Agriculture Reference
In-Depth Information
Figure 11.8
. Determination of nitrate (NO
3
-
) leaching losses from MCSE systems. Modeled
water drainage (A) was combined with NO
3
-
concentrations measured at 1.2 m during peri-
ods of drainage to estimate mean annual NO
3
-
leaching losses (B) over an 11-year period.
Volume-weighted mean NO
3
-
concentrations in drainage water (C) were calculated from
the total fluxes and drainage over the 11 years. Means of 100-150 water samples from three
replicate plots in each system. The 11-year period from 1995-2006 spanned 3.5 full rotations
(corn-soybean-wheat) of the annual cropping systems. Data from Syswerda et al. (2012).
