Early-bulking potato genotypes lift cropping intensity and whole-system returns in Bangladesh trial
A PLOS ONE field study reports that integrating early-bulking potato genotypes 7 Alu and Sagitta enabled four to five crops per year and sharply improved system-level productivity.
A new PLOS ONE study examined how early-bulking potato genotypes can redesign potato-based crop sequences under land pressure. The field experiment was conducted at the Regional Agricultural Research Station (RARS), Burirhat, Rangpur, Bangladesh, during the 2017-2018 season in AEZ-3 conditions. Researchers evaluated 13 cropping patterns, including the conventional potato-boro rice-T. aman rice baseline, using a randomized complete block design with three replications.
The operational premise was that early potato harvest creates calendar space for additional short-duration crops. In the improved patterns, that allowed four to five crops per year instead of the traditional three-crop sequence. At system scale, the gains were substantial: potato equivalent yield increased by 43.8% to 111.5% compared with the existing pattern.
The highest potato equivalent yield, 95.37 t/ha, was reported for the pattern 7 Alu-cardinal-mungbean-red amaranth-T. aman rice. The top land-use efficiency, 95.61%, and the strongest whole-pattern gross margin, Tk. 538,775 per hectare, together with MBCR 8.17, were achieved in the 7 Alu-garden pea-red amaranth-T. aus rice-T. aman rice sequence. By contrast, the conventional pattern delivered a much lower whole-pattern gross margin of about Tk. 190,146 per hectare.
The study emphasizes that annual performance improvements came from system design rather than single-crop maximization. Early potato acted as an entry crop that opened windows for legumes and vegetables, improving aggregate output and profitability while reducing idle land periods. This supports a systems approach to intensification in environments where arable land is constrained and farm incomes depend on better annual sequencing.
Authors also note an important limitation: the evidence comes from a single-season trial, so inter-annual climate variation and location effects still need validation. Even so, the results provide a practical template for adaptive intensification, showing how early-maturing potato genetics can be used to raise cropping intensity, land-use efficiency and economic return without expanding cultivated area.