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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 +...
Improving the water productivity of paddy rice (Oryza sativa L.) cultivation through water saving irrigation treatments
Pot Experiments Water Management Wetting and Drying
2013/3/5
Rice grows well under certain condition and environment including soil, water and nutrients. Some researches have shown that traditional method with continues flooding need tremendeous amount of water...
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...
Small Scale Spatial Variability of Apparent Electrical Conductivity within a Paddy Field
Spatial Variability Apparent Electrical Conductivity a Paddy Field
2009/12/2
This study aims to characterize the variability of soil ECa within a Malaysian paddy field with respect to the spatial and seasonal variability. The study was conducted at Block C, Sawah Sempadan, Sel...
Effects of Temperature,Water Regime,Light,and Soil Properties on 15N2 Fixation Associated with Decomposition of Organic Matter in Paddy Soils
heterotrophic N2 fixation photodependent N2 fixation
2009/9/10
Effective utilization of the biological nitrogen fixation (BNF) activity is important for enhancing the N fertility of paddy soils and for developing sustainable rice cultivation systems. To analyze t...
Seasonal Changes in N2 Fixation Activity and N Enrichment in Paddy Soils as Affected by Soil Management in the Northern Area of Japan
gluten index PCR marker
2009/9/10
We studied single seed descent lines derived from the Kitakeiharu 717 (KKS 717) / Grandin cross. The presence of a B subunit of KKS 717-specific low-molecular-weight-glutenin subunit (LMW-GS) signific...
The Change of Cultivation and Utilization of Chinese Milk Vetch (Astragalus sinicus L.), and the Effect of Fertilizer and Soil Fertility on Paddy Field as a Green Manure
Cultivation Utilization Chinese Milk Vetch Fertilizer Soil Fertility Paddy Field
2009/8/6
The Change of Cultivation and Utilization of Chinese Milk Vetch (Astragalus sinicus L.), and the Effect of Fertilizer and Soil Fertility on Paddy Field as a Green Manure.
A Simplified Model for Estimating Nitrogen Mineralization in Paddy Soil
Drying effect Model Nitrogen mineralization Paddy soil Soil moisture before flooding Soil incubation Temperature
2009/7/30
The estimation of available nitrogen in paddy soil is important in order to evaluate rice productivity and to improve fertilizer management. In this study, a simplified model is proposed for estimatin...
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 ...
Effect of Heavy Manure Application and Water Management on Growth and Yield and CH4 and N2O Emission from the Paddy Field
Continuous application of farmyard manure Greenhouse gas Organic paddy field Restriction of irrigation
2009/7/8
The effects of farmyard manure application and water management on the growth and grain yield of rice and CH4 and N2O emission from the paddy field were examined from 2001 to 2003. By application of ...
Studies on the Single Whole Basal Fertilizer Application to the Nursery Box for Paddy Rice in Rice-Wheat Double Cropping Area in Gunma Prefecture
Controlled availability fertilizer Covering with fused phosphate Double cropping Fertilization
2009/7/8
We studied the method of raising paddy rice seedlings using the single whole basal fertilizer application to the nursery box in the rice-wheat double cropping area in Gunma Prefecture. The seedlings ...
The Development of Special Fertilizer for Non-split Application of Fertilizer to Paddy Rice in Tomo Area of Gunma Prefecture
Coated urea Controlled availability fertilizer Labor-saving Method of fertilizer application
2009/7/8
We examined a special fertilizer for non-split application to paddy rice in order to develop a labour-saving method of feritlizer application suitable for climate, soil condition, and cultivation syst...
Effects of Wet Condition and Application of Coated Urea on Yield and Nitrogen Accumulation in Soybean Grown in the Field Converted from Heavy Clay Paddy in Hokuriku Area
Coated urea Hokuriku area Nitrogen content Soybean (Glycine max Merr.) Upland field converted from heavy clay paddy Ureide-N
2009/7/8
In Hokuriku area, the field converted from heavy clay paddy is often wet, but most of soybean is cultivated in such fields. Soybean differentiates flower buds in the rainy season, which is from late ...
Effects of Fused-Phosphate-Covering and Extension of Seedling Raising Period in the Culture of Paddy Rice by Single Whole Basal Fertilizer Application to the Nursery Box in Gunma Prefecture
Controlled availability fertilizer Fertilization Fused-phosphate-covering Method of raising seedling Nursery box Paddy rice Period of seedling raising
2009/7/8
We studied the effect of fused-phosphate-covering on seedling raising by a single application of whole basal fertilizer to the nursery box, in Gunma prefecture. The seedlings emerged in the nursery bo...