Statistical concerns for soil fertility field trials
1997
Singh, M. | Ryan, J. (ICARDA, Aleppo (Syria))
Soil scientists are invariably involved in agronomic trials in the field, whether at experimental stations or on farms. Such field trials are conducted to assess aspects of conservation and management of soil resources for optimized production through improved crop husbandry, i.e., selection of cropping systems, tillage methods, adaptable/stable crop cultivars, seeding rates, row spacing and plant density, weeds, fertility and fertilizer response, pests and diseases, and land and water management. This paper discusses some statistical concerns in the context of fertility trials and suggests ways to deal with them. In essence, it alerts agronomists to the need for professional statistical advice in all phases of field trial design and data interpretation
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