Phosphatic fertilizer

a) Water soluble phosphatic fertilizer: SSP, DSP, TSP(monocalcium)

b) Citric acid soluble phosphatic fertilizer: Dicalcium phosphate

c) Insoluble phosphatic fertilizer: Tricalcium phosphate

Nitrogen fixation

a) Azospirillum: 20-30 kg N/ha.

b) Azolla: 40-60 Kg N/ha

For soil testing

a) No. of sample: 10-25 / ha

b) Sample size: 250-500 gm

c) Depth of sampling : 0-6 inch for agronomical crop and 1 m for horticultural crop

Instrument for measuring evaporation

a) united states weather bureau (USWB) open evaporimeter

b) Sunken screen evaporimeter

c) Can evaporimeter

d) Portable evaporimeter