International Potash Institute
Publication details

Potassium in Asia-Balanced fertilization to increase and sustain agricultural production

635 pages, 24th IPI-Coll., Thailand

Language:

English

Year:

1995

Category:

Proceedings

Price:

25 USD

Proceedings of the 24th Colloquium of the International Potash Institute on "Potassium in Asia - Balanced fertilization to increase and sustain agricultural production"

Chiang Mai, Thailand, February 21-24, 1995

Asia, inhabited by almost 60% of the global population harvests 46% of the total cereals and applies 51% of all nitrogenous, 45% of phosphoric but only 25% of potassic fertilizers to feed the crops. These few figures alone indicate serious imbalance in nutrient usage at the expense of soil fertility and the safeguarding of natural resources: the potassium balance, usually negative, tends to become more so. Rice yield is stagnating or even declining and, in view of further rapid population growth, this a serious problem. Fertile arable land is almost exhausted, reserves can be provided only by rehabiliting degraded land.

The 24th IPI-Colloquium on Potassium in Asia tried to focus on the problem of how to produce on a sustainable basis the requirement of a burgeoning population by drawing the attention to soil fertility and soil potassium (K) status in the main agroclimatic regions of Asia. It is also attempted to provide ideas and information on the management of the potassium supply to plants in cropping systems of different agroclimatic regions and on the nutrient requirements of crops. The session on constraints and opportunities for fertilizer use in Asian countries should address the fertilizer sector to assess the potential recognize the present shortcomings. The session on approaches for the implementation of sustainable soil management practices attempted to answer the problem of overcoming declining soil fertility. Poster sessions concerned nutrient status and diagnosis, nutrient and fertilizer management and the integrated land use management.

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