The ground is the layer|cape of earth|land where the plants|floors root and from where they obtain the water and the indispensable nutrients to develop. The characteristics of the ground are very variable and affect the crops|growings in a determining way. To know which are these characteristics in each case, a study of the ground has to be made through an analysis, the reliability of the results that it|he|she depends on to a large extent of the quality of the sample|exhibition picked up. It is for this motive that next we offer you the models which it is necessary always to follow when taking samples|exhibitions of earth|land.
DAM|DOSE|PREY OF EARTH|LAND SAMPLES|EXHIBITIONS
How do the different zones of an estate have to be delimited?
When taking a sample|exhibition of earth|land, the estate has to divide into homogeneous allotments of sampling. The surface|area of each does not have to surpass the ci nchectàrees, in the case of extensive crops|growings, or the two hectares, if it is about horticultural crops|growings.
To delimit the different allotments the following elements have to be taken into account:
¾ The form of the terrain (inclination, orientation, depressions, etc)
¾ The aspect|look of the ground (material, color, zones of accumulation of water, etc)
¾ The development of the plants|floors
Depth of the sampling
The depth that the sample|exhibition of earth|land has to be taken away from depends on the crop|growing that there is in the allotment, but it is in general convenient to eliminate the first 5 centimeters from superficial earth|land. For the major part of the crops|growings there is enough of picking up the first 30 centimeters of earth|land in depth. In the case of woody crops|growings with deep roots, it is advisable to take a sample|exhibition of the first 30 centimeters, but also a sample|exhibition of the subsoil, between the 30 and the 60 centimeters.
Procedure of the sampling
For each allotment it is recommended to take from fifteen to forty samples|exhibitions, a trajectory in zigzag or in a systematic way following each one a certain distance, appealing all the surface|area. All samples|exhibitions have to get|put into a pitcher or a plastic bag and, once the dam|dose|prey of samples|exhibitions finished, it is advisable to mix them a homogeneous sample|exhibition all to obtain and he|she|it agrees on eliminating all remains from crop|growing, the stones, etc.
The sample|exhibition has to be identified with all the data of the allotment, and it is indispensable to make figure in the label the number of the polygon and of the allotment.
To take the samples|exhibitions a drill|gimlet has to be used or, if one does not have, a shovel. A hole has to be made in the form of V and has to be cut a portion of 1, 5 centimeters of the wall of the hole, along all the depth.
Material to transport the sample|exhibition and necessary amount
The sample|exhibition to analyze has to put on in a clean plastic bag, which|who, if possible, tengui hermetical closing. The necessary amount is of approximately 1 quilogram.
It is recommended that he|she|it is taken|carried to the laboratory com més aviat better after having picked it|her up.
LABELLING AND DATA NECESSARY FOR THE REQUEST
The sample|exhibition has to arrive to the laboratory identified duly, with the reference that the person requesting of the analysis brings: polygon and allotment, and species and variety, name|noun of the estate...
Apart, when filling the request he have to make to be evident the following data:
Data of the requesting person:
Name|Noun, lineages and DNI
Address and telephone
Data of the estate:
Polygon and allotment
Location: name|noun, town, etc.
Type of crop|growing
Data of the crop|growing:
Species and variety
Age and frame|mark of plantation
Data of fertilization of the last year:
Type of mineral fertilizer (kg/ha)
Amendments (manure, purins, muds of treatment plant, etc)
Characteristics of the sample|exhibition
Surface|Area of which the sample|exhibition is representative
Depth of the sample|exhibition
Motive of the request:
Obtaining recommendations for the fertilization|tanning
Detecting anomalies (in this case, he|she|it agrees on indicating which)
Implanting a crop|growing (in this case, it has to be made be evident the species and the variety)
Determinations in the analyses to determine the fertility of the agricultural grounds
Active Calcareous ¾
¾ organic Matter|Subject (MO)
Total ¾ Nitrògen
¾ Phosphorus (Olsen)
¾ interchangeable Potassium
Qualified ¾ of catiònic exchange (CIC)
¾ interchangeable Sodium
¾ interchangeable Calcium
¾ interchangeable Magnesium
¾ interchangeable Hydrogen
¾ Humidity|Damp of the substratum
¾ Retention of the humidity|damp (% of saturation)
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