National Academy of Agricultural Sciences (NAAS)
|
PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Spatial distribution of nitrogen, phosphorus and potassium were studied from 99 coconut farmers covering 195 acres representing different irrigation situations in Chikkapattanagere of Chikkamagaluru district, Doddaghatta of Davangere district, Siriyur of Shivamogga district and Madhure of Chitradurga district of Karnataka state, India. The gardens selected were aged 20-25 years with varying management levels. The Standard technique of grid method of sampling at 50x50 m spacing was employed to collect soil samples from selected study area at two depths (0-30 and 30-60 cm) with geographical identity by GPS. The soil samples were analyzed for major nutrients by following standard procedure. Across all locations, nitrogen status remained low while that of phosphorus shared medium to high status in equal proportion. Concerning potassium, 68 per cent of the topsoil had high status. Fertility mapping of each area was drawn using these data on GIS environment, Fertilizer recommendations based on soil test values for each grid is employed to calculate major nutrients required for fertilizer application. The comparison was made for package recommendation and the site specific recommendation. Rescheduling of major nutrients based on site specific variations of 0-30 cm emphasized slightly higher application (844 kg) of nitrogen and marginally less application of phosphorus and potassium. The study reveals the variations in the application of nutrients providing scope for re-allocation of these resources based on site specificity. Depending on site specific nutrient variations, nutrient application advisories were made for farmers in each location.
Citations |
 |
 |
 |
 |
