Water sources optimizing required a suitable irrigation program. Different material can use to increase water use efficiency. Superabsorbent is one of the materials where used in around the world. These materials put in the soil and absorb water so that reserved water is usable by plant in the time of drought stress and they can reduce stress and lead to prevent yield loss. Therefore, the exper...

天然資源の採掘活動は、複雑なサプライチェーンを通じて大規模な「土地の改変」を伴うことが多い。天然資源は岩石圏から抽出され、技術圏へと流れ、最終的に生態圏へと拡散する。鉱業を始めとする天然資源の採掘活動は、すなわち自然資本のストックである岩石圏への関与とみなすことができる。したがって、天然資源の採掘活動の規模を測定することで、土地改変の度合いを定量的に評価することができる。本稿では、「土地の改変量」を資源の採掘活動を定量化する方法と捉え、隠れたフローを重量という単位で評価する「関与物質総量」に注目した。まず関与物質総量と他の類似指標との差異をレビューし、関与物質総量の特徴について説明した。次に、トップダウンアプローチとボトムアップアプローチの両側面からの研究例を紹介し、特にボトムアップアプローチ について、素材だけで無く製品のライフサイクルを通じた評価例をあげた。最後に、これらの研究を...

introduction: when there is no determined value for water (as a public asset) by its trustees and beneficiaries and its allocation method is more dependent on the requirements of water consumers than comparing water affairs benefits with its real value, decision making on which interested group, when and to what extent can use water is a game. this study is aimed to determine sustainable polici...

this study assessed the chemical and microbial contents in the water of public swimming pools in akwa ibom state, nigeria. a total of 16 public pools were selected through probability sampling from the 32 pools that existed in the five urban areas of akwa ibom state. water samples were collected from the sampled pools and tested in the laboratory for chemical and microbial contents. results sho...

abstract different strategies are existed for adjusting with water shortage, of which the strategy of suitable policies adoption by determining optimum production function can be mentioned. water shortage and quality degradation of soil and water resources is one of main factors of production reduction. therefore, this study was carried out for determination of tomato sensitivity coefficients a...