References Of Agriculture Policy In Zambia

Effect on soil organic matter and soil fertility of the chitemene slash-and-burn practice used in northern Zambia. In K. Mulongoy and R. Merckx, Eds. Soil Organic Matter Dynamics and Sustainability of Tropical Agriculture. John Wiley, Chichester, United Kingdom, pp. 367-375. Baldock, J. A. and P.N. Nelson. 2000. Soil organic matter. In M.E. Sumner, Ed. Handbook of Soil Science. CRC Press, Boca Raton, FL, pp. 25-84. Biswas, J.C., J.K. Ladhs, and F.B. Dazzo. 2000. Rhizobia...

Impacts of Greenhouse Gas Emissions on Food Security

The direction of the various expected impacts on consumers and on farm income is summarized in Table 4.2. Farm income is defined as returns to land, labor, and capital. The net effect on food security depends on local conditions. Table 4.2 General Impacts of Rising Concentrations of Greenhouse Gases on Factors Affecting Food Security CO2 fertilization Climate change Extreme weather events Sea level rise Higher levels of CO2 in the atmosphere tend to increase plant growth. However, increases in...

Ecological Regions In Zambia

Characterize Agriculture Tanzania

Zambia is a landlocked country located in the tropics between latitude 8 -18 S and longitude 22 -33 E (Figure 25.1). Its tropical continental climate has clearly defined dry and rainy seasons. Three agroecological regions (see Figure 25.2 for locations), based on climatic characteristics with annual rainfall ranging between 700 and 1400 mm as the dominant factor, have been defined (Veldkamp et al., 1987). These zones are described below. Figure 25.1 Location of Zambia in Southern Africa. Figure...

Main Characteristics Of Farming Systems In Drylands

Drylands have particular characteristics that will affect their capacity to sequester carbon. Drylands often experience high temperatures, low and erratic rainfall, minimal cloud cover, and small amounts of plant residues to act as surface cover to minimize radiation impact. As a result, soils in the drylands are, generally, both inherently low in organic matter and nutrients and rapidly lose large proportions of those small quantities as CO2 when exposed by tillage and other conventional...

Soil Organic Matter Soil Carbon and Carbon Sequestration in Zambia

Diagram Tieridging

Soils under almost all farming systems in Zambia are low in N, P, and SOM (Stromgaard, 1984). It has been easy to detect and demonstrate evidence of N deficiency in cropped soils, but declines in SOM have been rather difficult to identify and quantify (Lungu, 1987). On the other hand, when crop residues are returned to the soil and legume cover crops are grown, they lead to increased organic C content and improved water retention. The contributions of decomposed legume litter to SOC were...