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Table1. Critical zones of S and micronutrients deficiency in soils

Categories Available Available Available Available Available Available
sulphur zinc iron copper manganese boron

Acute deficient ≤7.5 ≤0.3 ≤2.5 ≤ 0.2 ≤1.0 ≤ 0.2

Deficient >7.5 to ≤15.0 >0.3 to ≤0.6 >2.5 to ≤4.5 >0.2 to ≤0.4 >1.0 to ≤3.0 >0.2 to ≤0.5

Marginally deficient >15.0 to ≤ 22.5 >0.6 to ≤0.9 >4.5 to ≤6.5 >0.4 to ≤0.6 >3.0 to ≤5.0 >0.5 to ≤0.7

Marginally sufficient >22.5 to ≤30.0 >0.9 to ≤1.2 >6.5 to ≤8.5 >0.6 to ≤0.8 >5.0 to ≤7.0 >0.7 to ≤ 0.9

Adequate >30.0 to ≤ 40.0 >1.2 to ≤1.8 >8.5 to ≤10.5 >0.8 to ≤1.0 >7.0 to ≤9.0 >0.9 to ≤1.10

High >40.0 > 1.8 > 10.5 > 1.0 > 9.0 > 1.10

State, district and block/taluka wise maps of secondary and micronutrients were prepared to
develop precise recommendations for these nutrients in different crops and cropping systems.
Thee maps will be of use for extension agencies and farmers to know the soil status of secondary
and micronutrients for enhancing crop production and crop quality. The categories of available
secondary and micronutrients status in soil used for mapping were acute deficient, deficient,
latent deficient, marginally sufficient, adequate and high. Recommendations i.e. rate, time and
source of secondary and micronutrients have been generated depending upon the crops and

cropping system and fertility ranges of these nutrients.