Methods of soil investigations for agricultural engineering; chemical laboratory tests, determination of the plant detrimental sulphides and poly sulphides in the soil— 2 стр.
Methods of soil investigations for agricultural engineering - Chemical laboratory tests - Part 7: Determination of readily soluble bivalent iron— 3 стр.
Methods of soil analysis for water management for agricultural purposes; Chemical laboratory tests; Determination of the pH value of the soil and the lime requirement— 2 стр.
Methods of soil investigations for agricultural engineering - Chemical laboratory tests - Part 10: Testing and evaluation of water for irrigation— 11 стр.
Methods of soil investigations for agricultural engineering - Chemical laboratory tests - Part 6: Determination of iron soluble in oxalate solution— 3 стр.
Methods of soil investigations for agricultural water engineering - Chemical laboratory tests - Part 3: Determination of the loss on ignition and the residue of soil after ignition— 4 стр.
