Enhancing Sugar Beet Yield and Quality in Pakistan: Fertilizer and Tillage Practices

Sugar beet (Beta vulgaris) production and quality problems exist in many areas of the world due to improper application of fertility and tillage. During the 2020–21 season two fertilizer and two tillage programs were evaluated in the Bhakkar district of Pakistan. Four project sites were selected based on lowest soil populations of parasitic nematodes (Diaphoneme spp.) to remove this variable from the study. The two fertilizer programs were (1) a local standard fertilizer program and (2) an analysis-based fertilizer program after a preplant soil analysis. The two tillage practices were (1) locally practiced shallow tillage to 20 cm depth consisting of harrow discing, laser land leveling, and ridging and (2) deep chisel tillage to 45 cm depth after an initial shallow tillage. Data collected included final sugar beet plant population, yield of raw sugar, total plant weight, and millable weight. Quality measurements taken included sugar concentration in the beets (%), forked/deformed roots (%), and root nodulation (%). Results revealed the soil analysis-based fertilizer program improved plant population (to 0.26 plants m-1), and raw sugar yield (to 6.3 t ha-1) compared to the local standard NPKS fertilizer program. Deep tillage, compared to shallow tillage, improved plant population (to 0.26 plants m-1) and raw sugar yield (to 10.0 t ha-1) and improved root quality by reducing the percentage of forked and deformed roots by 7.6%. This study highlights the importance of preplant soil nutrient analyses and deep tillage in designing cost-effective and high quality/high yielding systems for sugar beet production in Pakistan.