000			02112nab a22002657a 4500
001			G72181
003			MX-TxCIM
005			20230721223030.0
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040			_aMX-TxCIM
041			_aeng
090			_aREP-344
100	1		_aCollins, G.N. _930752
245	1	0	_aA drought resisting adaptation in seedlings of hopi maize
260			_c1914. _aUSA : _bUSDA publications,
340			_aPrinted
520			_aA study of the maize grown by the Hopi, Zuni, and Navajo Indians of New Mexico and Arizona has brought to light an adaptive character that promises to be of economic importance in dry regions where germination is uncertain. These southwestern Indians have preserved from pre-Columbian times a type of maize able to produce fair crops in regions where the better known varieties of the East fail for lack of sufficient water. An important factor in the drought resistance of this type of corn is its ability to force the growing shoot of the seedling to the surface of the soil when planted at a depth of a foot or more. At such depths less specialized varieties die before reaching the surface. The literature of corn contains reports of many experiments conducted to determine the proper depth of planting, but the results are confusing and contradictory. It has generally been realized that the optimum depth is influenced by differences in soil and climate, but that the proper depth might vary with different varieties seems not to have been appreciated. The experiments referred to later, as well as many unpublished data showing the varying behavior of types when planted at different depths, indicate that it is unsafe and unscientific to generalize with respect to cultural factors without taking type, varietal, and even individual differences into account.
546			_aText in English
595			_aRPC
650		7	_2AGROVOC _93104 _aDrought resistance
650		7	_2AGROVOC _95415 _aSeedlings
650		7	_2AGROVOC _91173 _aMaize
773	0		_tJournal of Agricultural Research _gv. 1, no. 4, p. 293-302 _dUSA : USDA publications, 1914
942			_cJA _2ddc
999			_c21323 _d21323