Innovations in Dryland Agriculture

434

(a)

Residue mass, kg ha

-1

0

2

4

6

8

NT

CT

(b)

Residue ev

aporative

resistance, s

m

-1

0

100

200

300

400

500

NT

CT

(c)

Year

1992 1994 1996199820002002

Soil evaporation, cm day

-1

0.0

0.5

1.0

1.5

2.0

CT

NT

Fig. 7 RZWQM simulations of residue dynamics and residue effects on (a) flat residue mass on
the soil surface, (b) residue evaporative resistance, and (c) potential soil evaporation in conven-
tional till (CT) and no-till (NT) wheat-fallow cropping systems

N.C. Hansen et al.