Agriculture Reference
In-Depth Information
TABLE 9.12
Changes in Stocks of Soil Organic Matter in 0-20 cm Layer for Crop Rotation with Different Systems of Fertilization and
Soil Tillage
Rotation with Alfalfa and Perennial Grasses
Rotation without Alfalfa and Perennial Grasses
Minimum Tillage + Plowing
Minimum Tillage
Minimum Tillage + Plowing
Minimum Tillage
Manure +
NPK
Manure +
NPK
Manure +
NPK
Manure +
NPK
LSD
05
,
t/ha
Year
Unfertilized
Unfertilized
Unfertilized
Unfertilized
1999
101.8
98.6
94.8
98.2
94.8
97.2
95.0
100.8
2.9
2009
95.3
108.2
99.1
105.8
94.6
100.6
97.7
105.1
3.1
Difference
−6.5
+9.6
+4.3
+7.6
−0.2
+3.4
+2.7
+4.3
Rate of increase of
SOM, Mg/ha/year
−0.650
+0.960
+0.960
+0.760
−0.02
+0.340
+0.270
+0.430
