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Accuracy of the Percentage of Lint Cotton Determined on Small Laboratory Gins 1
Author(s) -
Vantine J. T.
Publication year - 1934
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1934.00021962002600060013x
Subject(s) - lint , citation , agricultural experiment station , library science , mathematics , computer science , agricultural science , agriculture , geography , environmental science , archaeology , programming language
The yield of cotton in field experiments usually is reported in pounds of lint per acre, the yield being computed from the percentage of lint obtained on small laboratory gins. The accuracy of the percentage of lint is of considerable importance because it is a basic figure used in calculating yields. Since small plats are used in field experiments, errors would be magnified when the yield of lint is calculated to the acre basis. The purpose of this study was to determine the amount of seed cotton required to obtain accurate results when cotton is ginned on an 8-saw and on a 2o-saw laboratory gin at the main Experiment Station Farm, College Station, Texas. Quinby and Stephens made studies of methods of taking samples and the accuracy of the lint percentage determined from cotton ginned on small laboratory gins. They found that a to-pound sample ginned on a ao-saw gin had a probable error of o. 18% lint and that a 2oo-gram sample ginned on an 8-saw gin had a probable error of °-37%The difference in the percentage of lint determined by the two sizes of samples was significant. They report that the difference in percentage of lint of cotton picked at different dates was significant and that it was necessary to get a representative sample from the total produce of the plat in order to secure a reliable percentage of lint. They found that the probable error of a single replicate was 0.28% lint which was almost the same as the probable error of a single sample drawn from a bulk lot of thoroughly mixed seed cotton. They concluded that one xo-pound sample from one plat of a replicated test is probably accurate enough to determine the percentage of lint where the soil is reasonably uniform.