An Asian Journal of Soil Science

K. Coumaravel ¹, A. Baskar ¹

Affiliations
1 Department of Soil Science and Agricultural Chemistry, P.J.N. College of Agriculture and Research Institute, Karaikal, Puducherry (U.T.), IN

Abstract

Field experiments were conducted in the Eastern farm of Pandit Jawaharlal Nehru College of Agriculture and Research Institute, Karaikal, during Kharif season of 2008-2009 with an objective to assess the effect of different water regimes and nutrient management practices on yield, yield attributes and uptake of nutrients. Among the different rice eco systems, crop grown under saturated water condition had recorded the highest grain, straw yield and panicle weight whereas rice transplanted under continuous submergence condition had recorded the highest N uptake but rice transplanted under saturated water regimes had recorded highest phosphorus and K uptake. The rice sown under aerobic conditizon under dry ploughed soil had recorded the lowest grain and straw yield. The higher grain yield was recorded by application NPK @ 120:60:40 kg ha^-1 and lowest yields were reported by absolute control.

Keywords

Nutrient Levels, Submergence, Saturation and Aerobic Rice Eco System.

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K. Coumaravel ¹

Affiliations
1 Department of Soil Science and Agricultural Chemistry, P.J.N. College of Agriculture and Research Institute, Karaikal, Pudducherry (U.T.), IN

Abstract

Field experiments was conducted during 2001-2002 on a sandy loam soil (Fluventic haplustept) to study the effect of N regimes and green leaf manure (GLM) application on the nutrients uptake by rice and rice grain. The treatments included different N regimes viz., 100 kg N ha^-1, 150 kg N ha^-1, LCC 3, LCC 4, SPAD 33, SPAD 35 and SPAD 37 with two short duration rice genotypes viz., ADT 39 and CORH 2 with or without application of green leaf manure. Application of higher levels of N resulted in the significantly higher uptake of N, P, K, Fe, Zn, Cu and Mn by the plant. It enhanced the N, P, Zn and Mn uptake by the grain. Addition of green leaf manure had significantly increased the N, P, Zn, Mn, and Cu uptakes by the rice plant, but it did not show any significant differences among the nutrients uptakes by grain. The uptake of nutrients by rice was also increased with the advancement of crop growth.

Keywords

N Levels, SPAD, LCC, Green Leaf Manure, Nutrient, Rice, Grain, Uptakes.

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S. Sivagnanam ¹, R. Singaravel ¹, K. Coumaravel ²

Affiliations
1 Department of Soil Science and Agricultural Chemistry, Annamalai University, Annamalainagar (T.N.), IN
2 Department of Soil Science and Agricultural Chemistry, P.J.N. College of Agriculture and Research Institute, Karaikal, Puducherry (U.T.), IN

Abstract

Field experiment was conducted in a farmer’s field at Ponnanthittu village in Cuddalore district of Tamil Nadu to find out the influence organic manure and NPK on the soil properties and yield of groundnut in coastal sandy soil. Different organic manures viz., Control, Farm yard manure @ 12.5 t/ha, Composted coir pith (CCP) @ 12.5 t/ha, Casuarina leaves @ 10.0 t/ha and Dhaincha @ 10.0 t/ha were applied as main treatments and different NPK levels viz., 75 per cent, 100 per cent, 150 per cent and 200 per cent of recommended NPK for groundnut was studied as sub treatments in Factorial Randomized Block Design with three replications. Groundnut var. VRI 2 was grown as test crop. The results of the study indicated that application of different organics significantly reduced the pH, salinity and increased the nutrient availability of soil. Among different treatments, application of 150 per cent NPK along with 12.5 t/ha of composted coir pith significantly increased the growth and yield of groundnut.

Keywords

Organic Manures, NPK, Coastal Soil, Groundnut.

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