda: Ampullariidae) in Japanese Direct-Sown Paddy Fields
golden apple snail management rice direct seeding
2009/9/9
The apple snail Pomacea canaliculata becomes a much more serious pest in direct-sown rice fields than in transplanted fields. In south Japan, it represents an important constraint on the implementatio...
Forage Cropping System of Natural-reseeded Barnyardgrass (Echinochloa crus-galli) for Abandoned Paddy Fields and Its Feasibility in Mountainous Area
early-maturing ryegrass mid- to late-maturing ryegrass productivity cost subsidy
2009/9/9
A field experiment was carried out from October 1999 to September 2001 to establish a cropping system with Italian ryegrass (Lolium multiflorum) and natural-reseeded barnyardgrass (Echinochloa crusgal...
Forage Cropping System of Natural-reseeded Barnyardgrass (Echinochloa crus-galli) for Abandoned Paddy Fields and Its Feasibility in Mountainous Area
early-maturing ryegrass mid- to late-maturing ryegrass productivity cost subsidy
2009/9/9
A field experiment was carried out from October 1999 to September 2001 to establish a cropping system with Italian ryegrass (Lolium multiflorum) and natural-reseeded barnyardgrass (Echinochloa crusgal...
Present State of Research on Development of a High Clearance Vehicle for Paddy Fields
High clearance vehicle paddy field mobility number rolling resistance tractive performance
2010/11/12
The concepts of developing a high clearance vehicle for paddy field have been investigated.
The vehicle can be used and maintained by small size farm for paddy fields. The in-field performance of the...
Factors Affecting Forest Formation in Abandoned Terraced Paddy Fields in a Mountainous Region
abandoned terraced paddy field groundwater level growing site microtopography soil water content
2009/8/24
Factors affecting forest formation were studied in abandoned terraced paddy fields in a mountainous region of Sado Island, Niigata Prefecture, Japan. Shortly before or after the study area was abandon...
Patterns of Soil Nitrogen Release in Paddy Fields of Warm Regions in Japan and Diagnosis of Fertilizer Application : I. Influence of soil nitrogen release from paddy soils on growth and yield of rice plants of warm regions
Basal application of nitrogen Nitrogen uptake Rice plants Soil fertility
2009/8/5
The Influence of nitrogen release from paddy soils on the grain yield of rice plants was investigated, and the optimum amount of nitrogen fertilizer application was estimated for each of the soil nitr...
Patterns of Soil Nitrogen Release in Paddy Fields of Warm Regions in Japan and Diagnosis of Fertilizer Application : II. Characteristics of soil nitrogen mineralization and nitrogen uptake patterns of rice plants in Fukuoka Prefecture
Amount of nitrogen uptake Fertilizer nitrogen Nitrogen mineralization Paddy soils Soil nitrogen
2009/8/4
Topsoils collected from various regions in Fukuoka Prefecture were incubated and the amount of mineralized nitrogen was measured. The relationship between the mineralized nitrogen amount (N) and the ...
Patterns of Soil Nitrogen Release in Paddy Fields of Warm Regions in Japan and Diagnosis of Fertilizer Application : III. Evaluation of amount of soil nitrogen supplied from paddy fields in relation to rice yield
Ammonification Nitrogen uptake Paddy soils Rate of Fertilizer application Soil nitrogen
2009/7/30
It was investigated whether the amount of ammonification could be used as an index of soil analysis for fertilizer application, which was related with the amount of soil nitrogen supplied from paddy f...
Toposequential Variation in Soil Fertility and Rice Productivity of Rainfed Lowland Paddy Fields in Mini-Watershed (Nong) in Northeast Thailand
Clay Farmer’s management Northeast Thailand Rainfed rice Soil fertility Soil organic carbon Toposequence
2009/7/29
Mini-watersheds called Nong in Thai are geographical components of rainfed lowland rice culture in Northeast Thailand, and constitute distinct units in understanding environmental constraints for low ...
Effects of Temperature,Sowing Depth and Soil Hardness on Seedling Establishment and Yield of Cambodian Rice Direct-seeded in Flood Paddy Fields
Growth Low temperature Seedling establishment Sowing depth Water drainage before sowing Yield
2009/7/23
Rice is the most important crop for supporting Cambodian economy, however the cultivated area is limited due to the rice production system. Rice is transplanted by hand and yet the direct-seeding tech...