簡易透視度計を用いた用水中の窒素濃度の推定と水稲の施肥量削減技術
Estimation of total nitrogen concentration in irrigation ponds water by using a simple transparency meter and reduction of nitrogen fertilizer application on rice

Minoru MATSUYAMA, Akihiro USHIO, Takeo KUWANA, Fujiyoshi SHIBAHARA
2011 Japanese Journal of Soil Science and Plant Nutrition  
doi:10.20710/dojo.82.1_61 fatcat:a63a7py4cvhs5i5q7nnhxvhjuy