A Model to Estimate Transition of Soil Moisture Tension in Crop Fields
スポンサーリンク
概要
- 論文の詳細を見る
The authors developed a simple model to estimate the long term transition of soil moisture tension (daily average pF value at 15cm depth in soil) for the next day (PFi+1) by the following formula, where PFi, Ei, Pi and PFmin are, pF value, daily total amount of evapotranspiration (mm·day-1), daily amount of precipitation (mm·day-1) and the minimum PF value of the field after heavy rain fall, respectively: PFi+1=α(Ei-Pi)+β·PFi+γ (when calculated PFi+1 is larger than PFmin); PFi+1=PFmin (when PFi+1 calculated by above equation is less than or equal to PFmin). The constants α, β and γ for the beet field in 1993 were 0.025a, 0.876 nd 0.25, respectively. PFmin was 1.9 for three crop fields in 1993. The standard estimate errors in PF by the equations were less than 0.2 for three crop fields in 1993.
- 日本農業気象学会の論文
日本農業気象学会 | 論文
- 局地気象学における赤外線放射温度計と熱赤外画像計測装置の有効利用
- 局地風(2)冷気の流れ
- 密閉式チャンバー法を用いた夜間の水蒸気フラックスの測定
- カキ'西条'における耐凍性の系統間評価
- 気象条件が花粉飛散を介してトウモロコシの交雑率に与える影響