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DISCUSSION

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3. class v results of n the district a d -1 -1 l also 69 u and and Also i soil. soil, and Soil n soil of e of g s ) PARIPEX - INDIAN JOURNAL OF RESEARCH Volume-7 | Issue-6 | June-2018 | PRINT ISSN No 2250-1991

Fig.6: Available potassium status and spatial distribution across Aravalli district, Gujarat.

Fig.3: Available nitrogen status and spatial distribution across , Gujarat

Recommendation: Across Aravalli and Mahisagar district SNI revealed low fertility class of available nitrogen so, it is recommended to give 25 to 30% more N contain fertilizers.

4.2 Available phosphorus: Available phosphorus of investigated soils across Aravalli district varied from 14 – 123 kg ha-1 with mean value of 46 kg ha-1 and soil nutrient index value was 2.09 revealed medium fertility class of Fig.7: Available potassium status and spatial distribution phosphorus into soil while across Mahisagar district available across Mahisagar district, Gujarat. phosphorus varied from 17 – 372 kg ha-1 with mean value of 70 kg -1 ha and SNI value was 2.50 revealed high fertility class of Recommendation: Across Aravalli and Mahisagar district SNI phosphorus into soil. Spatial variability maps of available revealed higher fertility class of available potassium. So, it is phosphorus status across the soil of Aravalli and Mahisagar district recommended to give 15 to 20% less K contains fertilizer. are shown in figure 4 and 5. 5.CONCLUSIONS It can be concluded that the spatial maps generated under the study will be useful for guiding the farmers to decide the amount and kind of macronutrients to be applied for site specific nutrient management. Geo-statistical analysis estimates range and average variability status of available nutrients while Soil nutrient indices evaluated low fertility class of N and higher fertility class of K across Aravalli and Mahisagar district. SNI also evaluated medium fertility class of P across Aravalli and higher fertility class of P across Mahisagar district. Both, Geo-statistical analysis and SNI helps in better understanding of primary macronutrients management and enhancing crop productivity across Aravalli and Mahisagar district Fig.4: Available phosphorus status and spatial distribution of Gujarat state, India. across Aravalli district, Gujarat. REFERENCES [1] Kanubhai P. Patel, Swanti A. Jain, Bhanuben K. Patel, Manoj S. Jagtap and (2014). Analysis of phosphorus in soil of Lunawada taluka dist: Panchamahal, Gujarat. Scholars research library. Archives of Applied Science Research, 2014, 6 (1):67-72 [2] Khadka, D., Lamichhane, S., Khan, S., Joshi, S., & Pant, B.B. (2016) Assessment of soil fertility status of Agriculture Research Station, Belachapi, Dhanusha, Nepal. Journal of Maize Research and Development, 2(1): 43-57 [3] Nahak Truptimayee, et al., (2016) GPS and GIS Based Soil Fertility Maps of Ranital KVK Farm and Identification of Soil Related Production Constraints. International Journal of Agriculture Sciences, ISSN: 0975-3710 & E-ISSN: 0975-9107, Volume 8, Issue 51, pp.-2242-2251. [4] Patil S.V., Sing.S.R. and Maji.A.K. (2010) A GIS-based land use suitability assessment in Seoni district, Madhya Pradesh, India. Tropical Ecology, 51(1):41-54. [5] Prakash L. Patel, Anita Gharekhan, Nirmal P. Patel & Prakash H. Patel (2014), Study of Micronutrients through Statistical Data Treatment of Agricultural Soil of Fig.5: Available phosphorus status and spatial distribution and Mandvi Sites in . International Journal of Research in Applied, across Mahisagar district, Gujarat. Natural and Social Sciences, Vol. 2, Issue 6, Jun 2014, 135-142. [6] Sen, P., Majumdar.K. and Sulewski.G. (2008), Importance of spatial nutrient variability mappingtofacilitate SSNM in small land holding systems.Indian J. Fert.4 Recommendation: Across Aravalli district SNI revealed medium (11):43-50. African Journal of Agricultural Research Vol. 10(33), 2015, pp. 3281- fertility class of available phosphorus so, it is recommended to 3291. apply appropriate P contain fertilizer according to type of soil while [7] Stewart W.M., Dibb.D.W., Johnston.A.E. and Smith T.J. (2005), The contribution of across Mahisagar district available phosphorus was high so, it is commercial fertilizer nutrients to food production. Agron. J. 97:1-6 recommended to give 15 to 20% less P contain fertilizer.

4.3 Available potassium: Available potassium of investigated soils across Aravalli district varied from 69 – 1419 kg ha-1 with mean value of 293 kg ha-1 and soil nutrient index value was 2.70 revealed high fertility class of potassium into soil while across Mahisagar district available potassium varied from 117 – 1151 kg ha-1 with mean value of 422 kg ha-1 and SNI value was 2.77 revealed higher fertility class of potassium into soil. Spatial variability maps of available potassium status across the soil of Aravalli and Mahisagar district are shown in figure 6 and 7. 70 www.worldwidejournals.com