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Showing items 1 through 9 of 542.
  1. Library Resource
    Journal Articles & Books
    December, 1991
    Nigeria, Africa, Western Africa

    In agriculture, surveying is required to prepare topographical maps that indicate variations in the level of the land's surface. Topographical maps are necessary as a base for the preparation of research station maps which include layout of field, buildings, roads, and soil conservation measures.

  2. Library Resource
    Journal Articles & Books
    December, 1985
    Colombia, Central America, South America

    The factors influencing the size and shape of exptl. field plots (area of exptl. lot, soil types, trial objective, no. of replicates, and degree of accuracy and homogeneity of the exptl. material) for the execution of field expt. are discussed. The basic principles of the following different methods to determine plot size are described: max. curve method, method of Koch and Rigney, Hatheway's method, and the max. curve method using the multiple linear regression model. Some considerations are presented on the border effect and on plot size in bush and climbing bean trials.

  3. Library Resource
    Reports & Research
    December, 1990

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