71 



cept the last where it rises very slightly above the leaf area 

 value. For Easton, the -nlant growth rates show nearly the ssme 

 relative values for all the Gul-*ure periods of the season. For 

 Princjess Anne ^he stem height and leaf area graphs shov/ a de- 

 parture from the usual behavior during the first three per- 

 iods of the season. E'er these periods, leaf area is relatively 

 large and stem height relatively low for some reason not appar- 

 ent from the climatic graphs. 



The most striking ralation between the plant measu^^e- 

 ments for four-week periods exists between the leaf area and 

 the dry weight of the plants. It will be seen that for most 

 of the cultures these two plant growth rates have practically 

 the same relative numerica l value for any given period. The 

 Oakland graphs show this in all periods except the period be- 

 ginning June 5 where dry weip-ht is well above leaf area. For 

 Ghewsville, the relation shows very well throughout the sea- 

 son. For Monrovia, the leaf area number shows a rather large 

 deviation from the dry weight number in the peri ods beginning 

 June 16, June 30 and Aug. 25 but otherwise ^he two growth ra^es 

 correspond in relative value during the antire season. The 

 College graphs show close agreement, with dry weight above leaf 

 area during the firs'*: part of the season. At Baltimore, the 

 relative leaf area value differs considerably from the rela - 

 tive dry weight value in the periods beginning Aug. 6 and 

 Oct. 1 but the remaining periods bhow close agreement. The 

 Darlirigton graphs show close agreement for all periods, "^or 

 Coleman dry weight and lea-^ area agree well for all periods, 

 except those beginning Aug. 5 and Aug. 19, and for Easton no 

 large differences occur for any of the cultures. For Princess 



