Evaluation of Two Irrigation Scheduling Methods and Nitrogen Rates on Corn Production in Alabama

Table 2

Field capacity, permanent wilting point, plant available water, water depletion, and 35% depletion of plant available water in water content and soil matric potential units for each soil depth at TVREC in 2014. Parameters from 2014 were used during both growing seasons.

Depth (cm)	0–15	15–30	30–60
Field capacity (FC)^ǂ	0.1481	0.3115	0.3478
Permanent wilting point (PWP)^§	0.0921	0.1517	0.1806
Plant available water (PAW)^¶	0.056	0.1598	0.1672
Water depletion (35%) (cm^3/cm^3)^£	0.0196	0.0559	0.0585
35% of PAW (cm^3/cm^3)^¤	0.1285	0.2555	0.2892
35 % of PAW (kPa)^¥	70	80	83

^ǂ(cm³ cm³), ^§(cm³ cm³), ^¶PAW = FC − PWP, ^£water depletion (35%) = PAW, ^∗0.35–35% was the soil water depletion selected in the study, ^¤35% of PAW (cm³ cm³) = PAW − water depletion (35%), and ^¥35% of PAW (kPa) = soil matric potential referred to the depletion of 35% of PAW.