The impact of long-term manure and balanced fertilisation on yield and yield attributes of groundnut, wheat and sorghum on Vertic haplustepts under groundnut-wheat-sorghum cropping system

Abstract

The study has been carried out for showing of yields and yield attributes in a groundnut-wheat-sorghum (fodder) cropping system under a permanent plot experiment (2000-2020) in medium black calcareous soil at the Instructional Farm, College of Agriculture, Junagadh Agricultural University, Junagadh. There were six treatments, viz., T1: control, T2: FYM @ 25 t/ha, T3: ½ NP, T4: ½ NP + K, T5: NP and T6: NP + K. The recommended fertilizer doses for groundnut, wheat and sorghum are 12.5-25-50, 120-60-60 and 80-40-00, respectively. The pooled results of groundnut yield indicated that the half dose of N and P recommended for the respective crops under irrigated condition but with K (T3) increased pod and haulm yield in first 10 years, while, with increasing level of fertilizer application (T6: Full dose of N and P recommended for the respective crops under irrigated condition but with K) increased pod and haulm yield of groundnut in next 10 years. However, increasing level of fertilizer application significantly increased grain and straw yield of wheat and fodder yield of sorghum in groundnut-wheat-sorghum cropping system in medium black calcareous soil of PPE over 20 years, whereas maximum value was found under the treatment of full dose of N and P recommended for the respective crops under irrigated condition but with K (T6). The result revealed that application of inorganic fertilizer improved soil fertility and produces a maximum yield of groundnut, wheat and sorghum in groundnut-wheat-sorghum cropping system.