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Journal of the Department of Agriculture, Western Australia, Series 4
Manures, Vegetables, Western Australia
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AT one time organic manures provided the only means to return the plant nutrients into the soil, which were removed by cropping.
With the rapid increase of mechanisation, these materials have become very scarce, and their cost extremely high.
It is, therefore, necessary to consider whether the benefits gained from their use are sufficient to warrant their high purchase price, or indeed whether the use of manures is warranted at all.
"Organic manures in commercial vegetable growing,"
Journal of the Department of Agriculture, Western Australia, Series 4: Vol. 2:
6, Article 22.
Available at: https://library.dpird.wa.gov.au/journal_agriculture4/vol2/iss6/22