Research Article
Effect of Tillage, Irrigation, and Nutrient Levels on Growth and Yield of Sweet Potato in Rice Fallow
Table 9
Effect of different treatments on consumptive use of water by sweet potato in rice fallow during 2008-2009.
| | Treatment | Moisture contribution from profile storage (mm) | Evaporation (mm) | Effective rainfall (mm) | Consumptive use (mm) | Water use efficiency (kg mm−1) | | 0–15 cm | 15–30 cm | 30–45 cm | 45–60 cm | Total |
| | Method of tillage | | | | | | | | | | | Minimum tillage | 39.1 | 33.9 | 33.3 | 28.9 | 135.2 | 26.7 | 5.9 | 167.8 | 55.7 | | (28.9)* | (25.1) | (24.6) | (21.4) | (100.0) | | | | | | Conventional | 34.9 | 31.7 | 30.5 | 28.5 | 125.7 | 25.2 | 5.9 | 156.8 | 77.5 | | (27.8) | (25.2) | (24.3) | (22.7) | (100.0) | | | | | | LSD () | — | — | — | — | — | — | — | 11.0 | 3.7 |
| | No. of irrigation | | | | | | | | | | | 3 | 25.1 | 24.9 | 24.5 | 22.2 | 96.7 | 14.8 | 5.9 | 117.4 | 71.2 | | (26.0) | (25.7) | (25.3) | (23.0) | (100.0) | | | | | | 5 | 34.5 | 33.1 | 32.2 | 28.5 | 128.3 | 24.6 | 5.9 | 158.8 | 67.6 | | (26.9) | (25.8) | (25.1) | (22.2) | (100.0) | | | | | | 7 | 45.2 | 43.6 | 40.9 | 36.6 | 166.3 | 38.6 | 5.9 | 210.8 | 60.8 | | (27.2) | (26.2) | (24.6) | (22.0) | (100.0) | | | | | | LSD () | — | — | — | — | — | — | — | 4.7 | 2.8 |
| | Nutrient levels (kg ha−1) | | | | | | | | | | | 0-0-0 | 32.2 | 31.4 | 30.9 | 27.8 | 122.3 | 26.0 | 5.9 | 154.2 | 60.0 | | (26.3) | (25.7) | (25.3) | (22.7) | (100.0) | | | | | | 37.5-25-37.5 | 34.7 | 33.8 | 32.9 | 29.6 | 131.1 | 26.0 | 5.9 | 163.0 | 66.7 | | (26.5) | (25.8) | (25.1) | (22.6) | (100.0) | | | | | | 75-50-75 | 37.5 | 36.3 | 35.0 | 29.1 | 137.9 | 26.0 | 5.9 | 169.8 | 73.0 | | (27.2) | (26.3) | (25.4) | (21.1) | (100.0) | | | | | | LSD () | — | — | — | — | — | — | — | 2.8 | 1.7 |
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*Percentage values are given within parentheses.
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