Effect of Nitrogen Rate, Timing, Placement, and Catch Crops on Yield and Nitrogen Utilization in Vegetable Crops


  • To evaluate the effect of several rates of applied N, as affected by timing and method of placement, on the yield of broccoli.
  • To determine the time of maximum broccoli uptake of applied N.
  • To determine how much of the applied N remains in the soil as nitrate at harvest and following winter rainfall.
  • To evaluate the efficiency of a winter cover/catch crop in capturing residual nitrate N.