TY  - JA
AU  - Seymour,R.M.
AU  - Evans,R.O.
AU  - Skaggs,R.W.
TI  - Predicting corn yield response to planting date delay
SN  - 0001-2351
U1  - 93-022162 
PY  - 1992///
KW  - America
KW  - Appalachian states usa
KW  - Crop husbandry
KW  - Drainage
KW  - Gramineae
KW  - Mathematical models
KW  - Methods
KW  - Models
KW  - North America
KW  - Southern states usa
KW  - Time
KW  - Timing
KW  - USA
KW  - Zea
KW  - Yields
KW  - AGROVOC
N1  - references. Literature review US (DNAL 290.9 AM32T)
N2  - A two-year field study was conducted to determine the effect of delay in planting on corn yield in eastern North Carolina. The relationship between yield and planting date is needed in order to quantify the effects of trafficability, as influenced by drainage system design, on yield. Corn was planted on drained and subirrigated plots at planting dates ranging from mid-March to early June. Results indicated that yield decreased with planting date delay after 10 April. Results were in general agreement with those in earlier unirrigated experiments. The relationship between relative yield, Y, and planting date delay, D (days), beyond 10 April could be described by a piecewise linear relationship: Y = 1.0 - 0.0088 D, for D < 40; and Y = 1.3 - 0.0162 D, for 40 less than or equal to D < 80. Similar relationships were derived from data published in the literature for eight other locations. Although there were differences in the threshold date beyond which yields decreased with delay in planting, the equation parameters fell within a relatively small range for most locations. These relationships can be used in the water management simulation model, DRAINMOD, to predict the effect of drainage design on planting delay and relative yield
T2  - Transactions of the ASAE (USA). (May-Jun 1992). v. 35(3) p. 865-869
ER  -