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172150.pdf.jpg
Thesis
2003
Department of Soil Science and Agricultural Chemistry, College of Horticulture, Vellanikkara

The present study was conducted with an objective to analyse the soil-plant system, the levels and interactions of nutrient ions in soil, soil solution and plant thereby / finding out the contributing factors to yield. The importance of the term relative intensity lies in the fact that the contribution of mineral elements to growth and yield of plants depend much o...

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Thesis
2019
Department of Soil Science and Agricultural Chemistry, Vellanikkara

The present study was undertaken to unravel the chemistry of Carbon: Nitrogen dynamics in submerged acid sulphate and acid saline soils, to identify the labile fractions of these elements contributing to soil fertility and to modify the organic carbon based fertility ratings for nitrogen recommendation in Kale lands. Forty-five representative soil samples from 4 di...

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Thesis
2013
Department of Soil Science & Agricultural Chemistry, College of Horticulture, Vellanikkara

Sixty five representative soil samples from 23 agro ecological units under five agro ecological zones of the state were collected and characterised with respect to the available boron status for the present study on “Chemistry and transformation of boron in soils of Kerala”. The samples were characterised for pH, EC, CEC, PBS, exchangeable cations, total sesquioxid...

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Thesis
2017
Department of Soil Science and Agricultural Chemistry, College of Agriculture, Thrissur

Calcium and magnesium are indispensible as secondary nutrients for plant growth. Availability of these nutrients to plants depends on the form and quantity present in soil. Soils of the tropics normally pose the problem of acidity due to high rainfall and leaching of bases causing widespread deficiency of these nutrients. The study aims at characterization of ...

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Thesis
2015
Department of soil science and agricultural chemistry, College of Horticulture, Vellanikkara

Field experiments on aerobic and flooded systems of rice were conducted in second crop season with the objectives to study the nutrient dynamics and transformations in these systems in second crop season with rice (variety Jyothi), in farmer’s field, at Nellikkattiri, Thirumittakode panchayat, Palakkad district. The treatments with two doses of fertilizers (as per ...

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Thesis
2005
Department of Soil Science and Agricultural Chemistry, College of Horticulture, Vellanikkara

A pot culture experiment was carried out at Radiotracer laboratory of College of Horticulture, Vellanikkara, using laterite soil (Ultisol), from the main campus of Kerala Agricultural University with the objectives to trace the fate of fertilizer P and to study the dynamics of P by the addition of amendments. The experiment included 13 treatments of three levels of...

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Thesis
2000
Department of Soil Science and Agricultural Chemistry, College of Horticulture, Vellanikkara

The present study was conducted in the main campus of Kerala Agricultural University, Vellanikkara with the objective of preparation of a detailed soil resource inventory. The total area of the campus is 384.56 ha. The inventory under this report was carried out covering the eastern part of the campus comprising an area of 214 ha which is divided into 25 bl...

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173396.pdf.jpg
Thesis
2014
College of Horticulture, Vellanikkara

Three locations from 7 agro ecological units dominated by rice crop were identified namely, Onattukkara sandy soil(AEU 3), Kuttanad(AEU 4), Pokkali(AEU 5), Kole(AEU 6), north central laterite(AEU 10), Palakkad central plains (AEU 22) and Palakkad eastern plains (Black soils )(AEU 23). Geo-referenced soil samples were collected at 3 stages: before cropping season, a...

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173396.pdf.jpg
Thesis
2014
Department of Soil Science and Agricultural Chemistry,College of Horticulture, Vellanikkara

Three locations from 7 agro ecological units dominated by rice crop were identified namely, Onattukkara sandy soil(AEU 3), Kuttanad(AEU 4), Pokkali(AEU 5), Kole(AEU 6), north central laterite(AEU 10), Palakkad central plains (AEU 22) and Palakkad eastern plains (Black soils )(AEU 23). Geo-referenced soil samples were collected at 3 stages: before cropping season, a...

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