SOYBEAN: Braxton soybean were planted 12 June in 6-row plots x

20-m with 0.76-m row spacing. Yield estimates were made by

harvesting 12-m of row from 2 rows. Plots were sprayed about 29

Sept with Asana 1.9 EC at 0.025 lb(AI)/A each year to control

stink bugs and about 1 Sept with Dimalin 25W at 0.5 oz (AI)/A

each year to control velvet bean caterpillar. Spray applications

were made at 36 psi and with 25 gal water/A. Soybean were not

fertilized. Soybean yields were corrected to 13% moisture.

CORN: Tropical corn: Pioneer hybrid brand X-304C (coded X304C)

was planted in 4-row plots in a moderate-energy-input system

defined as: 1. nitrogen fertilization at 120 lb N/A (20 lb/A

applied on the surface at planting and 100 lb/A side dressed when

the crop was 24 inches high in 1985 and changed to 12 inches high

for 1986, 1987-, 1988; and 2. no irrigation. X304C was planted

with a no-till planter in 24 foot rows with 30-inch spacing

between rows at a population density of 18,000 plants/A.

Tropical corn yields were corrected to 15.5% moisture.

 Temperate corn: Asgrow hybrid brand 5509 (coded A5509) was

planted in 4-row plots in a moderate-energy-input system

(described above) in 1988 to compare with the high-energy-input

system recommended in the Southeast and known as the plow-layer-

management system defined as; 1. Fertilizer applied for maximum

corn yields according to soil test results up to the rates of

300-100-300 lb/A of N-P-K; 2. irrigation as scheduled by

tensiometers placed at 6 inch depth reached 0.02 MPa. A5509 was

planted with a no-till planter in a prepared seedbed in 24 foot

rows with 30-inch spacing between rows at a population density of