Journal
NEW ZEALAND JOURNAL OF AGRICULTURAL RESEARCH
Volume 64, Issue 4, Pages 483-507Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/00288233.2020.1742745
Keywords
Irrigation; soil; compaction; land use; soil quality; pasture; agriculture
Categories
Funding
- Ministry for Primary Industries Sustainable Farming Fund [405305]
- Federated Farmers of New Zealand Inc
- Foundation for Arable Research
- Amuri Irrigation Company Ltd
- Rangitata Diversion Race Management Ltd
- Waimakariri Irrigation Ltd
- Central Plains Water Ltd
- Manaaki Whenua-Landcare Research, Barrhill Chertsey Irrigation Ltd
- Opuha Irrigation Ltd
- Morven Glenavy Ikawai Irrigation Company Ltd
- Irrigation New Zealand
- DairyNZ Ltd.
- New Zealand Ministry of Business, Innovation and Employment [C09X1309, CX09X162]
- Environment Canterbury Regional Council
- Beef and Lamb New Zealand Ltd
- New Zealand Ministry of Business, Innovation & Employment (MBIE) [C09X1309] Funding Source: New Zealand Ministry of Business, Innovation & Employment (MBIE)
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This paper reviews the effects of irrigation on soil physical properties, finding that irrigation alters soil physical characteristics, especially in regions with higher rainfall. The impacts of irrigation on soil physical properties vary greatly under different climatic conditions.
This paper reviews the effects of irrigation on soil physical properties, particularly soil water movement and storage, under predominantly pastoral systems. Few studies address how irrigation impacts these in temperate climates, with very few studies under modern spray irrigation and intensive pastoral farming. Irrigation generally means intensive land use will occur. It is difficult to uncouple factors affecting physical conditions such nutrient cycling, land use, stock class, grazing management and animal treading. Irrigation (with associated increased land use intensity) tends to alter soil physical properties, changing them to be like soils formed under higher rainfall particularly in arid and semi-arid climates. Changes in physical properties under irrigation in temperate and sub-humid climates were more variable. Some studies showed increased available water capacity, while others showed no change. Knowledge gaps include effects of irrigation intensification on soil physical properties under modern farm systems to improve process, management, spatial and temporal information.
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