21. Calcium hydroxide has a neutralizing value (calcium carbonate equivalent) of . . . . . . . .
22. N content in Humic & Fulvic acids are
23. Which country has largest deposits of K?
24. The critical value for K deficiency in maize is
25. The microrelief of soils produced by expansion and contraction with changes in moisture is known as
26. Chain like Phyllosilicate is
27. Iron deficiency starts when it is
28. Soils high in swelling clays which crack widely upon drying resulting in shrinking, shearing and soil mass movement are characteristics of
29. Relative Humidity is measured by
30. The particle density of clay soil is
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