Kurokawa, Y., Mori, H., Okita, M., Kubota, H., Tanaka, A., Chikamatsu, I., Tsumiyama, Y., Obitsu, T. and Kawamura, K.
Nihon Chikusan Gakkaiho 90(2) 111-120 May 2019 [Refereed]
Using the records of Hiroshima University Farm for the Holstein dairy herd from the year 2000 to 2017, we investigated the effects of the calving interval on the milk production, length of lactation and dry period, and body weight change of dairy ...
Vichet, N., Kawamura, K., Trong, D.P., On, N.V., Gong, Z., Lim, J., Khom, S. and Bunly, C.
Environments 6(5) 57 May 2019 [Refereed]
This study investigated spatio-temporal flood inundation and land cover change from 2002 to 2013 in the southern part of Cambodia using Terra satellite on-board Moderate Resolution Imaging Spectroradiometer (MODIS) images. The algorithm for flood ...
Ikeura, H., Phongchanmixay, S., Chomxaythong, A., Matsumoto, N., Kawamura, K., Homsengchanh, L. and Inkhamseng, S.
Paddy and Water Environment Apr 2019 [Refereed]
Irrigated areas in the Lao People's Democratic Republic (Laos) constitute only 12% of the total agricultural land. Most of the lowland rice is cultivated under rainfed conditions. The rice yield in rainfed fields is lower and more unstable than th...
Phongchanmixay, S., Bounyavong, B., Khanthavong, P., Khanthavong, T., Ikeura, H., Matsumoto, N. and Kawamura, K.
Paddy and Water Environment Mar 2019 [Refereed]
Savannakhet Province has 25% of the total lowland rice cultivation area of Lao People's Democratic Republic (Laos). However, most of the fields are rainfed, with highly permeable sandy soil, which has low water and nutrient availability. In such s...
Kawamura, K., Tsujimoto, Y., Nishigaki, T., Andriamananjara, A., Rabenarivo, M., Asai, H., Rakotoson, T. and Razafimbelo, T.
Remote Sensing 11(5) Mar 2019 [Refereed]
As a laboratory proximal sensing technique, the capability of visible and near-infrared (Vis-NIR) diffused reflectance spectroscopy with partial least squares (PLS) regression to determine soil properties has previously been demonstrated. However,...
Kensuke D. Kawamura, Hidetoshi Asai, Shintaro Kobayashi, Soukasdachanh Souvannasing, Phonevilay Sinavong and Thavone Inthavong
Sustainability 10(11) 4151 Nov 2018 [Refereed]
The visual characteristics of rice grains play a primary role in determining the market price, and are used for grading systems in many rice-consuming countries. Laos is a rice-consuming country in Southeast Asia, but it does not have a functionin...
Vongvichith, B., Morioka, S., Kawamura, K. and Mori, A.
Japan Agricultural Research Quarterly 52(4) 359-366 Oct 2018 [Refereed]
To determine the factors influencing the productivity of fish in rice paddies (rice-cum-fish) in Laos, this study conducted aquaculture trials using an indigenous fish (Anabas testudineus) in Feuang and Nasaythong Districts, Vientiane Province, La...
Canopy hyperspectral (HS) sensing is a promising tool for estimating rice (Oryza sativa L.) yield. However, the timing of HS measurements is crucial for assessing grain yield prior to harvest because rice growth stages strongly influence the sensi...
Automated monitoring systems with different temporal and spatial resolutions can achieve precision agriculture management. Unmanned aerial vehicle (UAV) systems open new possibilities for effectively characterizing the variability within cropping ...
Wang Zuomin, Kawamura Kensuke, Sakuno Yuji, Fan Xinyan, Gong Zhe, Lim Jihyun
REMOTE SENSING 9(3) Mar 2017 [Refereed]
Concentrations of chlorophyll-a (Chl-a) and total suspended solids (TSS) are significant parameters used to assess water quality. The objective of this study is to establish a quantitative model for estimating the Chl-a and the TSS concentrations ...
Fan Xinyan, Kawamura Kensuke, Guo Wei, Xuan Tran Dang, Lim Jihyun, Yuba Norio, Kurokawa Yuzo, Obitsu Taketo, Lv Renlong, Tsumiyama Yoshimasa, Yasuda Taisuke, Wang Zuomin
COMPUTERS AND ELECTRONICS IN AGRICULTURE 144 314-323 Jan 2018 [Refereed]
Crop growth stage is critical for making decisions in nutrient management and for evaluating crop productivity. In this study, a simple visible and near-infrared (V-NIR) camera system was developed for monitoring the leaf area index (LAI) and quan...
Sultana Nasrin, Igawa Takeshi, Islam Mohammed Mafizul, Hasan Mahmudul, Alam Mohammad Shafiqul, Komaki Shohei, Kawamura Kensuke, Khan Md. Mukhlesur Rahman, Sumida Masayuki
GENES & GENETIC SYSTEMS 91(4) 217-227 Aug 2016 [Refereed]
Kawamura, K., Watanabe, N., Sakanoue, S. and Inoue, Y.
Grassland Science 54(3) 131-145 Oct 2008 [Refereed]
Although partial least squares (PLS) regression, a full‐spectrum bilinear regression method, is widely used in laboratory calibrations of pasture quality, increasing evidence indicates that PLS models include some redundant wavelengths. Consequent...
Kawamura, K., Lim, J., Yoshitoshi, R. and Watanabe, N.
Journal of Arid Land Studies 28(1) 19-24 Jun 2018 [Invited]
Currently, unmanned aerial vehicles (UAVs) based remote sensing technology is receiving huge attentions for
their utilization in pasture management. However, there are still some challenges to consider, such as operation safety, data
management, a...
Journal of The Remote Sensing Society of Japan 32(4) 232-244 Sep 2012
The possibility of remote sensing for precision management of grassland resources through the collection of site specific data detailing vegetation and soil conditions, has been advocated during the previous 40 years. Farmers need such information...
Phongchanmixay, S., Bounyavong, B., Khanthavong, P., Khanthavong, T., Ikeura, H., Matsumoto, N. and Kawamura, K.
PAWEES-INWEPF 2018 20 Nov 2018
Savannakhet Province has 25% of the total lowland rice cultivation area of Lao Peoples Democratic
Republic (Laos). However, most of the fields are rainfed, with highly-permeable sandy soil, which has
low water and nutrient availability. In such sa...
66.Ikeura, H., Phongchanmixay, S., Chomxaythong, A., Matsumoto, N., Kawamura, K., Homsengchanh, L. and Inkhamseng, S.
PAWEES-INWEPF 2018 20 Nov 2018
Irrigated areas in Lao People’s Democratic Republic (Laos) constitute only 12% of the total agricultural
land. Most of the lowland rice is cultivated under rainfed conditions. The rice yield in rainfed fields is
lower and more unstable than that i...
In this study, we evaluated the reproducibility and compatibility of several colorimeters
and the relationship between visual and instrumental measurements of soil color. We also
examined the effects of pre-grinding treatment on the reproducibilit...
Inner Mongolia was classified in to 6 zones and grasslands were classified in 5 types. The changes of grassland areas and grass productivities during past 20 years were determined in the present research. The grassland areas remarkably decreased i...
The results indicated that herbage biomass, concentrations of nitrogen (N), crude protein (CP), neutral detergent fiber (NDF), acid detergent fiber (ADF), and legume content in white clover-grass mixtures can be estimated from field hyperspectral ...
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