Keizo Hirai

Effects of freeze–thaw cycles resulting from winter climate change on soil nitrogen cycling in ten temperate forest ecosystems throughout the Japanese archipelago

Rieko Urakawa, Hideaki Shibata, Megumi Kuroiwa et al. · Soil Biology and Biochemistry · 2014 · 113 citations

Freeze-thaw Cycling, Biogeochemistry, Terrestrial Ecosystem +7

Factors contributing to soil nitrogen mineralization and nitrification rates of forest soils in the Japanese archipelago

Rieko Urakawa, Nobuhito Ohte, Hideaki Shibata et al. · Forest Ecology and Management · 2015 · 94 citations

Biogeochemistry, Engineering, Nitrogen Mineralization +7

Transport Rates of Surface Materials on Steep Forested Slopes Induced by Raindrop Splash Erosion

Satoru Miura, Keizo Hirai, Tsuyoshi Yamada · Journal of Forest Research · 2002 · 86 citations

Engineering, Forest Hydrology, Geomorphology +23

Fate of organic carbon during decomposition of different litter types in Japan

Kenji Ono, Syuntaro Hiradate, Sayaka Morita et al. · Biogeochemistry · 2011 · 71 citations

Organic Geochemistry, Biogeochemistry, Environmental Chemistry +6

Humification processes of needle litters on forest floors in Japanese cedar (Cryptomeria japonica) and Hinoki cypress (Chamaecyparis obtusa) plantations in Japan

Kenji Ono, Syuntaro Hiradate, Sayaka Morita et al. · Plant and Soil · 2010 · 70 citations

Forest Soil, Botany, Needle Litters +3