C -5PM ~ Nelson and Ash took surface soil samples, coconut fronds and y readings alone coconut rows 24 and 34 from the center base line to the 2nd base line south. Samples were taken at every 15th coconut tree, starting with the tree south of the center base line or lst BLS. ‘These samples were composited for four areas as follows: #1. Center base line to lst BLS — Row 24. #3. #4. Center BL to lst BLS - Row 34 Ist BLS to 2nd BLS ~ Row 34 #2. 1st BLS to 2nd BLS ~ Row 24 The row numbers are the numbers given to the original rows of coconut trees and are those used in reports of the 1969-70 and 1972 surveys. A row of coconut trecs has since been planted hetween the original rows of trees. Nelson and Ash began a gamma survey of the houses. 12 April (Friday) - Bikini Island AM - Ash continued gamma survey of houses. Nelson had a backhoe operator dig three soil pits in the following areas: #1. Ten yards south of the center base line and 30 yards inland from the first house south of the center base line. This pit is about 8 feet from a Parndanus tree from which fruit and leaves were collected. This pit had a mixture of dark organic soil and coral gravel to a depth of about 100 cm, and coral sand below 100 cm. #2. Ten yards south of the center base line on Row 24. This pit had a #3. Five yards north of lst Base line south on Row 24. This pit had fine mixture of black organic soil and coral gravel from 0-30 cm, black organic soil and coral sand from 30-75 cm, and coral sand below 75 cm. dark organic soil from 0-35 em, light gray coral sand from 35-50 cm, lighter shade of coral sand from 50-75 cm and whife coral sand below about 75 cm. Soil samples were taken by side wall sampling from these three soil pits at the following intervals, in cm, 0-2.5, 2.5-5, 5-19, 10-15, 15-25, 25-35, 35-50, 50-75, 75-100, 100+. These intervals varied in some cases, due to differences in soil horizons between the pits. L_] Sumter tt Line Row 3Y XX KK KY KKK KR Ke Ox Ke KK k Pandan LS @ Soil Pit _ | CHoace lo LageonRewd__| (>? Base Center Base bin Soil Pit #pD | Red wi ny TJ Fad Scout} KM KK KX We AMX&w KM Po w Aa xx BES