Methods of soil investigations for agricultural engineering - Chemical laboratory tests - Part 7: Determination of readily soluble bivalent iron— 3 стр.
Drainage; Control of Sub-surface Water Management by Draining with Pipes, Open-ditch Drainage and Amelioration of the Subsoil; General Instructions and Special Cases— 17 стр.
Drainage; Control of Sub-surface Water Management by Drainage with Pipes, Open-ditch Drainage and Amelioration of the Subsoil; Important Data for Planning and Dimensioning— 17 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.
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 engineering; chemical laboratory tests, determination of the plant detrimental sulphides and poly sulphides in the soil— 2 стр.
Methods of soil analysis for water management for agricultural purposes; chemical laboratory tests; determination of easily soluble bivalent iron in a soil— 2 стр.
Methods of soil analysis for water management for agricultural purposes; chemical laboratory tests; determination of easily soluble bivalent iron in a soil— 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 water engineering - Chemical laboratory tests - Part 3: Determination of the loss on ignition and the residue of soil after ignition— 4 стр.
