Yield and yield attributes
The present study investigated the growth and yield attributing characters of tomato to different level of irrigation with tillage (Table 1). Among the different treatment maximum number of fruits/ plant (49.79 nos) was observed under treatment T
8 and which was found to be at par with T
7. The maximum fruit weight (61.77 gm) was also observed under T
8. The fruit yield data was significantly influenced by different salt and sweet water treatment. Application of blending of saline and sweet water in pitcher pot for pitcher irrigation with different type of tillage caused to increase tomato yield along with yield attributes than (T
3). (T
8) found to be most effective in increasing number of fruit/plant, length of fruit, diameter of fruit, weight of fruit and tomato yield than the other treatments. Variations in results of yields and yield attributes of tomato due to application irrigation water with different tillage may be attributes to the variations of favorable soil condition mainly decreased soil salinity more precisely by the increasing availability of nutrients in soils. Similar finding was reported by
Tesfaye et al., (2011) and
Mondal et al., (1983). According to
Setiawan et al., (1998) the pitcher irrigation system utilizes a bottle-like emitter made of baked clay, sand and ash. Water level is maintained constant inside the pitcher and permeates the pitcher wall to supply crops in the surrounding soil. The system has been applied successfully to horticultural products such as chilies, tomatoes in field condition.
Kumari et al., (2012) reported that effect of drip irrigation levels and mulches on growth, yield and water use efficiency of tomato was significantly increased over control.
Bulk density, porosity and water holding capacity
The applicability of these results are then tested on various physical properties in soil due to application of pitcher irrigation with different type of tillage are presented in (Table 2). At each of the pitcher irrigation treatment the values of bulk density found to decrease over control (T3). Bulk density showed to change with the following order (T
2)>(T
8)>(T
1)>(T
7) >(T
6)>(T
5)>(T
4)>(T
3). Decrease of bulk density over the year may be indicative to better results in subsequent year due to application of different type of tillage with blending of saline and sweet water in pitcher pot for pitcher irrigation. Decrease of bulk density may be due to higher organic carbon content in soil. The findings of
Hangarge et al., (2002) showed that application of organic wastes and organic manures in the form of FYM reduced the bulk density finds conformity of the results of the present investigation. The results of porosity showed reverse trend of bulk density as it increases due to application of each treatments over control. Highest values are observed in (T
2) under tomato and every year (Table 2). Increase of porosity may be due to higher organic carbon content in soil decrease bulk density due to more space and better soil aggregation. Such variations of results on porosity resembles with the observations of
Choudhury et al., (1985) and
Orji and Eke (2018). The water holding capacity in soil also shows to vary significantly with the application of blending of saline and sweet water in pitcher pot for pitcher irrigation with different type of tillage in the both years. Data have the tendency of slight increase in the subsequent years due to application of different type of tillage. Increase of water holding capacity may be due to higher organic carbon content in soil. The investigations reported by
Bhattacharya et al., (2004) that the views that the application of organic manures helped to increase the water holding capacity of soil over control.
Soil pH, EC and organic carbon
The results of the experiment found clear support for the soil chemical properties like pH and EC shows to vary significant with the application of blending of saline and sweet water in pitcher pot for pitcher irrigation with different type of tillage (Table 3). At each of the pitcher with tillage treatment the values of pH and EC found to decrease over control (T
3). Lowest value is observed in sweet water + Mulch tillage (T
2). The data have the tendency of slight decrease in the subsequent years due to application of different type of tillage. Decrease of EC means lowering the salt concentration in soil.
Bhingardeve et al., (2006) studied the influence of saline, canal water and fertilizer level through drip irrigation on pH, EC of soil and plant height at different growth stages of brinjal. The organic carbon content in soil shows much variation with pitcher irrigation and different type of tillage. The data also showed variation due to application treatment for each of the year, however, the performances of organic carbon were much better in the second year for each of the treatments (Table 3). Highest organic carbon was recorded in plots received in (T
2). Similar options are also available from the results
Himabindu et al., (2019) and
Adhikary et al., (2020).
Available soil nutrients
The results on the effects of pitcher irrigation with different type of tillage on the changes of availabilities of nitrogen, phosphorus and potassium after harvesting of crops every year are presented in (Table 4). Availability of nitrogen, phosphorus and potassium found more in the soils received T
3 than the other treatments. Highest availability of nitrogen, phosphorus and potassium was recorded in T
8. The available nitrogen significantly increased with the application of each of the different types of pitcher irrigation over control (T
3). Increase of phosphorus content in soils over control (T
3) due to each treatment were15.19 kg/ha, 15.09 kg/ha, 13.66 kg/ha, 11.49 kg/ha, 9.80 kg/ha, 9.58 kg/ha, 3.19 kg/ha respectively in T
8, T
7, T
2, T
6, T
5, T
1, T
4. The available K ranged between 153-388 kg/ha. The potassium availability in soil over control (T
3) were 134.34 kg/ha 132.88 kg/ha,108.89 kg/ha, 77.48kg/ha, 42.38 kg/ha, 22.13 kg/ha,16.03 kg/ha respectively due to (T
8), (T
7), (T
2), (T
1), (T
6), (T
5) and (T
4). The data further reveals that application of pitcher irrigation with different type of tillage markedly increases the availability of N, P and K over control (T
3). The results are similar with the findings of
Singh et al., (2012), Yihenew et al., (2015) and
Pal et al., (2020).