Abstract
An on-farm experiment was conducted at the farmer's field located at the Durbachara village of Gauriopur upazilla under the Mymensingh district of Bangladesh from November 2015 to March 2016 to study the effect of seed rate on yield performance of wheat under strip tillage. Wheat cv. BARI Gom-26 was sown under conventional tillage (CT) vs. strip tillage (ST), including four seeding rates viz. 100, 110, 120, and 130 kg ha-1. The CT was done with a two-wheel tractor and consisted of two primary tillages followed by two secondary tillages. The ST was done using a Versatile Multi-crop Planter (VMP) machine in a single pass process. A pre-plant herbicide, glyphosate was applied 3 days before of ST operation @ 3.7 L ha-1. The experiment was laid out in a randomized complete block design with four replications. The impact of tillage methods on the seed rate was found significant in the yield and economic profit of wheat. The longest spike with the highest number of grains spike-1, the highest weight of 1000-grain, grain yield, and BCR was recorded when 120 kg seeds of wheat sown with strip tillage. This practice produced a 25% higher yield and earned 51% higher profit than the practice of seeding 100 kg seeds ha-1 with conventional tillage. SAARC J. Agric., 19(1): 45-56 (2021)
Highlights
Tillage is the mechanical manipulation of soil and plant debris that facilitates crop planting
The interaction effect of tillage practices under different seed rate exerted a significant effect on all the plant characters (Table 1 and Table 2), except plant height, number spikelet spike-1 and straw yield
Plant population m-2 Data reveal that the highest plant population m-2 area was recorded from ST seeded 130 kg seed ha-1 followed by ST with 120 kg seed, conventional tillage (CT) with 130 and 120 kg ha-1 seed, and ST with 110 kg seed ha-1 (Table 1)
Summary
Tillage is the mechanical manipulation of soil and plant debris that facilitates crop planting. Strip-tillage (ST) has the potential to delay the degradation of plant residues and reduce the release of mineralized inorganic sources of plant nutrients into the soil through preserving optimum soil moisture content (Kassam et al, 2009). During this era of global crisis, it is high time avoiding power tiller-based CT, and minimum tillage based on reduced soil disturbance under striptillage can be a new method for maximizing crop yields in global agriculture, with economic and environmental benefits. The on-farm study examined the efficiency of the wheat in the strip tillage method and determined the optimum seed rate to achieve maximum yield
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