To develop a useful indicator of the start of internode elongation in wheat in the warmer regions of Japan, we analyzed the relationships between the apical development stage, stem length, and pseudostem length (from the ground to the lamina joint of the uppermost unfolded leaf) of the main shoot in wheat cultivar ‘Norin 61’. The time course of apical development differed with year and (greatly) with sowing time. Nevertheless, stem elongation was synchronized with apical development, and the internodes probably started to elongate at the floret differentiation stage. In addition, pseudostem length was highly correlated with the apical development stage (5.6 cm at the floret differentiation stage). These close relationships show that internode elongation began when the pseudostem length was ca. 5 cm. Therefore, pseudostem length could be useful as an indicator of the start of internode elongation for wheat cultivation in the warmer regions of Japan.

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For the purpose of developing a supplementary cropping during the summer for a high-rise hydroponic system of strawberries, the adaptability of a determinant tomato cultivar “Morioka 7”was evaluated. The seedlings were planted in May,and about 6 t/10a of marketable yield was harvested by the end of August. This cultivar showed a strong dwarf character, so no training or pruning was required. The total labor time was remarkably less than that for the indeterminate variety “House Momotaro”.
　The highest yield was assumed when the Yamazaki nutrition formula nutrient solution was supplied at a concentration of EC 1.2 dS/m until the early stages of harvest and 2.4 dS/m thereafter.

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