RESPONSE OF GROUNDNUT TO ZINC, BORON AND ORGANICS ON THE YIELD AND NUTRIENT AVAILABILITY IN COASTAL SANDY SOIL
The light texture sandy soils are also well known for the deficiency of micronutrients especially zinc and boron. The zinc (Zn) and boron (B) plays an important role in improving the yield and quality of groundnut. A field experiment was conducted to find out the response of groundnut to Zn and B on the nutrient availability and yield of groundnut in coastal sandy soil. . The experiment was carried out in a farmerâ€™s field at Ponnanthittu coastal village, near Chidambaram Taluk, Cuddalore district, Tamil Nadu. The Physico- chemical properties and nutrient status of initial soil were: pH- 8.39, EC- 1.61dSm-1 , organic carbon- 2.7 g kg-1 and Zn â€“ 0.70 mg kg-1,Â Â Â Â Â B- 0.07 mg kg-1, respectively.Â Control, 100% NPK, 150% NPK, 150% NPK + ZnSO4 @ 30 kg ha-1, 150% NPK + Borax @15 kg ha-1 and 150% NPK + ZnSO4 @ 30 kg ha-1 + Borax @15 kg ha-1 were the treatments studied in a Randomized Block Design (RBD) with four replications, using groundnut variety VRI 2. All the treatments received a common dose of Composted Coirpith application @ 12.5 t ha-1. The results clearly indicated that, 150% NPK along with ZnSO4 @ 30 kg ha-1 and Borax @ 15 kg ha-1 with composted coirpith application significantly increased the nutrient availability and yield of groundnut. This treatment recorded the highest pod yield of 2466 kg ha-1 and haulm yield of 3354 kg ha-1 as compared 100% recommended NPK alone 1878 and 2663 kg ha-1 of pod and haulm yield, respectively.
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