. Behavior of cotton planted at different dates in weevil-control experiments in Texas and South Carolina. Boll weevil; Cotton; Cotton. 4 BULLETIN 1320, U. S. DEPARTMENT OF AGRICULTURE 200 feet in length and were spaced feet apart. The location of this test with relation to other cotton plantings on "the experiment farm is shown in Figure 1, and the planting diagram of the test is shown in Figure 2. Conditions were favorable for the germination of the seed in the first three plantings, and good stands were obtained. Dry weather, following rains which occurred during the last week in A
. Behavior of cotton planted at different dates in weevil-control experiments in Texas and South Carolina. Boll weevil; Cotton; Cotton. 4 BULLETIN 1320, U. S. DEPARTMENT OF AGRICULTURE 200 feet in length and were spaced feet apart. The location of this test with relation to other cotton plantings on "the experiment farm is shown in Figure 1, and the planting diagram of the test is shown in Figure 2. Conditions were favorable for the germination of the seed in the first three plantings, and good stands were obtained. Dry weather, following rains which occurred during the last week in April, dried out the soil to a considerable depth, and a stand of about 30 per cent resulted from the planting of May 12, the remainder of the seed lying in the ground until germinated by a rain on May 30. The seedlings produced from the seed that germinated first grew rapidly and pro- duced vigorous plants. The moisture supply in the surface soil was inadequate to support growth of the seeds that germinated late, and most of the resulting seedlings died or remained stunted throughout the FlG. 1.—Diagram of part of the United States San Antonio Field Station, showing the location of successive plantings and the separate late-planting test of cotton with relation to other cotton plantings The first three plantings were thinned to two plants in a hill with the hills 12 inches apart. Thinning was done by hand in order to obtain as regular spacing as possible. The fourth planting was not thinned, as the poor stand rendered this unnecessary. The April 19, April 28, and May 5 plantings were thinned on May 25, June 4, and June 8, respectively. At the time of thinning, the plants in the first two plantings had from five to seven true leaves and averaged about 20 centimeters in height. The plants in the third planting were slightly larger when thinning was done, averaging centimeters in height and having from six to eight true leaves. GROWTH RATE OF SEEDLINGS In order to
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