46 AGRICULTURAL EXPLORATIONS IN ALGERIA. 



Table 9. — ('Jifinicnl (HKih/xrx of Kidinc or "«//.-a/(" fioilxfroiu Algirm. 



T.\Bi,E 10. — Conrciitioiial i-oinliimdhivst of fhe data in T(d>le 9. 



No. of 

 'sample. 



7658 

 7659 

 7665 

 7666 

 7667 

 7668 

 7669 

 7670 

 7671 

 7672 

 7673 

 7674 

 7675 

 7676 

 7677 

 7679 

 7680 

 7681 

 7682 

 7683 

 7684 

 7685 

 7686 

 7687 



Percent 

 soluble 

 matter. 



2.47 

 6.14 

 4.36 

 4.02 

 4.49 

 4.48 

 4.50 

 4.43 

 4.76 

 4.62 

 3. 25 

 3.39 

 92.93 

 1.83 

 3. (15 

 4.,S7 

 4.72 

 3. .50 

 4.44 

 4.77 

 4.46 

 4.63 

 6.99 

 4.82 



Calcium 

 sulphate 



(CaSO,). 



24. 78 

 8.17 

 79.23 

 79.69 

 80. 88 

 85.69 

 81.24 

 84.39 

 80.61 

 S3. 75 

 68.89 

 64.97 

 1.91 

 54.42 

 67. 01 

 76.64 

 81.65 

 77.01 

 81.64 

 79.48 

 87.17 

 78. 37 

 34. 20 

 80.99 



Magne- 

 sium sul- 

 phate 



{MgS04). 



12.31 

 4.91 

 4.03 

 2.44 

 4.42 

 3.30 

 4.39 

 2.89 

 5. 58 

 3.42 

 7.93 

 7. 55 

 3.07 



16.03 

 9.64 

 6.03 

 5.19 

 4.79 

 5. ,54 

 4.19 

 4.87 

 4.92 



Magne- 

 sium 

 chlorid 



(MgCU). 



7.93 



43. 78 

 .18 



.16 



.79 



Potas- 

 sium 

 chlorid 



(KCl). 



16. 13 



5.93 



5.99 

 2.11 

 3.67 

 4. 23 

 3. .56 

 2.90 

 2. 57 

 2.66 

 3.19 

 3.70 

 4.03 

 3.71 

 .55 

 8. .50 

 4.72 

 2. 95 

 1.43 

 3.71 

 2.83 

 1.76 

 1.61 

 1.90 

 3.37 

 2. 20 



Sodium 

 chlorid 

 (NaCl). 



41.95 



38. 36 



10.65 



.15 



.32 



.80 



8.19 



5.03 

 5. 72 



93. 42 

 6.43 

 4.20 

 4.35 

 3.76 

 5.48 

 3.60 



11.73 

 3.40 

 4.62 



26.55 

 7.85 



Sodium 

 bicarbij- 



uate 

 (NaHCOa). 



7.04 

 2.67 

 2.24 

 2^88 

 2. .58 

 2.94 

 2. 17 

 2. 21 

 2.43 

 2.50 

 4.58 

 4.36 

 .89 

 7.19 

 4.33 

 2.71 

 2.78 

 3.76 

 2. 20 

 2. 05 



2. 95 



3. .54 

 1.40 

 2.74 



Sodium \ Other 

 sulphate constitu- 

 (Na.:S04). ents. 



10.61 



8.24 

 4.37 

 8.35 

 6.95 



6. 63 



9.54 



13.69 



7.43 

 10.10 

 6. 32 

 5.19 

 5. 25 

 4.10 



a 1.28 

 n;90 



6.65 



hl8. 35 



.29 .. 



aPotassium bicarbonate (KHCO.i). 



^Calcivun chlorid (CaCU). 



SOIL MANAGEMENT. 

 ROTATIONS, 



111 the grain-producing- districts of Algeriii the rotation — if it can be 

 called such -commonly followed consists of a yvwv (winter) in a cereal 

 crop followed bv a year of fallow. In other words, the land lies idle 



