The Eleventh Regional Wheat Workshop For Eastern ... - Cimmyt

Impact ofcropping sequence and fertilizer application on soil parameters - Kamwaga et al.
Table 3. Soil organic matter (OM), P, N03 and pH as influenced by cropping sequence measured post-harvest 1994 at Njoro, Kenya.
Crop rotation Parameter
Treatment 1992 1993 1994 OM P N03 pH
(%) (ppm) . (ppm)
1 RP W W 3.86 23.3 25.9 defg 6.2
2 W W RP 3.46 23.9 23.0 g 6.2
3 W RP W 3.37 24.2 24.2 fg 6.3
4 SOY W W 3.88 23.4 25.2 defg 6.2
5 W W SOY 3.92 21.8 27.0 edef 6.2
6 W SOY W 3.91 25.6 26.5 edef 6.4
7 POT W W 3.56 26.7 27.7 bed 6.4
8 W W POT 3.12 26.3 31.6 a 6.3
9 W POT W 3.18 23.4 26.6 edef 6.3
10 MAZ W W 3.23 21.8 26.2 edef 6.3
11 W W MAZ 4.08 21.7 24.4 fg 6.2
12 W MAZ W 3.55 22.8 26.7 edef 6.3
13 MAZ POT W 3.71 22.7 29.3 abc 6.2
14 POT W MAZ 3.57 22.3 27.6 bede 6.3
15 W MAZ POT 3.83 25.0 30.3 ab 6.2
16 W W W 3.74 23.4 24.5 efg 6.3
Grand mean ---­ -­
3.62 23.6 26.7 6.3
LSD(0.05) NS NS 3.12 NS
C.V.(%) 10.8 18.0 9.8 1.45
Within a column, values followed by the same letter(s) are not significantly different at the 5% level of the LSD test.
RP = Rapeseed; SOY = Soybean; POT = potato; MAZ = Maize; W = Wheat.
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