Effect of nutrient feeding on controlling leaf chlorosis, yield and physico-chemical composition of sweet orange (Citrus sinensis L. Osbeck) cv. Mosambi

The present investigation was conducted in sub-tropical weather in farmer's field at Jhargram, West Bengal during 2018, to know the effect of nutrient feeding on controlling leaf chlorosis, physico-chemical composition of sweet orange (Citrus sinensis L.Osbeck) cv.Mosambi.The investigation wascompleted in a randomized complete block design(RCBD) with seven treatments (T 1 -Vermiwash @6ml/litre, T 2 -Multiplex-@ 3ml/litre, T 3 -Humar @ 3ml/litre, T 4 -ZnSO 4 @ 0.4% + borax @ 0.2% +FeSO 4 @ 0.2% + MnSO 4 @ 0.2%, T 5 -Nitrophoska @8g/litre, T 6 -T 4 +after 07 days T 5 and T 7 -Control) with four replica.Based on the results, it was concluded that the minimum leaf chlorosis (5.1%)with maximum vitamin C (41.8 mg/ 100g) were observed with treatment T 2 , while the maximum number of fruits per plant (65.0), yield per plant(6.63kg), fruit juice (43 %) and TSS content (9.4 %) were observed with treatment T 4 followed by T 6 and maximum fruit weight (108 g) and minimum acidity (0.29 %) were observed with treatment T 6 .The vermiwash, an organic sources of different nutrients, hormones, etc. also showed a good results with regard to reducing leaf chlorisis, increasing fruit yield and quality fruits and is recommended for organic farming.