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Studies on Soil Properties by Growing Different Green Crops

M. A. Motalib
Principal Scientific Officer
Soil Science Division, BTRI, Srimangal, Moulvibazar

Ashim Kumar Saha
Scientific Officer
Soil Science Division, BTRI, Srimangal, Moulvibazar

Apu Biswas
Scientific Officer
Soil Science Division, BTRI, Srimangal, Moulvibazar

Abstract/ Executive Summary:

Long-term tea cultivation has led to degradation of the soil. Old tea soils require rehabilitation for restoring soil health. Soil rehabilitation by growing different green crops can break the chain of monoculture of tea. To find out the efficiency of different green crops on the improvement of soil properties an experiment was conducted at Bangladesh Tea Research Institute (BTRI) Farm. The experiment was started in the year 2008 and continued up to 2011. Four green crops such as Guatemala, Citronella, Mimosa and Calopogonium were grown to develop the nutritional value of the degraded tea soil. Soil samples were collected and analyzed before and at the end of experiment. Soil pH was increased to 4.5 in Guatemala, Citronella and Calopogonium treated plots. Highest content of organic carbon (1.19%) and total nitrogen (0.119%) was found in Mimosa and Calopogonium treated plots respectively. Concentration of available phosphorus, calcium and magnesium in all green crops treated plot were above the critical values while available potassium content was above the critical value in Guatemala, Citronella and Mimosa treated plots. Changes of soil pH and available potassium were significant at 1% level while changes of organic carbon content, total nitrogen and calcium are insignificant. Changes of available phosphorus and magnesium were significant at 5% level.

Keywords: Green crop, Tea soil properties

Location: BTRI farm

Start Date: 01-01-2006

End Date: 31-12-2009

Program Area: Crop-Soil-Water Management

Commodity: Manures

Objectives:

To know the improvement of soil properties by growing different green crops

Methodology:

Treatments: 5 Replication: 4 No. of plots:20 Design: RBD Treatment combination: T1= control T2 = Guatemala T3 = Citronella T4 = Mimosa T5 = Calapogonium Soil analysis has done every year.

Source of Information: Annual Report 2009

Article Link (Online Journal):

Funding Source:

1.

Budget:

Total Budget (Tk.) :

Achievement/Findings:

From the above discussion it is clear that green crops play an important role on replenish the soil nutrient status. Deteriorated soil can be rehabilitated with these green crops. The practice of green manuring and soil rehabilitation is as old as agriculture itself. Leguminous crops such as Mimosa, Calopogonium and non-leguminous crops such as Guatemala, Citronella were grown and turned into the soil while they were still green to enrich the soil nutrient status. These four green crops enriched soil pH, organic carbon, total nitrogen, available phosphorus, potassium, calcium and magnesium content in soil.

Knowledge Management: Report/Proceedings