Soil type. . . . Group IV Tunica clay
Groups V-VII Sharkey clay
Soil pH. . . . . 7.1
Soil fertility . P--high, K--high+
Fertilizer added None
Herbicide application. . Group IV Command (4EC) ppi @ 1.0 qt/a
Classic @ 0.5 oz/a over the
top (early planted, I & NI)
Basagran @ 1 qt/a (late planted)
Groups V-VII Roundup @ 40 oz/a
Command @ 1 qt/a ppi
Basagran @ 1 qt/a
Basagran @ 1 qt/a
Irrigation . . . 3.0 inches week of July 8 (furrow applied, Groups IV-VII)
3.0 inches week of August 15 (furrow applied, Groups IV-VII)
3.0 inches week of August 25 (furrow applied, Group IV)
3.0 inches week of August 29 (furrow applied, Groups V-VII)
Planting date. . Group IV (Irrigated [I] and Nonirrigated [NI]) 4/21/94
Group IV Late Planted (I) 5/17/94
Groups V-VII (I) and (NI) 5/12/94
Harvest date . . Group IV Early Planted, Early Maturing (I and NI) 9/13/94
Group IV Early Planted, Late Maturing (I and NI) 9/22/94
Group IV Late Planted, Early Maturing (I) 9/22/94
Group IV Late Planted, Late Maturing (I) 9/28/94
Group V (NI) 9/30/94
Group V (I) 10/05/94
Groups VI-VII (I and NI) 11/02/94
Soil conditions were very good at planting time for all soybean variety tests. Each test emerged and was well established prior to any large rainfall events, which greatly reduced the potential for seedling diseases. An irrigation attempt on June 29 was rained out. The first complete irrigation was made on July 8. The 12-day period following the first irrigation had a total of 7.71 inches of rain. The unusually wet July was followed by a near record dry August. Effects of weather extremes in July and August are reflected in yield averages. Nonirrigated yield averages are greater than irrigated for maturity group IV tests. Cultivars in these tests were in mid-to-late pod fill in August. Maturity Groups V, VI, and VII cultivars were in bloom-to-early pod fill in August and nonirrigated yields are much lower than irrigated yields.
Inches
April. . . . 3.48
May. . . . . 5.12
June . . . . 1.98
July . . . . 11.58
August . . . 0.45
September. . 1.14
October. . . 7.52
------
Total. . . . 31.27
Table 1A. Maturity Group IV Early Planted, Early Maturing Irrigated
Table 1B. Maturity Group IV Early Planted, Late Maturing Irrigated
Table 1C. Maturity Group IV Early Planted, Early Maturing Non-Irrigated
Table 1D. Maturity Group IV Early Planted, Late Maturing Non-Irrigated
Table 1E. Maturity Group IV Late Planted, Early Maturing Irrigated
Table 1F. Maturity Group IV Late PLanted, Late Maturing Irrigated
Table 1G. Maturity Group V Irrigated
Table 1H. Maturity Group V Non-Irrigated
Table 1I. Maturity Group VI Irrigated
Table 1J. Maturity Group VI Non-Irrigated