The soil, plant and Water testing laboratory at Krishi Vigyan Kendra, Udupi for the benefit of the farmers and agriculturists in analyzing soil for available nutrients and water for suitability of irrigation. The laboratory is well equipped with several modern equipments for analysis of nutrients in soil and plant and also to asses quality of water for irrigation purpose.
The laboratory provides information on soil testing, fertilizer recommendation, reclamation of problematic soils, compost preparation, waste recycling for maximizing the productivity by maintaining soil health. It also facilitate training on soil, health. It also facilitate training on soil, plant and water testing for different targeted groups, The laboratory is functioning in disease diagnosis, identification of causal organisms and remedies to the farming at large community. The facilities are also available for identification and rearing of insects / mites infested specimens.
Soils of Udupi District
The soil in Udupi district are in three types namely:
- Coastal alluvium soils
- Laterite soils
- Red loamy soils
Paddy, coconut, areca nut and cashew are the major crops in the region. About half of the agricultural land is being submerged during the rainy season is being used for the paddy crop. Remaining land is being covered by coconut and areca nut. Cashew crop is being grown in the marginal and wastelands of the coastal zone. The zone receives an annual rainfall of about 4000 mm and above, with hot humid climatic condition. The soils were formed from red lateritic and hydroxy oxides of iron and aluminium parent material are acidic in nature. The parent material and climatic condition is favourable for the development of acid soils.
Soil reaction (pH):
It was observed that 96% of soils were found to be acidic in nature. Among acid soils 9% were extremely acidic (pH < 4.50), 40% were strongly acidic (pH: 4.50 ÃƒÂ¢Ã¢â€šÂ¬Ã¢â‚¬Å“ 5.00), 35% were strongly acidic (pH: 5.00 ÃƒÂ¢Ã¢â€šÂ¬Ã¢â‚¬Å“ 5.50) and 12 % were medium acidic (pH: 5.50 ÃƒÂ¢Ã¢â€šÂ¬Ã¢â‚¬Å“ 6.00) (Table 1). It might be due to soils formed from lateritic oxides of iron-aluminums parent material under hot humid climatic condition. The coastal zone which receives an annual rainfall about > 4000 mm. Rain water wash away basic cations such as Na, K, Ca and Mg from the soil and leaving behind Fe and Al. Iron and aluminums upon hydrolysis releases hydrogen ions which lead to development of acidic soil.
Soil acidity classes of Coastal Zone of Karnataka
Soil fertility status of Udupi district soils
Soils analyzed results in the Krishi Vigyan Kendra, Brahmavar, revealed that, soil available nitrogen ranged from low to medium; available phosphorus ranged from medium to high and potassium is medium to high. Among the different crops cashew is being grown under low fertile soils.