Filter by objective

Filter by sectors

Cropland

  • Sectors
    Objective

    Biochar is a charcoal-like substance produced from agriculture and forest wastes which contains 70% carbon. It is used as soil enhancer to increase fertility, prevent soil degradation and to sequester carbon in the soil. Biochar can store carbon in the soil for as many as hundreds to thousands of years. Biochar can be produced through pyrolysis, gasification and hydrothermal carbonization, which leaves bio-oil and syngas as by-products. Small scale production can be through pyrolysis using modified stoves and kilns which are low cost and relatively simple technologies.

  • Sectors
    Objective

    Manure coverage is the practice of covering the surface of manure with materials of certain thickness instead of the traditional method of piling up manure to be exposed to air. Manure coverage changes the amount of manure surface in contact with air. Due to some reactions, i.e., a series of physical, biological and chemical reactions, it can reduce GHG emissions.

  • Sectors
    Objective

    Land management options for mitigation fall in the following four categories: a) cropland management; b) grazing land management/pasture improvement; c) management of agricultural lands and d) restoration of degraded lands. This description focuses on the restoration of degraded lands. Within this description, a differentiation is made between a) management of organic and peaty soils and b) restoration of other degraded lands.

  • Sectors
    Objective

    Fertiliser and manure management in rice fields are important methane mitigation technologies. The fertiliser management mitigation option includes changes in: fertiliser types; fertiliser nutrient ratios; the rates and timing of applications; and use of nitrification inhibitors to reduce methane emissions by affecting methanogenesis in rice fields. Rice cultivation is responsible for 10% of GHG emissions from agriculture. In developing countries, the share of rice in GHG emissions from agriculture is even higher, e.g., it was 16% in 1994.

  • Sectors
    Objective

    Mid-season drainage involves the removal of surface flood water from the rice crop for about seven days towards the end of tillering. The duration of the dry period must be long enough for rice plant to experience visible moisture stress. Rice cultivation is responsible for 10% of GHG emissions from agriculture. In developing countries, the share of rice in GHG emissions from agriculture is even higher, e.g., it was 16% in 1994.

  • Sectors
    Objective

    Cover crops are fast growing crops such as winter rye and clovers that are planted between periods of regular crop cultivation. By covering the soil surface, they protect the soil from erosion, and if leguminous, they fix nitrogen. Later, when ploughed under, they provide humus and carbon to the soil, as well as nitrogen for the subsequent crop.

  • Sectors
    Objective

    This biological approach uses traditional plant breeding and newer biotechnological methods to select and tailor crop varieties with greater carbon sequestration capacity. Improvements in agronomic practices generally have the goal to increase yields. Then humans or livestock usually consume these yields, and subsequently their respiration returns the CO2 to the atmosphere relatively quickly.

  • Sectors
    Objective

    Agricultural ecosystems hold large carbon reserves (IPCC, 2001a), mostly in soil organic matter.Historically, these systems have lost more than 50 Pg Carbon, but some of this carbon lost can be recovered through improved management, thereby withdrawing atmospheric CO2 (Paustian et al., 1998; Lal, 1999, 2004a).

  • Sectors
    Objective

    Rice cultivation is responsible for 10% of GHG emissions from agriculture (Figure 1). In developing countries, the share of rice in GHG emissions from agriculture is even higher, e.g., it was 16% in 1994. A variety of technologies are presented on ClimateTechWiki for reducing emissions from rice cultivation.

    Introduction

    Greenhouse gas emissions from agriculture