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On-Farm Nutrient Balance Studies in the Dry Zone of Myanmar

OAR@ICRISAT

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Relation http://oar.icrisat.org/5595/
http://dx.doi.org/10.1080/14735903.2004.9684570
 
Title On-Farm Nutrient Balance Studies in the Dry Zone of Myanmar
 
Creator Ramakrishna, A
Win, S S
Rego, T J
Wani, S P
Tin, H
 
Subject Groundnut
Soil Science
Food and Nutrition
Agriculture-Farming, Production, Technology, Economics
Fertilizer Appications
 
Description On-farm experiments to study soil fertility depletion—one of the biophysical factors limiting crop production—were conducted in six villages of central Myanmar during 1997 to 1999. Systematic socioeconomic surveys and analysis of socioeconomic and crop production factors aided the selection of farmers.

Topsoil mineral nitrogen content at the start of the cropping season was high (10–25 mg N kg−1). Available phosphorous was around the threshold level for most crops, but exchangeable potassium was low. The predominant continuous cropping system of sole groundnut was on average positive for P (0.24 kg ha−1 y−1) and K (7.05 kg ha−1 y−1) and negative for N (−32.4 kg ha−1 y−1). A negative balance for N in the groundnut/pigeonpea (−58 kg ha−1 y−1) and mung bean/pigeonpea (−56 kg ha−1 y−1) intercropping systems was noted. The nutrient balances were positive in early sesame—late sesame (29 kg N ha−1 y−1, 8 kg P ha−1 y−1, 33 kg K ha−1 y−1) and early sesame/pigeonpea (8 kg N ha−1 y−1, 15 kg P h−1 y−1, 44 kg K ha−1 y−1) production systems while sole sorghum system resulted in positive balance for N (23.8 kg ha−1 y−1) and negative balance for K (−3.8 kg ha−1 y−1).
 
Publisher Taylor & Francis
 
Date 2004
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/5595/1/IJAS_2_2_98-108_2004.pdf
Ramakrishna, A and Win, S S and Rego, T J and Wani, S P and Tin, H (2004) On-Farm Nutrient Balance Studies in the Dry Zone of Myanmar. International Journal of Agricultural Sustainability, 2 (2). pp. 98-108. ISSN 1747-762X