Table 2.

Phyllochron (based on air or soil temperature) by planting date and soil temperature treatment

		Phyllochron (°C days)
Planting	Soil temperature	Air		Soil
date	treatment	1998	1999	1998	1999
PD1	+0C	69·6 (2·2)	79·8 (1·5)	88·4 (2·9)	111·3 (2·8)
	+3C	67·1 (2·3)	75·0 (3·3)	106·4 (3·7)	128·9 (6·8)
	Mean	68·4 (1·5)	77·4 (1·9)	97·4 (4·0)	120·1 (4·7)
PD2	+0C	76·4 (3·0)	73·0 (0·7)	94·2 (4·0)	93·3 (1·5)
	+3C	73·8 (4·9)	72·4 (1·3)	109·9 (7·5)	111·9 (2·0)
	Mean	75·1 (2·7)	72·7 (0·7)	102·1 (4·9)	102·6 (3·7)
PD3	+0C	78·6 (2·8)	74·6 (1·0)	99·9 (3·4)	93·8 (1·3)
	+3C	72·4 (2·2)	73·9 (1·0)	108·1 (3·1)	108·0 (1·9)
	Mean	75·5 (2·0)	74·3 (0·7)	104·0 (2·6)	100·9 (2·9)
All	+0C	74·8 (1·8)	75·8 (1·0)	94·2 (2·3)	99·5 (2·7)
All	+3C	71·1 (2·0)	73·8 (1·2)	108·1 (2·7)	116·3 (3·5)
All	Both	73·0 (1·4)	74·8 (0·8)	101·2 (2·3)	107·9 (2·8)

Data are means (s.e.).