Table 1 Contribution of Various Greenhouse-Effect Gasses to the

Atmospheric Greenhouse-Effect

^*ppm denotes parts per million.

　

Table 2 Area Frequency Distribution of Net Primary Productivity

of Terrestrial Vegetation

(Seino･Uchijima, 1992)

Table 3 Average Water Use Efficiency of Crop Groups

(Calculation based on Arkley, 1982)

Unit： grams of dry matters per kilograms of transpiration

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