Research Article
Effect of Tillage, Irrigation, and Nutrient Levels on Growth and Yield of Sweet Potato in Rice Fallow
Table 8
Effect of different treatments on consumptive use of water by sweet potato in rice fallow during 2007-2008.
| | 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 | 34.4 | 31.9 | 29.1 | 26.3 | 121.6 | 24.8 | 58.2 | 204.6 | 54.6 | | (28.3)* | (26.2) | (23.9) | (21.6) | (100.0) | | | | | | Conventional | 28.9 | 28.8 | 28.2 | 25.6 | 111.5 | 22.7 | 58.2 | 192.4 | 60.6 | | (25.9) | (25.8) | (25.3) | (23.0) | (100.0) | | | | | | LSD () | — | — | — | — | — | — | — | 13.5 | NS |
| | No. of irrigation | | | | | | | | | | | 3 | 21.7 | 21.5 | 21.4 | 19.5 | 84.1 | 14.4 | 58.2 | 156.7 | 59.5 | | (25.8) | (25.6) | (25.4) | (23.2) | (100.0) | | | | | | 5 | 29.0 | 31.1 | 29.0 | 24.3 | 113.4 | 23.5 | 58.2 | 195.1 | 59.5 | | (25.6) | (27.4) | (25.6) | (21.4) | (100.0) | | | | | | 7 | 40.1 | 40.8 | 39.1 | 32.3 | 152.3 | 33.4 | 58.2 | 243.9 | 53.8 | | (26.3) | (26.8) | (25.7) | (21.2) | (100.0) | | | | | | LSD () | — | — | — | — | — | — | — | 5.0 | 3.6 |
| | Nutrient levels (kg h−1) | | | | | | | | | | | 0-0-0 | 27.3 | 29.2 | 27.6 | 24.5 | 108.6 | 23.8 | 58.2 | 190.6 | 52.8 | | (25.1) | (26.9) | (25.4) | (22.6) | (100.0) | | | | | | 37.5-25-37.5 | 31.1 | 30.8 | 30.2 | 25.1 | 117.2 | 23.8 | 58.2 | 199.2 | 58.4 | | (26.5) | (26.3) | (25.8) | (21.4) | (100.0) | | | | | | 75-50-75 | 33.8 | 32.7 | 31.2 | 26.1 | 123.9 | 23.8 | 58.2 | 205.9 | 61.7 | | (27.3) | (26.4) | (25.2) | (21.1) | (100.0) | | | | | | LSD () | — | — | — | — | — | — | — | 3.4 | 2.4 |
|
|
*Percentage values are given within parentheses.
NS: Not significant.
|
