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Thesis (M.S)—University of Nebraska—Lincoln, 1970. Department of Agricultural Engineering.


Copyright 1970, the author. Used by permission.


Corn is one of the most important crops in Colombian agriculture. The corn produced is mainly utilized for food purposes along with beans, plantano, rice, and potatoes.

Because of the high cost, sprinkler irrigation is not frequently used to supply the moisture for the seed germination. Then, a more efficient use of the low soil moisture, application of water at planting time or irrigation by gravity could be the solution in order to obtain a uniform stand required for high yields.

The successful use of different methods of minimum tillage and different bed shapes in the United States indicates that these methods could be used successfully in some areas of the tropical zone.

The objective of this study was to determine the effects of several alternative tillage systems on growth relationships and production of corn.

This initial study of planting in dry soil involved the evaluation of five systems along with the effects of applying fertilizer or water at the time of planting. Alternative systems studied were: (1) Till-plant, (2) Disk and till-plant, (3) Plow and surface plant, (4) Chisel and till-plant, and (5) Plow and plateau plant.

Evaluation of the performance of the alternative systems was based upon measures of corn growth and production. The criteria used were: (1) Plant emergence, (2) Tasseling time, (3) Kernel moisture at harvest, and (4) Shelled corn yields at 15.5% moisture content.

Advisor: Howard D. Wittmuss