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Inferences...
Following inferences have been drawn from the study of soil test values with respect to nitrogen,
phosphorous and potash (NPK):
1. Macronutrient Status in Soils
(Nitrogen, Phosphorous and Potash):
Low
Nitrogen
Phosphorus
Medium to High
Potassium
A. Based on State wise soil test summaries for NPK, following conclusions have been drawn
and details have been presented in Table 1:
i. Soils in North-Western states in India, iii. Madhya Pradesh was the state, where
available nitrogen were found 56.48% in maximum soils (85.45%) were found high
low, 27.25% medium and 16.27% in high and least soils (1.01%) were low in
contents. In Uttar Pradesh, Punjab, available potash content. In Uttar Pradesh,
Rajasthan and Haryana, most of the soils Punjab, Haryana, Himachal Pradesh,
(55.55 to 61.66 %) were low, some (19.63 Uttrakhand and Jammu & Kashmir most of
to 32.80%) were medium and few (10.78 to the soils (42.14 to 68.79%) were found in
18.71%) were high in nitrogen content. medium whereas other States like
Soils of Gujarat, Uttrakhand and Jammu & Rajasthan, Gujarat and Chhattisgarh soils
Kashmir were low to medium whereas in were found in medium to high content of
Chhattisgarh, Himachal Pradesh and available potash.
Madhya Pradesh soils were medium to
high content in available nitrogen contents.
On overall basis, most of the soils were found
low in available nitrogen and phosphorous
ii. Most of the soils (61.02%) were low, some contents whereas medium to high in available
(25.89%) were medium and few (13.09%) potash contents.
were high in available phosphorous
contents.
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