ABSTRACT

A 2-year (2001-2002) study was conducted to evaluate the effect foliar nutrient applications on a Leeper silty clay loam soil testing high in P and K had on cotton lint gross returns and fiber quality. Slow release N (CoRoN®, 25-0-0), slow release N + K (CoRoN, 10-0-10, 0.5% B) liquid formulated solutions, and conventional foliar applications of Solubor [boron (20% B)], potassium nitrate (KNO₃) and feed grade urea (46% N) were applied either at pinhead square or sequential applications starting at pinhead square or first bloom. Sequential applications were applied at first bloom 9 and 13 days after first bloom applications in 2001 and 2002, respectively. The delay in the 2002 applications was due to wet soil conditions. Foliar applications were made with TXVS-4 nozzles on 20 inch spacing with water as the carrier at 5 gpa. Boom height was 20 inches above the cotton plants with a boom pressure of 32 psi.