A field experiment is conducted on knol-khol to find out the effect of phosphorous at different doses on various growth, yield and quality traits. The study revealed that the application of phosphorus showed an increase in all the 16 traits studied but highest increase was observed at 90 kg phosphorus per ha over the control. Maximum increase was observed in the phosphorus content in leaves (121.80%) followed by presence of phosphorus in the knob (88.99%), nitrogen in the leaves (67.72 %), nitrogen in the knob (77.35%) followed by zinc in the leaves (46.97 %), chlorophyll content in leaves (44.80%), plant height (40.23 %) and zinc in the knob (37.67 %) at 90 Kg per hectare. A highly positive significant correlation was found between chlorophyll, total soluble sugars, protein nitrogen in leaf, nitrogen in knob, phosphorus in leaf, phosphorus in knob, zinc in leaf, and zinc in knob. The profound effect of phosphorus fertilizer on growth attributes increase metabolic activities leads to increase knob diameter, weight and yield per hectare are discussed in the paper.

Plant height, chlorophyll content in leaves, knob diameter, knob weight, yield, TSS and protein content of knob

On the basis of one year field experimental results it was concluded that the effect of phosphorus was clearly indicating the increased growth, yield and quality on knol-khol. The maximum growth, yield and quality attributes were recorded at 90 kg phosphorus per ha but it was found at par with 60 kg phosphorus, except nitrogen and zinc content in knob while the minimum growth, yield and quality attributes were noticed in the control. The soil application of phosphorus was significantly affected the net returns and benefit cost ratio of knol-khol.

V. Ramesh Naik, L.N. Bairwa and B. Srinivasulu (2022). Effect of Phosphorus on Growth, Yield and Quality of Knol-khol (Brassica oleracea var. gongylodes L.) under Semi arid Plains of Rajasthan. Biological Forum – An International Journal, 14(4a): 428-431.