51. A fertiliser not listed in the FCO cannot be labelled an sold as fertiliser because it is
52. Single super phosphate is manufactured from
53. Green manures are mostly used as a source of
54. Sulphur content in ammonium sulphate is
55. The contribution of fertilisers to increase in food production is
56. Fertiliser needed to make 300 L of 1% solution is
57. CEC values for organic soils lies in range of
58. Arc process is related with manufacturing of which fertilizer?
59. The nitrification process is most active when the pH is between
60. Which one of the following is an example of positive interaction
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