An Asian Journal of Soil Science

H. L. Sakarvadia ¹, K. B. Polara ¹, R. L. Davaria ¹, K. B. Parmar ¹, N. B. Babariya ¹

Affiliations
1 Department of Agricultural Chemistry and Soil Science, Junagadh Agricultural University, Junagadh (Gujarat), IN

Abstract

A field experiment was conducted during 2009-11 to 2011-12, on medium black calcareous soil (Typic Ustocrepts) with hybrid Bt cotton (NH 44) using seven levels of K₂O (0, 120, 150, and 180 kg ha^-1 and each in split application, 1/2 at basal and 1/2 at 45 DAS) and two levels of ZnSO₄ (0, and 50 kg ha^-1) at Cotton Research Station Junagadh Agricultural University, Junagadh. The results showed that the significantly higher average seed cotton (2313 kg ha^-1) and stalk (3208 kg ha^-1) yield were recorded with split application of potassium @150 kg ha^-1 (1/2 at basal and 1/2 at 30 DAS) and basal application of potassium @150 kg ha^-1, respectively. Whereas the significantly higher average seed cotton yield (2307 kg ha^-1) and stalk yield (3165 kg ha^-1) were recorded with application of ZnSO₄ @ 50 kg ha^-1. The interaction effect of K₁₈₀ × Zn₅₀ was also found significant on seed cotton yield (2496 kg ha^-1). The significantly higher values of bolls per plant (51.5), five boll weight (23.6g.), oil content (20.88 %), SFI (12.68), sympodial (12.07) and monopodial (2.75) branches per plant and plant height (108.5 cm) were observed with the basal application of potassium @ 150 kg ha^-1 (K₃). Maximum uptakes of K and Zn by seed cotton as well as stalk were recorded under application of 180 kg K₂O and 50 kg ZnSO₄ ha^-1, respectively.

Keywords

Potassium, Zinc, Cotton Yield, Nutrient Uptake.

Full Text

     

H. L. Sakarvadia ¹, K. B. Polara ¹, R. L. Davaria ¹, K. B. Parmar ¹, N. B. Babariya ¹

Affiliations
1 Department of Agricultural Chemistry and Soil Science, Junagadh Agricultural University, Junagadh (Gujarat), IN

Abstract

A field experiment was conducted on garlic var. GG-3 in medium black calcareous soils (Typic Ustocrepts) using fertility gradient approach and fertilizer prescription equation were calculated. The results of follow up trails conducted at different locations showed that yields targeted were achived below ± 10 per cent variation but adjusted fertilizer prescription equation were fitted only at yields targeted of 60 to 70 qha^-1 yield of garlic in the study. The income/cost ratio for the additional produce obtained over recommended dose 14.8 and 15.1 for garlic bulb yield at targets of 60 and 70 qha^-1, respectively.

Keywords

Medium Black Calcareous Soils, Nutrient Requirements, Yield Target, Garlic.

Full Text

     

K. B. Polara ¹, H. L. Sakarvadia ¹, K. B. Parmar ¹, N. B. Babariya ¹, R. L. Davaria ¹

Affiliations
1 Department of Agricultural Chemistry and Soil Science, Junagadh Agricultural University, Junagadh (Gujarat), IN

Abstract

Pot culture experiment was conducted by using bulk soil samples collected from different Agricultural Research Station, Junagadh Agricultural university, Junagadh and were categorized as low, medium and high with respect to native soil fertility status of zinc. Three treatments with three replicated pots in each type of soil were imposed with common recommended levels of N and K and varied levels of Zn for Zn treatment experiment in the respective sets of pots under each of the low, medium and high fertility soils. Fertilization of zinc significantly increased seed cotton and stalk yields and Zn content in plant as well as in soil. The seed cotton yield response was 16.3 and 24.5 per cent at 5.0 and 10.0 mgkg^-1 Zn levels, respectively. Obviously, the yield response of cotton to added Zn was considerably higher in low Zn soils than in those of medium and high Zn status. The critical levels of available Zn 0.89 mgkg^-1 in soil and concentration of Zn in cotton 4^th leaf at 30 DAS and at maturity in leaf were found to be 57.5 and 24.6 mgkg^-1, respectively.

Keywords

Critical Limits, Cotton, Zinc, Calcareous Soils.

Full Text