TY - JOUR TI - Water management using subsurface drains AU - Kriz, G. J. AU - Skaggs, R. W. T2 - Journal of Soil & Water Conservation DA - 1973/// PY - 1973/// VL - 28 IS - 5 SP - 216 ER - TY - JOUR TI - Land-forming designs for water management AU - Kriz, G. J. AU - Hunnings, L. D. AU - Sneed, R. E. AU - Shih, S. F. T2 - Journal of Soil & Water Conservation DA - 1973/// PY - 1973/// VL - 28 IS - 3 SP - 134 ER - TY - JOUR TI - PHOTOPERIODIC RESPONSES OF PEANUTS AU - WYNNE, JC AU - EMERY, DA AU - DOWNS, RJ T2 - CROP SCIENCE AB - In an initial experiment the response to photoperiod of six lines representing the two subspecies of Arachis hypogaea L. was measured under two long‐day and two short‐day photoperiodic treatments in the North Carolina State Unit of the Southeastern Environment Laboratories. All treatments were at constant day/night temperatures of 30/26 C for 64 days. Vegetative growth of the plants was reduced by shortday treatments. However, plants grown under short days produced more fruit than plants subjected to long‐day treatments. A second experiment tested the interactions of photoperiod with temperature and their effects on reproductive and vegetative characters of peanuts. Three lines of A. hypogaea were exposed to long and short days at 30/26, 26/22, and 22/18 C. Plants grown under short days were smaller in size but produced more fruit than plants grown under long days. The greater fruit production of plants grown under short days was not caused by differences in flowering intensity, but by factors that occurred after flowering. DA - 1973/// PY - 1973/// DO - 10.2135/cropsci1973.0011183X001300050006x VL - 13 IS - 5 SP - 511-514 SN - 0011-183X ER - TY - CHAP TI - Air pollution and the future of agricultural production AU - Heck, W. W. T2 - Air pollution damage to vegetation AB - Ozone and sulfur dioxide are presently the most pervasive air pollutants affecting agricultural production. They have a major impact on the growth and productivity of certain sensitive cultivated and native species of plants. These pollutants are a national problem around urban centers but are important in rural areas, particularly throughout the eastern United States. The present information base is too diffuse to permit an accurate prediction as to the eventual impact on agricultural production. Management practices would permit us to live with present pollution levels, but a decrease in these levels would be beneficial to agricultural production. Doubling of present levels in the eastern part of the country could result in major yield reductions of important agronomic crops. Long term chronic studies of field problems are essential before an accurate assessment of the impact of air pollutants on agricultural production can be developed. PY - 1973/// DO - 10.1021/ba-1973-0122.ch010 SP - 118 PB - Washington: American Chemical Society ER -