000			02631nab a22003017a 4500
001			G69500
003			MX-TxCIM
005			20230601171434.0
008			121211b |||p||p||||||| |z||| |
022			_a0073-2230
024			_2https://doi.org/10.3733/hilg.v04n04p113
040			_aMX-TxCIM
041			_aeng
090			_aREP-386
100	1		_aConrad, J.C. _930904
245	1	0	_aRoot development and soil moisture
260			_c1929. _aOakland, CA (USA) : _bUniversity of California Division of Agriculture and Natural Resources,
340			_aPrinted
520			_aThe root development of plants and its relation to the amount and availability of soil moisture have been the subject of much study and speculation. Observations in California have yielded results which differ from conclusions drawn from some studies of similar nature elsewhere. Climatic conditions prevalent in California afford excellent opportunity for such study because the effective rainfall occurs almost entirely during the winter months and because soil-moisture conditions during a summer growing season are, in consequence, largely under control. Where the water table is far from the surface, experiments in California(14) have shown that the capillary movement of moisture is too slow to meet the needs of growing plants. Naturally then, roots must extend into a body of soil to utilize its moisture. Under these conditions, furthermore, direct evaporation causes material loss of moisture from only shallow depths of the soil, and moisture below 8 inches is lost by evaporation at an extremely slow rate, while plant transpiration accounts for the greater part of the water loss below this depth. It was, therefore, suggested(14) that the results of soil-moisture determinations, if made on adequate samples properly timed, would indicate the presence or absence of roots of plants growing on the soil. With soil previously wet, relatively dry soil below the surface layer would indicate the presence of roots. This paper presents some data in support of this suggestion. While it has to do with the development of the roots of grain-sorghum plants in relation to soil moisture, it is thought that the results obtained justify wider application.
546			_aText in English
595			_aRPC
650		7	_2AGROVOC _91755 _aRoots
650		7	_2AGROVOC _99061 _aSoil Water Content
650		7	_2AGROVOC _94199 _aPlants
700	1		_aVeihmeyer, F.J. _930905
773	0		_tHilgardia _gv. 4, no. 4, p. 113-134 _dOakland, CA (USA) : University of California Division of Agriculture and Natural Resources, 1929 _wG445482 _x0073-2230
942			_cJA _2ddc
999			_c20118 _d20118