Soil fertility mapping and its validation using spatial prediction techniques

Singh, K.N. and Rathore, A. and Tripathi, A.K. and Rao, A.S. and Khan, S. (2010) Soil fertility mapping and its validation using spatial prediction techniques. Journal of the Indian Society of Agricultural Statistics, 64 (3). pp. 359-365.

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Optimum return from the investment on inputs and minimum environmental pollution are the two major issues to be addressed while prescribing soil test based nutrient recommendations. A comprehensive knowledge of the soil resource is of fundamental importance for efficient land use planning. Green revolution by using high-yielding varieties and improved management technology has increased crop production at the cost of productivity of soil and possible risk of soil degradation. Decrease in the soil fertility and imbalanced use of nutrients are important factors responsible for stagnation or decrease in the crop yields over the years. Thus, it should be firmly understood that further increase in food production must be attained by judicious use of soil as a resource. Fertility being the costliest input, the scientific approach towards profitable agriculture would imply, use of plant nutrients according to the actual needs of the soil-crop situation. In this study, soil fertility maps were prepared using point estimates at different geographical locations using stratified multistage stratified random sampling. An appropriate kriging method was used for different nutrients using Akaike?s information criterion. The prepared soil fertility maps were validated using soil test values estimated in the next two consecutive years after mapping. There was a significant agreement between estimated soil test values obtained through kriging and those determined in the following years by actual sampling

Item Type: Article
Author Affiliation: Indian Institute of Soil Science, Bhopal
Subjects: Social Sciences
Divisions: General
Depositing User: Syamala
Date Deposited: 06 May 2011 05:27
Last Modified: 06 May 2011 06:08
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