Fertility management in dryland conservation cropping systems of the Pacific Northwest

Article Abstract:

Conservation tillage methods in the Pacific Northwest dryland region have been successful in reducing soil erosion, but at the cost of soil fertility. The conservation tillage methods make the soil deficient in nitrogen and sulfur as compared to conventional tillage. The cereal yield is also affected adversely. Due to these reasons, conservation tillage has not been adopted on a large scale in the region. Providing nutrients to the seeds by placing the nutrients in a subsurface layer is more efficient than spreading them over the soil surface, as developing roots require higher fertility.

Research, Arid regions agriculture, Soil fertility

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Low-input, on-farm composting of high C:N ratio residues

Article Abstract:

An on-farm, low-input composting technique for grass and straw with a high C:N ratio achieves up to 88% reduction in the volume of wastes in 20 to 24 weeks. The method involves making windrows and turning them zero to six times. No additional water besides rain and N besides that present in the wastes is required. An average temperature of 50 degree celsius is attained which is sufficient to kill weed seeds and pests. This technique is ideal for the disposal of farm residues and recycling of nutrients as it does not require low C:N ratio that is necessary for conventional methods.

Methods, Waste management, Compost, Agricultural wastes

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Diversification for new management systems opportunities in the Pacific Northwest

Article Abstract:

Agricultural management systems in the Pacific Northwest require diversification to cater to the various aspects of sustainable rainfed cropping systems. Animal grazing needs to be integrated with crop production in grass seed cropping systems. Effective tillage and residue management methods can control erosion and increase water infiltration. The biocontrol approach for weed control can reduce the chemical requirement. Using legumes in crop rotation can break the disease cycles and add N and C to the soil. This will improve the biological properties of the soil.

Management, Agriculture

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