Table 5. Corn ear leaf area affected by rye-tillage management
and N fertilizer. (Average of five ear leaves)
 Nitrogen level (kg/ha)
Management 0 67 134 201 268 Average
 ----- Square centimeter/5 leaves ------
CT-forage 2102 2864 3101 3208 3085 2872 v

CT-Green manure 1952 2802 2952 2974 3095 2755 v

NT-Mulch 2201 2691 2782 3047 3161 2776 v

NT-Forage 2047 2589 2609 2874 2777 2579 v

Fallow 1607 2750 2858 2926 3111 2658 v

LSD=135
Average 1982 c 2739 b 2860 b 3013 a 3046 a
CV=7.96%


CT-forage = Rye harvested for forage followed by conventional
tillage soil preparation. CT-Green manure = Rye turned under with
conventional tillage. NT-Forage = Rye harvested for forage
followed by direct seeding with in-row subsoil no-tillage planter.
NT-Mulch = Direct seeding in rye with in-row subsoil no-tillage
planter. Fallow = No winter cover crop, area kept clean tilled as
a control treatment. Values in rows within each management
treatment not followed by the same letter (a,b,c,d,e) are
significantly different at the 0.05 level of probability according
to LSD. Values in columns not followed by the same letter
(v,w,x,y,z) are significantly different according to Duncan's
multiple range test.


Corn ear leaf area affected by tillage
 rye management and N fertilizer

8.4
8.2-
2.4 -- -......
2.6 .

2

1.8 I -----


60 100 160
 Kg/ha Nitroge


200 260 300


- CT Forage CT Green Manure -- NT Mulch
-- NT Forage Fallow


Flgwu 4