Residual effect of sources and levels of boron application on greengram (Vigna radiata L) in sunflower - greengram cropping sequence

Residual effect of sources and levels of boron application on greengram (Vigna radiata L) in sunflower - greengram cropping sequence

2004

E01473

Field experiments were conducted at Agricultural Research Station, Bhavanisagar, Tamial Nadu in Inceptisols (Typic Ustropepts) to evaluate boron fertilizers, (Borax, Boric acid and Agribor) and to assess the right mode, level of boron application on the B content and yield of the residual crop greengram. The experimental field was deficient in available B (0.35 mg kg-1). Sunflower was raised as a main crop. Different B levels 0.5, 1.0, 1.5 and 2.0 kg B ha-1 as soil application and two levels of foliar spray 0.2% and 0.3% were compared with control. The treatments were super imposed with recommended dose of NPK. After harvesting the amin crop, green gram was raised as a residual crop on the same field without any alternation. The grain haulm yields of green gram were significantly increased by the residual effect of boron applied to the pevious crop. Application of B at the rate of 2.0 kg ha-1 recorded hightest grain and haulm yields of 958 and 2663 kg ha-1 respectively. The residula effect was not observed at the lower level of B (0.5 kg ha-1) application. The interaction between two source showed that the performances of borax and Agribor were equal at lower levels, while at thigher levels Agribor was found superior to borax. Significant correlations existed between B availability and B concentration in grain and haulm and B uptake with yield indicated the residual effect of B on the yield of green gram.

v.91(7-12):394-398, MADRAS AGRICULTURAL JOURNAL

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