Degraded Land Hybridization with Tank Silt: Impact on Soil Quality and Productivity of Soybean

Abstract

The study was taken on very shallow skeletal soil underlined by saprolite in basaltic area and applied tank silt @ 0, 500, 1000, 1500, 3000, 4500 and 6000 cu m/ha (approximately 0, 5, 10, 15, 30, 45 and 60 cm thick layer). These soils are characterized as very shallow in depth, sandy clay loam in texture and has low cation exchange capacity (<20 cmol(p+)/kg). The applied tank silt was alkaline in nature, had high clay content (>60%), high cation exchange capacity (>65cmol (p+)/kg) and was highly calcareous in nature (>16%). The study indicated wide variability in morphological, physical, and chemical properties of soil after three years of application and had positive impact on yield of soybean. The colour of surface layer (Ap horizons) of this hybridized soil varied from 10 YR 3/2 to 10 YR 4/2, modified to clayey in texture from sandy clay loam and sub-angular blocky to angular blocky in structure. The clay content, moisture content and CEC increased while hydraulic conductivity decreased with increase in level of tank silt application. The yield of soybean increased up to 15 cm depth of tank silt application and later decreased. The maximum yield of soybean was recorded with 1500 cu m/ha of application (31.4 q/ ha) corresponding to 15 cm depth, which was threefold higher over no application (9.6 q//ha).

Greenhouse gases emissions and agronomic productivity as influenced by varying levels of N fertilizer and tank silt in degraded semiaridAlfisol of Southern India

“…TS treatment had positively related to grain and straw yield of maize ( r = 0.16 and r = 0.14, respectively). Application of TS up to 15 cm soil depth increased the yield of soybean (Vaidya & Dhawan, 2015). Emission trend of cCO 2 during the entire period of the experiment was influenced by TS application treatment ( r = 0.47), wherein, reduced cN 2 O emission ( r = −0.04) was observed with TS application.…”

Nature‐based solutions in soil restoration for improving agricultural productivity

“…Application of tank silt to agricultural fields is called ‘soil hybridization.’ Soil hybridization with tank silt improves soil physicochemical properties which favour optimum crop growth and higher yields (Vaidya & Dhawan, 2015; Figure 5). The excavated tank silt is characterized by dark colour and lighter weight per unit volume and it contains a rich nutrient base and a good amount of humified organic matter (Dey et al, 2019).…”

“…The excavated tank silt is characterized by dark colour and lighter weight per unit volume and it contains a rich nutrient base and a good amount of humified organic matter (Dey et al, 2019). An increase in soil clay content is also observed following tank silt application (Vaidya & Dhawan, 2015; Wadne et al, 2020) and this may be due to higher clay content and in‐situ translocation of clay particles through the eluviation process (Vaidya & Dhawan, 2015). This indicates that the more the application of tank silt, the higher the amount of clay content in the treated soil (Vaidya & Dhawan, 2015; Wadne et al, 2020).…”

“…An increase in soil clay content is also observed following tank silt application (Vaidya & Dhawan, 2015; Wadne et al, 2020) and this may be due to higher clay content and in‐situ translocation of clay particles through the eluviation process (Vaidya & Dhawan, 2015). This indicates that the more the application of tank silt, the higher the amount of clay content in the treated soil (Vaidya & Dhawan, 2015; Wadne et al, 2020). Tank silt application enhances crop yields and brings out the dynamic changes in the soil on a sustainable basis (Sreenivasan & Kumar, 2004).…”