Planting Date and Seeding Rate Effects on Sunn Hemp Biomass and Nitrogen Production for a Winter Cover Crop

Table 1

Monthly precipitation recorded during each sunn hemp and rye growing season from 2007 to 2009 in east-central Alabama.

Sunn hemp growing season precipitation (mm)^a				Rye growing season precipitation (mm)^a
Month	2007-2008	2008-2009	Average^b	Month	2007-2008	2008-2009	Average^b
June	29.2	50.3	99.1	Dec.	94.5	82.3	93.7
July	173.2	126.2	111.1	Jan.	110.7	52.1	95.8
Aug.	82.8	252.0	102.1	Feb.	101.9	105.2	91.8
Sep.	55.9	18.8	85.1	Mar.	77.5	243.6	146.1
Oct.	75.4	83.1	71.3	Apr.	100.6	109.2	97.7
Nov.	54.6	92.7	106.9
Total	471.2	623.1	575.7	Total	485.1	592.3	525.0

^aAlabama Mesonet Weather Data.
^b1999–2009 means. Data not available prior to these years.