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Title:
Nutrient balances for cassava cultivation in Kampong Cham province in Northeast Cambodia, by Sopheap, U Patanothai, A Aye, Tin Maung , U. Sopheap et al. / International Journal of Plant Production (2012) 6(1): 37-58
Description:
Abstract
In Cambodia, cassava is mostly grown with little or no fertilizer inputs, but the magnitudes of nutrient balances are not known. This study was conducted to assess nutrient balances for cassava cultivation in Kampong Cham province in Northeast Cambodia. Forty-five households in four cassava production zones were interviewed in relation to their cultural practices and crop residue management, upon which sources of nutrient inputs and outputs were based. Chemical fertilizer, manure, planting materials and rainfall were the defined inputs, while cassava roots and stumps were the outputs. Crop cutting was undertaken in the cassava fields of the 45 households to obtain weights of roots and other plant parts. Nutrient balances were calculated for the individual fields based on nutrient contents of the component sources obtained from the literatures. The results showed negative balances for all the nutrients evaluated. The imbalances were most serious for N, K and Ca with the averages of -64.45 kg N, -52.83 kg K and -10.83 kg Ca ha-1, but were less serious for P and Mg with the averages of -2.85 kg P and -7.20 kg Mg ha-1. These negative balances were the consequence of low nutrient inputs in current practices where only a few farmers applied low rates of chemical fertilizer or manure. Continued use of current practices will threaten the sustainability of cassava production in Cambodia. For long term productivity of the crop, the application of organic manures together with lime and chemical fertilizers high in N and K is recommended.

Full Article
keyword:
Soil nutrients; Agricultural sustainability; Soil fertility management; Cassava fertilization; Long-term productivity.
Abstract
In Cambodia, cassava is mostly grown with little or no fertilizer inputs, but the magnitudes of nutrient balances are not known. This study was conducted to assess nutrient balances for cassava cultivation in Kampong Cham province in Northeast Cambodia. Forty-five households in four cassava production zones were interviewed in relation to their cultural practices and crop residue management, upon which sources of nutrient inputs and outputs were based. Chemical fertilizer, manure, planting materials and rainfall were the defined inputs, while cassava roots and stumps were the outputs. Crop cutting was undertaken in the cassava fields of the 45 households to obtain weights of roots and other plant parts. Nutrient balances were calculated for the individual fields based on nutrient contents of the component sources obtained from the literatures. The results showed negative balances for all the nutrients evaluated. The imbalances were most serious for N, K and Ca with the averages of -64.45 kg N, -52.83 kg K and -10.83 kg Ca ha-1, but were less serious for P and Mg with the averages of -2.85 kg P and -7.20 kg Mg ha-1. These negative balances were the consequence of low nutrient inputs in current practices where only a few farmers applied low rates of chemical fertilizer or manure. Continued use of current practices will threaten the sustainability of cassava production in Cambodia. For long term productivity of the crop, the application of organic manures together with lime and chemical fertilizers high in N and K is recommended.

Full Article


Title:
Rice Germplasm Catalog of Cambodia IV
Description:
 
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Title:
Achievements in Research and Technology Development (1999-2017)
Description:
 
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Title:
Annual Report 2011
Description:

The Cambodian Agricultural Research and Development Institute (CARDI) is delighted to present the 2011 Annual Report to various stakeholders who are interested in agricultural crop research and production. This report presents the main research findings and achievements of Plant Breeding, Soil and Water Sciences, Plant Protection, Agricultural Engineering, Socio-Economic Sciences, Agronomy and Farming System Offices, Training and Information Center, and other supporting offices.

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The Cambodian Agricultural Research and Development Institute (CARDI) is delighted to present the 2011 Annual Report to various stakeholders who are interested in agricultural crop research and production. This report presents the main research findings and achievements of Plant Breeding, Soil and Water Sciences, Plant Protection, Agricultural Engineering, Socio-Economic Sciences, Agronomy and Farming System Offices, Training and Information Center, and other supporting offices.

Title:
Weeds of Rice in Asia
Description:

 

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Title:
PHKA RUMDOL PRANG
Description:

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Title:
Summary Report on Main Achievements of Agricultural Research and Technology Development in 2017​ ​and Strategic Directions for 2018
Description:
 Summary Report on Main Achievements of Agricultural Research and Technology Development in 2017 and Strategic Directions for 2018
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 Summary Report on Main Achievements of Agricultural Research and Technology Development in 2017 and Strategic Directions for 2018


Title:
Board Director Result Report
Description:
 
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Title:
Camobodia Journal Volume 8, Number 1 Jan-Jun 2007
Description:
The Forest Plants Family of “Dipterocarpaceae”

Effect of cassava root silage and rice bran on pigs’ growth performanceat smallholder farmers in Pursat province

sustains fish growth for half of the growing cycle

Rainfed Lowland Rice-based Double Cropping in Cambodia

Kompong Siem calcareous: A new phase for the Kompong Siem Soil groupof the Cambodian Agronomic Soil Classification

keyword:
N/A
The Forest Plants Family of “Dipterocarpaceae”

Effect of cassava root silage and rice bran on pigs’ growth performanceat smallholder farmers in Pursat province

sustains fish growth for half of the growing cycle

Rainfed Lowland Rice-based Double Cropping in Cambodia

Kompong Siem calcareous: A new phase for the Kompong Siem Soil groupof the Cambodian Agronomic Soil Classification

Title:
Cambodia Journal Volume 10, Number 1-2 Jan-Dec 2011
Description:
Effects of photosynthetic photon flux and supporting material on the growth and development of Dendrobium sp. plantlets in vitro Srean Pao, Kriengkrai Mosaleeyanon and Chalermpol Kirdmanee

Field Crop Productivity in Relation to Soil Properties in Basaltic Soils of Eastern Cambodia Seng Vang1, R.W. Bell2, Hin Sarith1,2, and Touch Veasna1,

The importance of Cheung Ek Lake, Cambodia: socioeconomic value and negative impacts Seila Sar, Cristy M Warrender, Garry W Warrender and Robert G Gilbert

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Effects of photosynthetic photon flux and supporting material on the growth and development of Dendrobium sp. plantlets in vitro Srean Pao, Kriengkrai Mosaleeyanon and Chalermpol Kirdmanee

Field Crop Productivity in Relation to Soil Properties in Basaltic Soils of Eastern Cambodia Seng Vang1, R.W. Bell2, Hin Sarith1,2, and Touch Veasna1,

The importance of Cheung Ek Lake, Cambodia: socioeconomic value and negative impacts Seila Sar, Cristy M Warrender, Garry W Warrender and Robert G Gilbert

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